./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_36-indirect_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 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:33:29,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:33:29,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:33:29,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:33:29,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:33:29,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:33:29,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:33:29,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:33:29,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:33:29,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:33:29,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:33:29,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:33:29,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:33:29,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:33:29,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:33:29,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:33:29,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:33:29,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:33:29,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:33:29,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:33:29,123 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:33:29,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:33:29,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:33:29,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:33:29,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:33:29,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:33:29,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:33:29,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:33:29,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:33:29,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:33:29,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:33:29,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:33:29,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:33:29,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:33:29,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:33:29,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:33:29,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:33:29,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:33:29,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:33:29,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:33:29,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:33:29,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:33:29,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:33:29,174 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:33:29,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:33:29,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:33:29,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:33:29,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:33:29,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:33:29,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:33:29,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:33:29,177 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:33:29,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:33:29,178 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:33:29,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:33:29,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:33:29,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:33:29,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:33:29,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:33:29,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:33:29,180 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:33:29,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:33:29,181 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:33:29,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:33:29,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:33:29,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:33:29,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:33:29,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:33:29,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:33:29,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:33:29,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:33:29,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:33:29,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:33:29,183 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:33:29,184 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:33:29,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:33:29,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 [2022-07-22 21:33:29,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:33:29,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:33:29,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:33:29,440 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:33:29,443 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:33:29,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2022-07-22 21:33:29,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a0e734cc/1eeb5d7aa0014c1d9064b9b22089bf8b/FLAG7cd0291be [2022-07-22 21:33:29,932 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:33:29,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2022-07-22 21:33:29,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a0e734cc/1eeb5d7aa0014c1d9064b9b22089bf8b/FLAG7cd0291be [2022-07-22 21:33:30,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a0e734cc/1eeb5d7aa0014c1d9064b9b22089bf8b [2022-07-22 21:33:30,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:33:30,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:33:30,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:33:30,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:33:30,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:33:30,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a9d49e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30, skipping insertion in model container [2022-07-22 21:33:30,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:33:30,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:33:30,679 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_36-indirect_racefree.i[30176,30189] [2022-07-22 21:33:30,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:33:30,720 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:33:30,766 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_36-indirect_racefree.i[30176,30189] [2022-07-22 21:33:30,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:33:30,805 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:33:30,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30 WrapperNode [2022-07-22 21:33:30,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:33:30,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:33:30,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:33:30,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:33:30,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,853 INFO L137 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-07-22 21:33:30,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:33:30,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:33:30,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:33:30,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:33:30,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:33:30,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:33:30,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:33:30,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:33:30,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (1/1) ... [2022-07-22 21:33:30,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:33:30,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:30,919 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) [2022-07-22 21:33:30,923 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 [2022-07-22 21:33:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:33:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:33:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:33:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:33:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:33:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-22 21:33:30,949 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-22 21:33:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:33:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:33:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:33:30,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:33:30,951 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:33:31,086 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:33:31,087 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:33:31,300 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:33:31,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:33:31,308 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-22 21:33:31,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:33:31 BoogieIcfgContainer [2022-07-22 21:33:31,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:33:31,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:33:31,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:33:31,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:33:31,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:33:30" (1/3) ... [2022-07-22 21:33:31,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4a5f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:33:31, skipping insertion in model container [2022-07-22 21:33:31,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:33:30" (2/3) ... [2022-07-22 21:33:31,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4a5f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:33:31, skipping insertion in model container [2022-07-22 21:33:31,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:33:31" (3/3) ... [2022-07-22 21:33:31,319 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2022-07-22 21:33:31,324 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:33:31,333 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:33:31,333 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:33:31,333 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:33:31,388 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:33:31,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 108 places, 117 transitions, 242 flow [2022-07-22 21:33:31,484 INFO L129 PetriNetUnfolder]: 17/155 cut-off events. [2022-07-22 21:33:31,484 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:33:31,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 155 events. 17/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 381 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2022-07-22 21:33:31,491 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 117 transitions, 242 flow [2022-07-22 21:33:31,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 229 flow [2022-07-22 21:33:31,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:31,511 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:33:31,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:31,532 INFO L129 PetriNetUnfolder]: 5/88 cut-off events. [2022-07-22 21:33:31,532 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:31,533 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:31,533 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] [2022-07-22 21:33:31,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:31,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1995812797, now seen corresponding path program 1 times [2022-07-22 21:33:31,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:31,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65949882] [2022-07-22 21:33:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:31,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:31,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65949882] [2022-07-22 21:33:31,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65949882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:31,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:31,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:31,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068429762] [2022-07-22 21:33:31,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:31,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:31,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:31,847 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 117 [2022-07-22 21:33:31,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:31,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 117 [2022-07-22 21:33:31,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:31,893 INFO L129 PetriNetUnfolder]: 0/104 cut-off events. [2022-07-22 21:33:31,893 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:31,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 0/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 23/124 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-22 21:33:31,895 INFO L132 encePairwiseOnDemand]: 103/117 looper letters, 8 selfloop transitions, 2 changer transitions 16/102 dead transitions. [2022-07-22 21:33:31,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 102 transitions, 229 flow [2022-07-22 21:33:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-07-22 21:33:31,916 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9031339031339032 [2022-07-22 21:33:31,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-07-22 21:33:31,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-07-22 21:33:31,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:31,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-07-22 21:33:31,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,943 INFO L186 Difference]: Start difference. First operand has 104 places, 112 transitions, 229 flow. Second operand 3 states and 317 transitions. [2022-07-22 21:33:31,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 102 transitions, 229 flow [2022-07-22 21:33:31,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 102 transitions, 229 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:31,950 INFO L242 Difference]: Finished difference. Result has 106 places, 84 transitions, 181 flow [2022-07-22 21:33:31,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=106, PETRI_TRANSITIONS=84} [2022-07-22 21:33:31,956 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2022-07-22 21:33:31,956 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 84 transitions, 181 flow [2022-07-22 21:33:31,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:31,957 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:31,957 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:31,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:33:31,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:31,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2130970929, now seen corresponding path program 1 times [2022-07-22 21:33:31,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:31,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786807601] [2022-07-22 21:33:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:31,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:32,005 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:32,060 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:32,063 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:32,065 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:32,067 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:32,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:33:32,068 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 21:33:32,075 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:32,076 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-22 21:33:32,098 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:33:32,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 137 places, 151 transitions, 320 flow [2022-07-22 21:33:32,170 INFO L129 PetriNetUnfolder]: 31/252 cut-off events. [2022-07-22 21:33:32,171 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:33:32,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 252 events. 31/252 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 760 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2022-07-22 21:33:32,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 151 transitions, 320 flow [2022-07-22 21:33:32,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 151 transitions, 320 flow [2022-07-22 21:33:32,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:32,186 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:33:32,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:32,202 INFO L129 PetriNetUnfolder]: 6/91 cut-off events. [2022-07-22 21:33:32,202 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:32,203 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:32,203 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] [2022-07-22 21:33:32,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1413483307, now seen corresponding path program 1 times [2022-07-22 21:33:32,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:32,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132030095] [2022-07-22 21:33:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:32,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:32,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132030095] [2022-07-22 21:33:32,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132030095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:32,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:32,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:33:32,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286008886] [2022-07-22 21:33:32,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:32,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:33:32,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:33:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:33:32,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 151 [2022-07-22 21:33:32,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 151 transitions, 320 flow. Second operand has 2 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:32,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 151 [2022-07-22 21:33:32,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:32,348 INFO L129 PetriNetUnfolder]: 3/221 cut-off events. [2022-07-22 21:33:32,349 INFO L130 PetriNetUnfolder]: For 21/27 co-relation queries the response was YES. [2022-07-22 21:33:32,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 221 events. 3/221 cut-off events. For 21/27 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 564 event pairs, 0 based on Foata normal form. 42/253 useless extension candidates. Maximal degree in co-relation 141. Up to 7 conditions per place. [2022-07-22 21:33:32,350 INFO L132 encePairwiseOnDemand]: 134/151 looper letters, 2 selfloop transitions, 0 changer transitions 22/133 dead transitions. [2022-07-22 21:33:32,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 133 transitions, 292 flow [2022-07-22 21:33:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:33:32,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:33:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 279 transitions. [2022-07-22 21:33:32,354 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9238410596026491 [2022-07-22 21:33:32,354 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 279 transitions. [2022-07-22 21:33:32,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 279 transitions. [2022-07-22 21:33:32,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:32,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 279 transitions. [2022-07-22 21:33:32,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 139.5) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,357 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,357 INFO L186 Difference]: Start difference. First operand has 137 places, 151 transitions, 320 flow. Second operand 2 states and 279 transitions. [2022-07-22 21:33:32,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 133 transitions, 292 flow [2022-07-22 21:33:32,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 133 transitions, 292 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:32,363 INFO L242 Difference]: Finished difference. Result has 137 places, 111 transitions, 234 flow [2022-07-22 21:33:32,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=234, PETRI_PLACES=137, PETRI_TRANSITIONS=111} [2022-07-22 21:33:32,366 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, 0 predicate places. [2022-07-22 21:33:32,366 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 111 transitions, 234 flow [2022-07-22 21:33:32,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:32,367 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] [2022-07-22 21:33:32,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:33:32,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:32,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1284400588, now seen corresponding path program 1 times [2022-07-22 21:33:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:32,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277696458] [2022-07-22 21:33:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:32,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277696458] [2022-07-22 21:33:32,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277696458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:32,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:32,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:32,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385146527] [2022-07-22 21:33:32,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:32,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:32,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:32,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:32,467 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 151 [2022-07-22 21:33:32,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 111 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:32,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 151 [2022-07-22 21:33:32,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:32,511 INFO L129 PetriNetUnfolder]: 0/136 cut-off events. [2022-07-22 21:33:32,511 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:33:32,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 136 events. 0/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 211 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. [2022-07-22 21:33:32,512 INFO L132 encePairwiseOnDemand]: 148/151 looper letters, 11 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2022-07-22 21:33:32,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 268 flow [2022-07-22 21:33:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2022-07-22 21:33:32,514 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8388520971302428 [2022-07-22 21:33:32,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2022-07-22 21:33:32,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2022-07-22 21:33:32,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:32,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2022-07-22 21:33:32,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,519 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,519 INFO L186 Difference]: Start difference. First operand has 137 places, 111 transitions, 234 flow. Second operand 3 states and 380 transitions. [2022-07-22 21:33:32,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 268 flow [2022-07-22 21:33:32,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 115 transitions, 266 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:32,525 INFO L242 Difference]: Finished difference. Result has 120 places, 112 transitions, 244 flow [2022-07-22 21:33:32,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=120, PETRI_TRANSITIONS=112} [2022-07-22 21:33:32,527 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, -17 predicate places. [2022-07-22 21:33:32,528 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 112 transitions, 244 flow [2022-07-22 21:33:32,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,528 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:32,529 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:32,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:33:32,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:32,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1394495559, now seen corresponding path program 1 times [2022-07-22 21:33:32,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:32,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214577356] [2022-07-22 21:33:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:32,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:32,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214577356] [2022-07-22 21:33:32,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214577356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:32,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076189027] [2022-07-22 21:33:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:32,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:32,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:32,673 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) [2022-07-22 21:33:32,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:33:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:32,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:32,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:32,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076189027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:32,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:32,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:32,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702557396] [2022-07-22 21:33:32,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:32,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:32,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:32,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:32,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:32,940 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 151 [2022-07-22 21:33:32,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 112 transitions, 244 flow. Second operand has 10 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:32,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:32,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 151 [2022-07-22 21:33:32,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:33,019 INFO L129 PetriNetUnfolder]: 0/112 cut-off events. [2022-07-22 21:33:33,019 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:33:33,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 112 events. 0/112 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. 2/114 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-22 21:33:33,020 INFO L132 encePairwiseOnDemand]: 146/151 looper letters, 9 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2022-07-22 21:33:33,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 106 transitions, 262 flow [2022-07-22 21:33:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1107 transitions. [2022-07-22 21:33:33,024 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8145695364238411 [2022-07-22 21:33:33,024 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1107 transitions. [2022-07-22 21:33:33,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1107 transitions. [2022-07-22 21:33:33,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:33,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1107 transitions. [2022-07-22 21:33:33,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 123.0) internal successors, (1107), 9 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 151.0) internal successors, (1510), 10 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,032 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 151.0) internal successors, (1510), 10 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,032 INFO L186 Difference]: Start difference. First operand has 120 places, 112 transitions, 244 flow. Second operand 9 states and 1107 transitions. [2022-07-22 21:33:33,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 106 transitions, 262 flow [2022-07-22 21:33:33,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 106 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:33,038 INFO L242 Difference]: Finished difference. Result has 115 places, 102 transitions, 234 flow [2022-07-22 21:33:33,038 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2022-07-22 21:33:33,039 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, -22 predicate places. [2022-07-22 21:33:33,040 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 234 flow [2022-07-22 21:33:33,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:33,041 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:33,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 21:33:33,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:33,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1558999955, now seen corresponding path program 1 times [2022-07-22 21:33:33,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:33,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637231010] [2022-07-22 21:33:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:33,279 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:33,302 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:33,302 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:33,302 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:33,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:33,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:33:33,303 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-22 21:33:33,304 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:33,304 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-22 21:33:33,334 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:33:33,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2022-07-22 21:33:33,400 INFO L129 PetriNetUnfolder]: 50/382 cut-off events. [2022-07-22 21:33:33,401 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-22 21:33:33,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 382 events. 50/382 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1303 event pairs, 1 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 260. Up to 16 conditions per place. [2022-07-22 21:33:33,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 400 flow [2022-07-22 21:33:33,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 400 flow [2022-07-22 21:33:33,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:33,409 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:33:33,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:33,416 INFO L129 PetriNetUnfolder]: 6/95 cut-off events. [2022-07-22 21:33:33,417 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:33,417 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:33,417 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] [2022-07-22 21:33:33,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:33,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1747768563, now seen corresponding path program 1 times [2022-07-22 21:33:33,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:33,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996948570] [2022-07-22 21:33:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:33,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:33,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:33,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996948570] [2022-07-22 21:33:33,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996948570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:33,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:33,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:33,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478916377] [2022-07-22 21:33:33,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:33,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:33,462 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 185 [2022-07-22 21:33:33,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 185 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:33,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 185 [2022-07-22 21:33:33,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:33,532 INFO L129 PetriNetUnfolder]: 7/317 cut-off events. [2022-07-22 21:33:33,533 INFO L130 PetriNetUnfolder]: For 49/91 co-relation queries the response was YES. [2022-07-22 21:33:33,535 INFO L84 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 317 events. 7/317 cut-off events. For 49/91 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 966 event pairs, 1 based on Foata normal form. 192/495 useless extension candidates. Maximal degree in co-relation 230. Up to 30 conditions per place. [2022-07-22 21:33:33,535 INFO L132 encePairwiseOnDemand]: 159/185 looper letters, 12 selfloop transitions, 2 changer transitions 23/165 dead transitions. [2022-07-22 21:33:33,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 165 transitions, 394 flow [2022-07-22 21:33:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:33,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2022-07-22 21:33:33,538 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8864864864864865 [2022-07-22 21:33:33,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2022-07-22 21:33:33,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2022-07-22 21:33:33,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:33,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2022-07-22 21:33:33,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,542 INFO L186 Difference]: Start difference. First operand has 166 places, 185 transitions, 400 flow. Second operand 3 states and 492 transitions. [2022-07-22 21:33:33,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 165 transitions, 394 flow [2022-07-22 21:33:33,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:33,546 INFO L242 Difference]: Finished difference. Result has 168 places, 139 transitions, 309 flow [2022-07-22 21:33:33,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=309, PETRI_PLACES=168, PETRI_TRANSITIONS=139} [2022-07-22 21:33:33,547 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 2 predicate places. [2022-07-22 21:33:33,547 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 139 transitions, 309 flow [2022-07-22 21:33:33,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,548 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:33,548 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:33,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:33:33,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash -109138734, now seen corresponding path program 1 times [2022-07-22 21:33:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:33,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048270074] [2022-07-22 21:33:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:33,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:33,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:33,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048270074] [2022-07-22 21:33:33,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048270074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:33,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589893947] [2022-07-22 21:33:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:33,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:33,595 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) [2022-07-22 21:33:33,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:33:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:33,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:33,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:33,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589893947] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:33,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:33,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:33,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388402862] [2022-07-22 21:33:33,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:33,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:33,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:33,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:33,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:33,766 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 185 [2022-07-22 21:33:33,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 139 transitions, 309 flow. Second operand has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:33,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 185 [2022-07-22 21:33:33,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:33,863 INFO L129 PetriNetUnfolder]: 0/160 cut-off events. [2022-07-22 21:33:33,863 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:33:33,863 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 160 events. 0/160 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 245 event pairs, 0 based on Foata normal form. 2/162 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-22 21:33:33,864 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 13 selfloop transitions, 9 changer transitions 0/149 dead transitions. [2022-07-22 21:33:33,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 149 transitions, 375 flow [2022-07-22 21:33:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1347 transitions. [2022-07-22 21:33:33,868 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.809009009009009 [2022-07-22 21:33:33,868 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1347 transitions. [2022-07-22 21:33:33,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1347 transitions. [2022-07-22 21:33:33,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:33,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1347 transitions. [2022-07-22 21:33:33,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.66666666666666) internal successors, (1347), 9 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,875 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,875 INFO L186 Difference]: Start difference. First operand has 168 places, 139 transitions, 309 flow. Second operand 9 states and 1347 transitions. [2022-07-22 21:33:33,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 149 transitions, 375 flow [2022-07-22 21:33:33,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 149 transitions, 367 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:33,879 INFO L242 Difference]: Finished difference. Result has 158 places, 145 transitions, 351 flow [2022-07-22 21:33:33,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=351, PETRI_PLACES=158, PETRI_TRANSITIONS=145} [2022-07-22 21:33:33,881 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, -8 predicate places. [2022-07-22 21:33:33,881 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 145 transitions, 351 flow [2022-07-22 21:33:33,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:33,882 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:33,882 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:33,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:34,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-22 21:33:34,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:34,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:34,096 INFO L85 PathProgramCache]: Analyzing trace with hash -258612950, now seen corresponding path program 1 times [2022-07-22 21:33:34,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:34,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511433662] [2022-07-22 21:33:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:34,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:34,128 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:34,174 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:34,175 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:34,176 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:34,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:34,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:33:34,176 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 21:33:34,177 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:34,178 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-22 21:33:34,208 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 21:33:34,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 195 places, 219 transitions, 482 flow [2022-07-22 21:33:34,309 INFO L129 PetriNetUnfolder]: 81/580 cut-off events. [2022-07-22 21:33:34,309 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-22 21:33:34,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 580 events. 81/580 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2277 event pairs, 6 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 402. Up to 32 conditions per place. [2022-07-22 21:33:34,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 219 transitions, 482 flow [2022-07-22 21:33:34,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 219 transitions, 482 flow [2022-07-22 21:33:34,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:34,323 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:33:34,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:34,330 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2022-07-22 21:33:34,330 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:34,330 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:34,331 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] [2022-07-22 21:33:34,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:34,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash 476626153, now seen corresponding path program 1 times [2022-07-22 21:33:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:34,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839895597] [2022-07-22 21:33:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:34,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:34,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:34,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839895597] [2022-07-22 21:33:34,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839895597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:34,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:34,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:33:34,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772581068] [2022-07-22 21:33:34,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:34,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:33:34,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:34,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:33:34,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:33:34,359 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 219 [2022-07-22 21:33:34,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 219 transitions, 482 flow. Second operand has 2 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:34,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 219 [2022-07-22 21:33:34,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:34,450 INFO L129 PetriNetUnfolder]: 21/515 cut-off events. [2022-07-22 21:33:34,450 INFO L130 PetriNetUnfolder]: For 126/142 co-relation queries the response was YES. [2022-07-22 21:33:34,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 515 events. 21/515 cut-off events. For 126/142 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2060 event pairs, 6 based on Foata normal form. 248/737 useless extension candidates. Maximal degree in co-relation 371. Up to 37 conditions per place. [2022-07-22 21:33:34,456 INFO L132 encePairwiseOnDemand]: 190/219 looper letters, 4 selfloop transitions, 0 changer transitions 24/189 dead transitions. [2022-07-22 21:33:34,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 189 transitions, 438 flow [2022-07-22 21:33:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:33:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:33:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 399 transitions. [2022-07-22 21:33:34,458 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.910958904109589 [2022-07-22 21:33:34,458 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 399 transitions. [2022-07-22 21:33:34,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 399 transitions. [2022-07-22 21:33:34,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:34,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 399 transitions. [2022-07-22 21:33:34,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 199.5) internal successors, (399), 2 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 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) [2022-07-22 21:33:34,461 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 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) [2022-07-22 21:33:34,461 INFO L186 Difference]: Start difference. First operand has 195 places, 219 transitions, 482 flow. Second operand 2 states and 399 transitions. [2022-07-22 21:33:34,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 189 transitions, 438 flow [2022-07-22 21:33:34,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 189 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:34,465 INFO L242 Difference]: Finished difference. Result has 195 places, 165 transitions, 362 flow [2022-07-22 21:33:34,466 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=195, PETRI_TRANSITIONS=165} [2022-07-22 21:33:34,466 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, 0 predicate places. [2022-07-22 21:33:34,466 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 165 transitions, 362 flow [2022-07-22 21:33:34,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,467 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:34,467 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] [2022-07-22 21:33:34,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:33:34,468 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 605708872, now seen corresponding path program 1 times [2022-07-22 21:33:34,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:34,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924214427] [2022-07-22 21:33:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:34,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:34,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924214427] [2022-07-22 21:33:34,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924214427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:34,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:34,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:34,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196283067] [2022-07-22 21:33:34,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:34,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:34,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:34,518 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 219 [2022-07-22 21:33:34,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 165 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:34,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 219 [2022-07-22 21:33:34,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:34,582 INFO L129 PetriNetUnfolder]: 0/232 cut-off events. [2022-07-22 21:33:34,582 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-22 21:33:34,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 232 events. 0/232 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 565 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-22 21:33:34,583 INFO L132 encePairwiseOnDemand]: 216/219 looper letters, 13 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2022-07-22 21:33:34,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 169 transitions, 400 flow [2022-07-22 21:33:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2022-07-22 21:33:34,586 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8188736681887366 [2022-07-22 21:33:34,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2022-07-22 21:33:34,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2022-07-22 21:33:34,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:34,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2022-07-22 21:33:34,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,590 INFO L186 Difference]: Start difference. First operand has 195 places, 165 transitions, 362 flow. Second operand 3 states and 538 transitions. [2022-07-22 21:33:34,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 169 transitions, 400 flow [2022-07-22 21:33:34,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 169 transitions, 388 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:34,599 INFO L242 Difference]: Finished difference. Result has 178 places, 166 transitions, 362 flow [2022-07-22 21:33:34,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=178, PETRI_TRANSITIONS=166} [2022-07-22 21:33:34,601 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, -17 predicate places. [2022-07-22 21:33:34,601 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 166 transitions, 362 flow [2022-07-22 21:33:34,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:34,602 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:34,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:33:34,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1870810355, now seen corresponding path program 1 times [2022-07-22 21:33:34,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:34,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832889492] [2022-07-22 21:33:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:34,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:34,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:34,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832889492] [2022-07-22 21:33:34,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832889492] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:34,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447002809] [2022-07-22 21:33:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:34,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:34,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:34,646 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) [2022-07-22 21:33:34,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:33:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:34,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:34,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:34,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:34,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447002809] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:34,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:34,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740234197] [2022-07-22 21:33:34,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:34,798 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 219 [2022-07-22 21:33:34,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 166 transitions, 362 flow. Second operand has 10 states, 10 states have (on average 175.3) internal successors, (1753), 10 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:34,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 219 [2022-07-22 21:33:34,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:34,888 INFO L129 PetriNetUnfolder]: 0/208 cut-off events. [2022-07-22 21:33:34,888 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:33:34,889 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 422 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. [2022-07-22 21:33:34,890 INFO L132 encePairwiseOnDemand]: 213/219 looper letters, 14 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2022-07-22 21:33:34,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 430 flow [2022-07-22 21:33:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1582 transitions. [2022-07-22 21:33:34,894 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8026382546930492 [2022-07-22 21:33:34,894 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1582 transitions. [2022-07-22 21:33:34,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1582 transitions. [2022-07-22 21:33:34,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:34,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1582 transitions. [2022-07-22 21:33:34,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.77777777777777) internal successors, (1582), 9 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,904 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,904 INFO L186 Difference]: Start difference. First operand has 178 places, 166 transitions, 362 flow. Second operand 9 states and 1582 transitions. [2022-07-22 21:33:34,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 430 flow [2022-07-22 21:33:34,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 176 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:34,909 INFO L242 Difference]: Finished difference. Result has 188 places, 172 transitions, 410 flow [2022-07-22 21:33:34,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=188, PETRI_TRANSITIONS=172} [2022-07-22 21:33:34,910 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, -7 predicate places. [2022-07-22 21:33:34,910 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 172 transitions, 410 flow [2022-07-22 21:33:34,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.3) internal successors, (1753), 10 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:34,912 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:34,912 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:34,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:35,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:35,136 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2118097268, now seen corresponding path program 1 times [2022-07-22 21:33:35,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:35,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253476168] [2022-07-22 21:33:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:35,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:35,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253476168] [2022-07-22 21:33:35,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253476168] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300093059] [2022-07-22 21:33:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:35,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:35,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:35,237 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) [2022-07-22 21:33:35,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:33:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:35,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:33:35,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:35,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:35,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300093059] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:35,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:35,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:33:35,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423322549] [2022-07-22 21:33:35,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:33:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:35,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:33:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:33:35,522 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 219 [2022-07-22 21:33:35,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 172 transitions, 410 flow. Second operand has 18 states, 18 states have (on average 175.61111111111111) internal successors, (3161), 18 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:35,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:35,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 219 [2022-07-22 21:33:35,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:35,657 INFO L129 PetriNetUnfolder]: 0/184 cut-off events. [2022-07-22 21:33:35,657 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-22 21:33:35,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 184 events. 0/184 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. 2/186 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-22 21:33:35,658 INFO L132 encePairwiseOnDemand]: 214/219 looper letters, 15 selfloop transitions, 13 changer transitions 0/170 dead transitions. [2022-07-22 21:33:35,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 170 transitions, 474 flow [2022-07-22 21:33:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:33:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:33:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2625 transitions. [2022-07-22 21:33:35,664 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7990867579908676 [2022-07-22 21:33:35,664 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2625 transitions. [2022-07-22 21:33:35,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2625 transitions. [2022-07-22 21:33:35,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:35,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2625 transitions. [2022-07-22 21:33:35,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.0) internal successors, (2625), 15 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:35,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:35,679 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:35,679 INFO L186 Difference]: Start difference. First operand has 188 places, 172 transitions, 410 flow. Second operand 15 states and 2625 transitions. [2022-07-22 21:33:35,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 170 transitions, 474 flow [2022-07-22 21:33:35,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 170 transitions, 457 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-22 21:33:35,683 INFO L242 Difference]: Finished difference. Result has 186 places, 163 transitions, 406 flow [2022-07-22 21:33:35,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=406, PETRI_PLACES=186, PETRI_TRANSITIONS=163} [2022-07-22 21:33:35,684 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, -9 predicate places. [2022-07-22 21:33:35,684 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 163 transitions, 406 flow [2022-07-22 21:33:35,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 175.61111111111111) internal successors, (3161), 18 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:35,686 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:35,686 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:35,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:35,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:35,900 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:35,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1171405288, now seen corresponding path program 1 times [2022-07-22 21:33:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:35,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841016083] [2022-07-22 21:33:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:35,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:35,920 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:35,955 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:35,955 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:35,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:35,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:35,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:33:35,956 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 21:33:35,957 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:35,958 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-22 21:33:35,983 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-22 21:33:35,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 224 places, 253 transitions, 566 flow [2022-07-22 21:33:36,152 INFO L129 PetriNetUnfolder]: 140/918 cut-off events. [2022-07-22 21:33:36,152 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-22 21:33:36,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 918 events. 140/918 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4130 event pairs, 23 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 625. Up to 80 conditions per place. [2022-07-22 21:33:36,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 253 transitions, 566 flow [2022-07-22 21:33:36,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 253 transitions, 566 flow [2022-07-22 21:33:36,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:36,187 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:33:36,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:36,194 INFO L129 PetriNetUnfolder]: 6/89 cut-off events. [2022-07-22 21:33:36,194 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:36,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:36,195 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] [2022-07-22 21:33:36,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1351981702, now seen corresponding path program 1 times [2022-07-22 21:33:36,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:36,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169320919] [2022-07-22 21:33:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:36,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:36,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:36,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169320919] [2022-07-22 21:33:36,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169320919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:36,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:36,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:33:36,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390004112] [2022-07-22 21:33:36,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:36,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:33:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:33:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:33:36,219 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 253 [2022-07-22 21:33:36,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 253 transitions, 566 flow. Second operand has 2 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:36,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 253 [2022-07-22 21:33:36,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:36,405 INFO L129 PetriNetUnfolder]: 54/826 cut-off events. [2022-07-22 21:33:36,406 INFO L130 PetriNetUnfolder]: For 294/324 co-relation queries the response was YES. [2022-07-22 21:33:36,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 826 events. 54/826 cut-off events. For 294/324 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3937 event pairs, 23 based on Foata normal form. 574/1356 useless extension candidates. Maximal degree in co-relation 596. Up to 86 conditions per place. [2022-07-22 21:33:36,411 INFO L132 encePairwiseOnDemand]: 218/253 looper letters, 5 selfloop transitions, 0 changer transitions 25/217 dead transitions. [2022-07-22 21:33:36,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 217 transitions, 514 flow [2022-07-22 21:33:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:33:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:33:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 459 transitions. [2022-07-22 21:33:36,413 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9071146245059288 [2022-07-22 21:33:36,413 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 459 transitions. [2022-07-22 21:33:36,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 459 transitions. [2022-07-22 21:33:36,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:36,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 459 transitions. [2022-07-22 21:33:36,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,416 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,416 INFO L186 Difference]: Start difference. First operand has 224 places, 253 transitions, 566 flow. Second operand 2 states and 459 transitions. [2022-07-22 21:33:36,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 217 transitions, 514 flow [2022-07-22 21:33:36,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 217 transitions, 514 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:36,421 INFO L242 Difference]: Finished difference. Result has 224 places, 192 transitions, 429 flow [2022-07-22 21:33:36,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=429, PETRI_PLACES=224, PETRI_TRANSITIONS=192} [2022-07-22 21:33:36,422 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 0 predicate places. [2022-07-22 21:33:36,422 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 192 transitions, 429 flow [2022-07-22 21:33:36,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,423 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:36,423 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] [2022-07-22 21:33:36,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:33:36,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:36,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:36,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1481064421, now seen corresponding path program 1 times [2022-07-22 21:33:36,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:36,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032886138] [2022-07-22 21:33:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:36,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:36,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:36,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032886138] [2022-07-22 21:33:36,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032886138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:36,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:36,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:36,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123113933] [2022-07-22 21:33:36,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:36,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:36,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:36,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:36,450 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 253 [2022-07-22 21:33:36,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 192 transitions, 429 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:36,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 253 [2022-07-22 21:33:36,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:36,507 INFO L129 PetriNetUnfolder]: 0/280 cut-off events. [2022-07-22 21:33:36,507 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:33:36,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 280 events. 0/280 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 742 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-22 21:33:36,508 INFO L132 encePairwiseOnDemand]: 250/253 looper letters, 14 selfloop transitions, 2 changer transitions 0/196 dead transitions. [2022-07-22 21:33:36,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 196 transitions, 469 flow [2022-07-22 21:33:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:36,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:36,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2022-07-22 21:33:36,510 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8129117259552042 [2022-07-22 21:33:36,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2022-07-22 21:33:36,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2022-07-22 21:33:36,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:36,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2022-07-22 21:33:36,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,514 INFO L186 Difference]: Start difference. First operand has 224 places, 192 transitions, 429 flow. Second operand 3 states and 617 transitions. [2022-07-22 21:33:36,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 196 transitions, 469 flow [2022-07-22 21:33:36,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 196 transitions, 449 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:36,519 INFO L242 Difference]: Finished difference. Result has 207 places, 193 transitions, 421 flow [2022-07-22 21:33:36,519 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=207, PETRI_TRANSITIONS=193} [2022-07-22 21:33:36,520 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -17 predicate places. [2022-07-22 21:33:36,520 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 193 transitions, 421 flow [2022-07-22 21:33:36,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,520 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:36,521 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:36,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:33:36,521 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:36,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1910424170, now seen corresponding path program 1 times [2022-07-22 21:33:36,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:36,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471341913] [2022-07-22 21:33:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:36,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471341913] [2022-07-22 21:33:36,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471341913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346881146] [2022-07-22 21:33:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:36,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:36,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:36,566 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) [2022-07-22 21:33:36,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:33:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:36,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:36,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:36,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:36,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346881146] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:36,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:36,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:36,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378494326] [2022-07-22 21:33:36,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:36,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:36,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:36,724 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 253 [2022-07-22 21:33:36,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 193 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 201.3) internal successors, (2013), 10 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:36,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 253 [2022-07-22 21:33:36,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:36,817 INFO L129 PetriNetUnfolder]: 0/256 cut-off events. [2022-07-22 21:33:36,818 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-22 21:33:36,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 256 events. 0/256 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 600 event pairs, 0 based on Foata normal form. 2/258 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-22 21:33:36,819 INFO L132 encePairwiseOnDemand]: 247/253 looper letters, 15 selfloop transitions, 9 changer transitions 0/203 dead transitions. [2022-07-22 21:33:36,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 203 transitions, 491 flow [2022-07-22 21:33:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1817 transitions. [2022-07-22 21:33:36,824 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2022-07-22 21:33:36,824 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1817 transitions. [2022-07-22 21:33:36,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1817 transitions. [2022-07-22 21:33:36,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:36,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1817 transitions. [2022-07-22 21:33:36,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.88888888888889) internal successors, (1817), 9 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,834 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,834 INFO L186 Difference]: Start difference. First operand has 207 places, 193 transitions, 421 flow. Second operand 9 states and 1817 transitions. [2022-07-22 21:33:36,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 203 transitions, 491 flow [2022-07-22 21:33:36,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 203 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:36,839 INFO L242 Difference]: Finished difference. Result has 217 places, 199 transitions, 469 flow [2022-07-22 21:33:36,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=469, PETRI_PLACES=217, PETRI_TRANSITIONS=199} [2022-07-22 21:33:36,840 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-07-22 21:33:36,840 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 199 transitions, 469 flow [2022-07-22 21:33:36,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 201.3) internal successors, (2013), 10 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:36,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:36,842 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:36,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:37,067 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,SelfDestructingSolverStorable16 [2022-07-22 21:33:37,067 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:37,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:37,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1383824465, now seen corresponding path program 1 times [2022-07-22 21:33:37,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:37,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568407407] [2022-07-22 21:33:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:37,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:37,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:37,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568407407] [2022-07-22 21:33:37,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568407407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:37,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413539506] [2022-07-22 21:33:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:37,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:37,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:37,140 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) [2022-07-22 21:33:37,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:33:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:37,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:33:37,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:37,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:37,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413539506] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:37,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:37,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:33:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757646193] [2022-07-22 21:33:37,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:37,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:33:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:33:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:33:37,409 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 253 [2022-07-22 21:33:37,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 199 transitions, 469 flow. Second operand has 18 states, 18 states have (on average 201.61111111111111) internal successors, (3629), 18 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:37,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:37,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 253 [2022-07-22 21:33:37,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:37,593 INFO L129 PetriNetUnfolder]: 0/220 cut-off events. [2022-07-22 21:33:37,594 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-22 21:33:37,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 220 events. 0/220 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. 3/223 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-22 21:33:37,595 INFO L132 encePairwiseOnDemand]: 248/253 looper letters, 18 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2022-07-22 21:33:37,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 202 transitions, 569 flow [2022-07-22 21:33:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:33:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:33:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3619 transitions. [2022-07-22 21:33:37,602 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946859903381642 [2022-07-22 21:33:37,602 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3619 transitions. [2022-07-22 21:33:37,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3619 transitions. [2022-07-22 21:33:37,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:37,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3619 transitions. [2022-07-22 21:33:37,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 201.05555555555554) internal successors, (3619), 18 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:37,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:37,620 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:37,620 INFO L186 Difference]: Start difference. First operand has 217 places, 199 transitions, 469 flow. Second operand 18 states and 3619 transitions. [2022-07-22 21:33:37,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 202 transitions, 569 flow [2022-07-22 21:33:37,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 202 transitions, 548 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-22 21:33:37,625 INFO L242 Difference]: Finished difference. Result has 218 places, 193 transitions, 484 flow [2022-07-22 21:33:37,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=484, PETRI_PLACES=218, PETRI_TRANSITIONS=193} [2022-07-22 21:33:37,625 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -6 predicate places. [2022-07-22 21:33:37,626 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 193 transitions, 484 flow [2022-07-22 21:33:37,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 201.61111111111111) internal successors, (3629), 18 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:37,627 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:37,627 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:37,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:37,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 21:33:37,843 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1562773209, now seen corresponding path program 1 times [2022-07-22 21:33:37,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:37,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903360821] [2022-07-22 21:33:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:37,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:37,868 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:37,899 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:37,899 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:37,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:37,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:37,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 21:33:37,900 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 21:33:37,901 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:37,901 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-22 21:33:37,924 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-22 21:33:37,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 253 places, 287 transitions, 652 flow [2022-07-22 21:33:38,165 INFO L129 PetriNetUnfolder]: 263/1544 cut-off events. [2022-07-22 21:33:38,165 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-22 21:33:38,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 1544 events. 263/1544 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8615 event pairs, 72 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 1017. Up to 192 conditions per place. [2022-07-22 21:33:38,234 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 287 transitions, 652 flow [2022-07-22 21:33:38,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 253 places, 287 transitions, 652 flow [2022-07-22 21:33:38,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:38,253 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:33:38,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:38,259 INFO L129 PetriNetUnfolder]: 5/86 cut-off events. [2022-07-22 21:33:38,259 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:38,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:38,260 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:38,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:38,261 INFO L85 PathProgramCache]: Analyzing trace with hash 749215365, now seen corresponding path program 1 times [2022-07-22 21:33:38,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:38,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166424378] [2022-07-22 21:33:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:38,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:38,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:38,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166424378] [2022-07-22 21:33:38,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166424378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:38,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:38,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:33:38,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164497622] [2022-07-22 21:33:38,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:38,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:33:38,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:33:38,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:33:38,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 287 [2022-07-22 21:33:38,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 287 transitions, 652 flow. Second operand has 2 states, 2 states have (on average 233.5) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:38,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 287 [2022-07-22 21:33:38,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:38,599 INFO L129 PetriNetUnfolder]: 135/1409 cut-off events. [2022-07-22 21:33:38,599 INFO L130 PetriNetUnfolder]: For 659/697 co-relation queries the response was YES. [2022-07-22 21:33:38,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 1409 events. 135/1409 cut-off events. For 659/697 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8290 event pairs, 72 based on Foata normal form. 1306/2637 useless extension candidates. Maximal degree in co-relation 1010. Up to 199 conditions per place. [2022-07-22 21:33:38,613 INFO L132 encePairwiseOnDemand]: 246/287 looper letters, 6 selfloop transitions, 0 changer transitions 26/245 dead transitions. [2022-07-22 21:33:38,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 245 transitions, 592 flow [2022-07-22 21:33:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:33:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:33:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 519 transitions. [2022-07-22 21:33:38,615 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9041811846689896 [2022-07-22 21:33:38,615 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 519 transitions. [2022-07-22 21:33:38,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 519 transitions. [2022-07-22 21:33:38,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:38,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 519 transitions. [2022-07-22 21:33:38,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,618 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,618 INFO L186 Difference]: Start difference. First operand has 253 places, 287 transitions, 652 flow. Second operand 2 states and 519 transitions. [2022-07-22 21:33:38,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 245 transitions, 592 flow [2022-07-22 21:33:38,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 245 transitions, 592 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:38,623 INFO L242 Difference]: Finished difference. Result has 253 places, 219 transitions, 498 flow [2022-07-22 21:33:38,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=498, PETRI_PLACES=253, PETRI_TRANSITIONS=219} [2022-07-22 21:33:38,624 INFO L279 CegarLoopForPetriNet]: 253 programPoint places, 0 predicate places. [2022-07-22 21:33:38,624 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 219 transitions, 498 flow [2022-07-22 21:33:38,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 233.5) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,624 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:38,625 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:38,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:33:38,625 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:38,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:38,625 INFO L85 PathProgramCache]: Analyzing trace with hash 878298084, now seen corresponding path program 1 times [2022-07-22 21:33:38,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:38,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431036981] [2022-07-22 21:33:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:38,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:38,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:38,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431036981] [2022-07-22 21:33:38,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431036981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:38,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:38,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:38,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607775989] [2022-07-22 21:33:38,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:38,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:38,647 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 287 [2022-07-22 21:33:38,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 219 transitions, 498 flow. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:38,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 287 [2022-07-22 21:33:38,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:38,710 INFO L129 PetriNetUnfolder]: 0/328 cut-off events. [2022-07-22 21:33:38,710 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-22 21:33:38,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 328 events. 0/328 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 919 event pairs, 0 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-22 21:33:38,712 INFO L132 encePairwiseOnDemand]: 284/287 looper letters, 15 selfloop transitions, 2 changer transitions 0/223 dead transitions. [2022-07-22 21:33:38,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 223 transitions, 540 flow [2022-07-22 21:33:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:38,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2022-07-22 21:33:38,714 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8083623693379791 [2022-07-22 21:33:38,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2022-07-22 21:33:38,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2022-07-22 21:33:38,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:38,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2022-07-22 21:33:38,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,718 INFO L186 Difference]: Start difference. First operand has 253 places, 219 transitions, 498 flow. Second operand 3 states and 696 transitions. [2022-07-22 21:33:38,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 223 transitions, 540 flow [2022-07-22 21:33:38,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 223 transitions, 510 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:38,722 INFO L242 Difference]: Finished difference. Result has 236 places, 220 transitions, 480 flow [2022-07-22 21:33:38,722 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=480, PETRI_PLACES=236, PETRI_TRANSITIONS=220} [2022-07-22 21:33:38,722 INFO L279 CegarLoopForPetriNet]: 253 programPoint places, -17 predicate places. [2022-07-22 21:33:38,723 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 220 transitions, 480 flow [2022-07-22 21:33:38,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,723 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:38,723 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:38,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 21:33:38,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1650337047, now seen corresponding path program 1 times [2022-07-22 21:33:38,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:38,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962726331] [2022-07-22 21:33:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:38,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:38,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:38,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962726331] [2022-07-22 21:33:38,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962726331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:38,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977519793] [2022-07-22 21:33:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:38,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:38,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:38,760 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) [2022-07-22 21:33:38,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:33:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:38,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:38,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:38,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:38,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977519793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:38,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:38,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:38,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700081914] [2022-07-22 21:33:38,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:38,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:38,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:38,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:38,912 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 287 [2022-07-22 21:33:38,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 220 transitions, 480 flow. Second operand has 10 states, 10 states have (on average 227.3) internal successors, (2273), 10 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:38,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:38,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 287 [2022-07-22 21:33:38,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:39,031 INFO L129 PetriNetUnfolder]: 0/304 cut-off events. [2022-07-22 21:33:39,031 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:33:39,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 304 events. 0/304 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 779 event pairs, 0 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-22 21:33:39,033 INFO L132 encePairwiseOnDemand]: 281/287 looper letters, 16 selfloop transitions, 9 changer transitions 0/230 dead transitions. [2022-07-22 21:33:39,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 230 transitions, 552 flow [2022-07-22 21:33:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2052 transitions. [2022-07-22 21:33:39,037 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.794425087108014 [2022-07-22 21:33:39,037 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2052 transitions. [2022-07-22 21:33:39,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2052 transitions. [2022-07-22 21:33:39,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:39,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2052 transitions. [2022-07-22 21:33:39,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:39,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 287.0) internal successors, (2870), 10 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:39,047 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 287.0) internal successors, (2870), 10 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:39,047 INFO L186 Difference]: Start difference. First operand has 236 places, 220 transitions, 480 flow. Second operand 9 states and 2052 transitions. [2022-07-22 21:33:39,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 230 transitions, 552 flow [2022-07-22 21:33:39,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 230 transitions, 550 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:39,052 INFO L242 Difference]: Finished difference. Result has 246 places, 226 transitions, 528 flow [2022-07-22 21:33:39,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=246, PETRI_TRANSITIONS=226} [2022-07-22 21:33:39,053 INFO L279 CegarLoopForPetriNet]: 253 programPoint places, -7 predicate places. [2022-07-22 21:33:39,053 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 226 transitions, 528 flow [2022-07-22 21:33:39,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 227.3) internal successors, (2273), 10 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:39,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:39,054 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:39,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:39,279 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 [2022-07-22 21:33:39,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash -306651696, now seen corresponding path program 1 times [2022-07-22 21:33:39,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:39,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933530213] [2022-07-22 21:33:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:39,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:39,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:39,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933530213] [2022-07-22 21:33:39,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933530213] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:39,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825621700] [2022-07-22 21:33:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:39,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:39,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:39,348 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) [2022-07-22 21:33:39,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:33:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:39,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:33:39,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:39,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:39,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825621700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:39,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:39,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:33:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268124650] [2022-07-22 21:33:39,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:39,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:33:39,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:39,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:33:39,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:33:39,606 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 287 [2022-07-22 21:33:39,608 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 226 transitions, 528 flow. Second operand has 18 states, 18 states have (on average 227.61111111111111) internal successors, (4097), 18 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:39,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:39,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 287 [2022-07-22 21:33:39,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:39,807 INFO L129 PetriNetUnfolder]: 0/256 cut-off events. [2022-07-22 21:33:39,807 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:33:39,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 256 events. 0/256 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. 4/260 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-22 21:33:39,808 INFO L132 encePairwiseOnDemand]: 282/287 looper letters, 21 selfloop transitions, 19 changer transitions 0/234 dead transitions. [2022-07-22 21:33:39,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 234 transitions, 664 flow [2022-07-22 21:33:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:33:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:33:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4769 transitions. [2022-07-22 21:33:39,815 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912726066036171 [2022-07-22 21:33:39,815 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4769 transitions. [2022-07-22 21:33:39,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4769 transitions. [2022-07-22 21:33:39,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:39,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4769 transitions. [2022-07-22 21:33:39,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 227.0952380952381) internal successors, (4769), 21 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:39,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:39,857 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:39,858 INFO L186 Difference]: Start difference. First operand has 246 places, 226 transitions, 528 flow. Second operand 21 states and 4769 transitions. [2022-07-22 21:33:39,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 234 transitions, 664 flow [2022-07-22 21:33:39,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 234 transitions, 639 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-22 21:33:39,863 INFO L242 Difference]: Finished difference. Result has 250 places, 223 transitions, 562 flow [2022-07-22 21:33:39,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=562, PETRI_PLACES=250, PETRI_TRANSITIONS=223} [2022-07-22 21:33:39,864 INFO L279 CegarLoopForPetriNet]: 253 programPoint places, -3 predicate places. [2022-07-22 21:33:39,865 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 223 transitions, 562 flow [2022-07-22 21:33:39,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 227.61111111111111) internal successors, (4097), 18 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:39,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:39,866 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:39,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:40,091 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 [2022-07-22 21:33:40,092 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash 727495015, now seen corresponding path program 1 times [2022-07-22 21:33:40,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:40,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605501517] [2022-07-22 21:33:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:40,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:40,109 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:40,128 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:40,129 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:40,129 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:40,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:40,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 21:33:40,129 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 21:33:40,130 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:40,130 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-22 21:33:40,153 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-22 21:33:40,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 282 places, 321 transitions, 740 flow [2022-07-22 21:33:40,675 INFO L129 PetriNetUnfolder]: 530/2762 cut-off events. [2022-07-22 21:33:40,675 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-22 21:33:40,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 2762 events. 530/2762 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 18539 event pairs, 201 based on Foata normal form. 0/2416 useless extension candidates. Maximal degree in co-relation 1762. Up to 448 conditions per place. [2022-07-22 21:33:40,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 321 transitions, 740 flow [2022-07-22 21:33:40,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 321 transitions, 740 flow [2022-07-22 21:33:40,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:40,778 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:33:40,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:40,783 INFO L129 PetriNetUnfolder]: 5/87 cut-off events. [2022-07-22 21:33:40,783 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:40,783 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:40,783 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] [2022-07-22 21:33:40,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:40,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1331672858, now seen corresponding path program 1 times [2022-07-22 21:33:40,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:40,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424341334] [2022-07-22 21:33:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:40,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:40,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:40,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424341334] [2022-07-22 21:33:40,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424341334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:40,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:40,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:33:40,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350207168] [2022-07-22 21:33:40,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:40,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:33:40,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:40,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:33:40,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:33:40,803 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 321 [2022-07-22 21:33:40,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 321 transitions, 740 flow. Second operand has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:40,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:40,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 321 [2022-07-22 21:33:40,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:41,408 INFO L129 PetriNetUnfolder]: 328/2552 cut-off events. [2022-07-22 21:33:41,409 INFO L130 PetriNetUnfolder]: For 1453/1481 co-relation queries the response was YES. [2022-07-22 21:33:41,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 2552 events. 328/2552 cut-off events. For 1453/1481 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 18097 event pairs, 201 based on Foata normal form. 2940/5348 useless extension candidates. Maximal degree in co-relation 1825. Up to 456 conditions per place. [2022-07-22 21:33:41,437 INFO L132 encePairwiseOnDemand]: 274/321 looper letters, 7 selfloop transitions, 0 changer transitions 27/273 dead transitions. [2022-07-22 21:33:41,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 273 transitions, 672 flow [2022-07-22 21:33:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:33:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:33:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 579 transitions. [2022-07-22 21:33:41,439 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9018691588785047 [2022-07-22 21:33:41,439 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 579 transitions. [2022-07-22 21:33:41,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 579 transitions. [2022-07-22 21:33:41,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:41,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 579 transitions. [2022-07-22 21:33:41,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 289.5) internal successors, (579), 2 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,442 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,442 INFO L186 Difference]: Start difference. First operand has 282 places, 321 transitions, 740 flow. Second operand 2 states and 579 transitions. [2022-07-22 21:33:41,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 273 transitions, 672 flow [2022-07-22 21:33:41,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 273 transitions, 672 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:41,448 INFO L242 Difference]: Finished difference. Result has 282 places, 246 transitions, 569 flow [2022-07-22 21:33:41,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=569, PETRI_PLACES=282, PETRI_TRANSITIONS=246} [2022-07-22 21:33:41,449 INFO L279 CegarLoopForPetriNet]: 282 programPoint places, 0 predicate places. [2022-07-22 21:33:41,449 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 246 transitions, 569 flow [2022-07-22 21:33:41,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,449 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:41,450 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] [2022-07-22 21:33:41,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 21:33:41,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1202590139, now seen corresponding path program 1 times [2022-07-22 21:33:41,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:41,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186169185] [2022-07-22 21:33:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:41,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:41,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:41,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186169185] [2022-07-22 21:33:41,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186169185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:41,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:41,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:41,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146516664] [2022-07-22 21:33:41,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:41,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:41,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:41,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 321 [2022-07-22 21:33:41,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 246 transitions, 569 flow. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:41,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 321 [2022-07-22 21:33:41,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:41,551 INFO L129 PetriNetUnfolder]: 0/376 cut-off events. [2022-07-22 21:33:41,551 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-22 21:33:41,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 376 events. 0/376 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1096 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-22 21:33:41,553 INFO L132 encePairwiseOnDemand]: 318/321 looper letters, 16 selfloop transitions, 2 changer transitions 0/250 dead transitions. [2022-07-22 21:33:41,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 250 transitions, 613 flow [2022-07-22 21:33:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2022-07-22 21:33:41,555 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8047767393561787 [2022-07-22 21:33:41,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2022-07-22 21:33:41,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2022-07-22 21:33:41,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:41,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2022-07-22 21:33:41,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,561 INFO L186 Difference]: Start difference. First operand has 282 places, 246 transitions, 569 flow. Second operand 3 states and 775 transitions. [2022-07-22 21:33:41,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 250 transitions, 613 flow [2022-07-22 21:33:41,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 250 transitions, 571 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:41,566 INFO L242 Difference]: Finished difference. Result has 265 places, 247 transitions, 539 flow [2022-07-22 21:33:41,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=539, PETRI_PLACES=265, PETRI_TRANSITIONS=247} [2022-07-22 21:33:41,566 INFO L279 CegarLoopForPetriNet]: 282 programPoint places, -17 predicate places. [2022-07-22 21:33:41,567 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 247 transitions, 539 flow [2022-07-22 21:33:41,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,567 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:41,567 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, 1] [2022-07-22 21:33:41,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 21:33:41,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash 331807882, now seen corresponding path program 1 times [2022-07-22 21:33:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:41,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695279270] [2022-07-22 21:33:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:41,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:41,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:41,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695279270] [2022-07-22 21:33:41,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695279270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:41,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647236701] [2022-07-22 21:33:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:41,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:41,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:41,606 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) [2022-07-22 21:33:41,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:33:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:41,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:41,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:41,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:41,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647236701] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:41,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:41,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:41,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51075369] [2022-07-22 21:33:41,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:41,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:41,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:41,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:41,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:41,770 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 321 [2022-07-22 21:33:41,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 247 transitions, 539 flow. Second operand has 10 states, 10 states have (on average 253.3) internal successors, (2533), 10 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:41,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 321 [2022-07-22 21:33:41,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:41,924 INFO L129 PetriNetUnfolder]: 0/352 cut-off events. [2022-07-22 21:33:41,924 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-22 21:33:41,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 352 events. 0/352 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 952 event pairs, 0 based on Foata normal form. 2/354 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-22 21:33:41,926 INFO L132 encePairwiseOnDemand]: 315/321 looper letters, 17 selfloop transitions, 9 changer transitions 0/257 dead transitions. [2022-07-22 21:33:41,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 257 transitions, 613 flow [2022-07-22 21:33:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2287 transitions. [2022-07-22 21:33:41,930 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916233991000347 [2022-07-22 21:33:41,930 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2287 transitions. [2022-07-22 21:33:41,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2287 transitions. [2022-07-22 21:33:41,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:41,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2287 transitions. [2022-07-22 21:33:41,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 254.11111111111111) internal successors, (2287), 9 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,941 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,941 INFO L186 Difference]: Start difference. First operand has 265 places, 247 transitions, 539 flow. Second operand 9 states and 2287 transitions. [2022-07-22 21:33:41,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 257 transitions, 613 flow [2022-07-22 21:33:41,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 257 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:41,946 INFO L242 Difference]: Finished difference. Result has 275 places, 253 transitions, 587 flow [2022-07-22 21:33:41,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=587, PETRI_PLACES=275, PETRI_TRANSITIONS=253} [2022-07-22 21:33:41,947 INFO L279 CegarLoopForPetriNet]: 282 programPoint places, -7 predicate places. [2022-07-22 21:33:41,947 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 253 transitions, 587 flow [2022-07-22 21:33:41,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 253.3) internal successors, (2533), 10 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:41,948 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:41,949 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:41,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:42,172 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,SelfDestructingSolverStorable26 [2022-07-22 21:33:42,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:42,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1341636081, now seen corresponding path program 1 times [2022-07-22 21:33:42,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:42,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782840624] [2022-07-22 21:33:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:42,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:42,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:42,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782840624] [2022-07-22 21:33:42,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782840624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:42,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467196128] [2022-07-22 21:33:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:42,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:42,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:42,240 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) [2022-07-22 21:33:42,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:33:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:42,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:33:42,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:42,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:42,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467196128] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:42,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:42,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:33:42,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918697864] [2022-07-22 21:33:42,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:42,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:33:42,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:42,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:33:42,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:33:42,525 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 321 [2022-07-22 21:33:42,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 253 transitions, 587 flow. Second operand has 18 states, 18 states have (on average 253.61111111111111) internal successors, (4565), 18 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:42,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:42,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 321 [2022-07-22 21:33:42,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:42,766 INFO L129 PetriNetUnfolder]: 0/304 cut-off events. [2022-07-22 21:33:42,766 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-22 21:33:42,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 304 events. 0/304 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 637 event pairs, 0 based on Foata normal form. 4/308 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-22 21:33:42,767 INFO L132 encePairwiseOnDemand]: 315/321 looper letters, 25 selfloop transitions, 21 changer transitions 0/277 dead transitions. [2022-07-22 21:33:42,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 277 transitions, 787 flow [2022-07-22 21:33:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:33:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:33:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5321 transitions. [2022-07-22 21:33:42,773 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7893487613113781 [2022-07-22 21:33:42,774 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5321 transitions. [2022-07-22 21:33:42,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5321 transitions. [2022-07-22 21:33:42,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:42,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5321 transitions. [2022-07-22 21:33:42,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 253.38095238095238) internal successors, (5321), 21 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:42,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:42,791 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:42,791 INFO L186 Difference]: Start difference. First operand has 275 places, 253 transitions, 587 flow. Second operand 21 states and 5321 transitions. [2022-07-22 21:33:42,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 277 transitions, 787 flow [2022-07-22 21:33:42,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 277 transitions, 773 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:42,798 INFO L242 Difference]: Finished difference. Result has 299 places, 266 transitions, 711 flow [2022-07-22 21:33:42,799 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=711, PETRI_PLACES=299, PETRI_TRANSITIONS=266} [2022-07-22 21:33:42,799 INFO L279 CegarLoopForPetriNet]: 282 programPoint places, 17 predicate places. [2022-07-22 21:33:42,800 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 266 transitions, 711 flow [2022-07-22 21:33:42,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 253.61111111111111) internal successors, (4565), 18 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:42,801 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:42,801 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:42,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:43,023 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,SelfDestructingSolverStorable27 [2022-07-22 21:33:43,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:43,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1703140056, now seen corresponding path program 1 times [2022-07-22 21:33:43,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:43,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898414960] [2022-07-22 21:33:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:43,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:43,049 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:43,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:43,084 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:43,084 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:43,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:43,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 21:33:43,084 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 21:33:43,085 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:43,085 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-22 21:33:43,134 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-22 21:33:43,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 311 places, 355 transitions, 830 flow [2022-07-22 21:33:44,281 INFO L129 PetriNetUnfolder]: 1117/5196 cut-off events. [2022-07-22 21:33:44,281 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-22 21:33:44,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6281 conditions, 5196 events. 1117/5196 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 41677 event pairs, 522 based on Foata normal form. 0/4582 useless extension candidates. Maximal degree in co-relation 3244. Up to 1024 conditions per place. [2022-07-22 21:33:44,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 355 transitions, 830 flow [2022-07-22 21:33:44,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 311 places, 355 transitions, 830 flow [2022-07-22 21:33:44,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:44,437 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:33:44,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:44,441 INFO L129 PetriNetUnfolder]: 6/92 cut-off events. [2022-07-22 21:33:44,441 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:44,441 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:44,442 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] [2022-07-22 21:33:44,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:44,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:44,442 INFO L85 PathProgramCache]: Analyzing trace with hash -595715671, now seen corresponding path program 1 times [2022-07-22 21:33:44,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:44,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610124624] [2022-07-22 21:33:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:44,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:44,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:44,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610124624] [2022-07-22 21:33:44,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610124624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:44,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:44,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:33:44,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730916000] [2022-07-22 21:33:44,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:44,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:33:44,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:44,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:33:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:33:44,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 355 [2022-07-22 21:33:44,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 355 transitions, 830 flow. Second operand has 2 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:44,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:44,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 355 [2022-07-22 21:33:44,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:45,598 INFO L129 PetriNetUnfolder]: 777/4847 cut-off events. [2022-07-22 21:33:45,598 INFO L130 PetriNetUnfolder]: For 3234/3284 co-relation queries the response was YES. [2022-07-22 21:33:45,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6965 conditions, 4847 events. 777/4847 cut-off events. For 3234/3284 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40419 event pairs, 522 based on Foata normal form. 6564/11137 useless extension candidates. Maximal degree in co-relation 3489. Up to 1033 conditions per place. [2022-07-22 21:33:45,658 INFO L132 encePairwiseOnDemand]: 302/355 looper letters, 8 selfloop transitions, 0 changer transitions 28/301 dead transitions. [2022-07-22 21:33:45,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 301 transitions, 754 flow [2022-07-22 21:33:45,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:33:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:33:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 639 transitions. [2022-07-22 21:33:45,660 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-22 21:33:45,660 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 639 transitions. [2022-07-22 21:33:45,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 639 transitions. [2022-07-22 21:33:45,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:45,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 639 transitions. [2022-07-22 21:33:45,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 319.5) internal successors, (639), 2 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:45,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:45,663 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:45,663 INFO L186 Difference]: Start difference. First operand has 311 places, 355 transitions, 830 flow. Second operand 2 states and 639 transitions. [2022-07-22 21:33:45,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 301 transitions, 754 flow [2022-07-22 21:33:45,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 301 transitions, 754 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:45,670 INFO L242 Difference]: Finished difference. Result has 311 places, 273 transitions, 642 flow [2022-07-22 21:33:45,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=642, PETRI_PLACES=311, PETRI_TRANSITIONS=273} [2022-07-22 21:33:45,671 INFO L279 CegarLoopForPetriNet]: 311 programPoint places, 0 predicate places. [2022-07-22 21:33:45,671 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 273 transitions, 642 flow [2022-07-22 21:33:45,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:45,671 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:45,671 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] [2022-07-22 21:33:45,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 21:33:45,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash -466632952, now seen corresponding path program 1 times [2022-07-22 21:33:45,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:45,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521523919] [2022-07-22 21:33:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:45,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:45,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:45,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521523919] [2022-07-22 21:33:45,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521523919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:45,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:45,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336485799] [2022-07-22 21:33:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:45,693 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 355 [2022-07-22 21:33:45,694 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 273 transitions, 642 flow. Second operand has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:45,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:45,694 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 355 [2022-07-22 21:33:45,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:45,792 INFO L129 PetriNetUnfolder]: 0/424 cut-off events. [2022-07-22 21:33:45,793 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-22 21:33:45,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 424 events. 0/424 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1274 event pairs, 0 based on Foata normal form. 0/416 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-22 21:33:45,794 INFO L132 encePairwiseOnDemand]: 352/355 looper letters, 17 selfloop transitions, 2 changer transitions 0/277 dead transitions. [2022-07-22 21:33:45,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 277 transitions, 688 flow [2022-07-22 21:33:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 854 transitions. [2022-07-22 21:33:45,797 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8018779342723005 [2022-07-22 21:33:45,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 854 transitions. [2022-07-22 21:33:45,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 854 transitions. [2022-07-22 21:33:45,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:45,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 854 transitions. [2022-07-22 21:33:45,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:45,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:45,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:45,800 INFO L186 Difference]: Start difference. First operand has 311 places, 273 transitions, 642 flow. Second operand 3 states and 854 transitions. [2022-07-22 21:33:45,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 277 transitions, 688 flow [2022-07-22 21:33:45,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 277 transitions, 632 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:45,806 INFO L242 Difference]: Finished difference. Result has 294 places, 274 transitions, 598 flow [2022-07-22 21:33:45,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=598, PETRI_PLACES=294, PETRI_TRANSITIONS=274} [2022-07-22 21:33:45,807 INFO L279 CegarLoopForPetriNet]: 311 programPoint places, -17 predicate places. [2022-07-22 21:33:45,807 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 274 transitions, 598 flow [2022-07-22 21:33:45,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:45,808 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:45,808 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:45,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 21:33:45,809 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash -733075635, now seen corresponding path program 1 times [2022-07-22 21:33:45,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:45,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674162815] [2022-07-22 21:33:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:45,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:45,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:45,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674162815] [2022-07-22 21:33:45,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674162815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:45,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543585168] [2022-07-22 21:33:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:45,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:45,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:45,848 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) [2022-07-22 21:33:45,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:33:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:45,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:45,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:45,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:46,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543585168] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:46,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:46,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:46,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52275232] [2022-07-22 21:33:46,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:46,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:46,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:46,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:46,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:46,033 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 355 [2022-07-22 21:33:46,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 274 transitions, 598 flow. Second operand has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:46,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:46,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 355 [2022-07-22 21:33:46,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:46,249 INFO L129 PetriNetUnfolder]: 0/400 cut-off events. [2022-07-22 21:33:46,250 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:33:46,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 400 events. 0/400 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1132 event pairs, 0 based on Foata normal form. 2/402 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-22 21:33:46,250 INFO L132 encePairwiseOnDemand]: 349/355 looper letters, 18 selfloop transitions, 9 changer transitions 0/284 dead transitions. [2022-07-22 21:33:46,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 284 transitions, 674 flow [2022-07-22 21:33:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2522 transitions. [2022-07-22 21:33:46,253 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.789358372456964 [2022-07-22 21:33:46,253 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2522 transitions. [2022-07-22 21:33:46,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2522 transitions. [2022-07-22 21:33:46,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:46,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2522 transitions. [2022-07-22 21:33:46,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.22222222222223) internal successors, (2522), 9 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:46,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:46,259 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:46,260 INFO L186 Difference]: Start difference. First operand has 294 places, 274 transitions, 598 flow. Second operand 9 states and 2522 transitions. [2022-07-22 21:33:46,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 284 transitions, 674 flow [2022-07-22 21:33:46,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 284 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:46,265 INFO L242 Difference]: Finished difference. Result has 304 places, 280 transitions, 646 flow [2022-07-22 21:33:46,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=646, PETRI_PLACES=304, PETRI_TRANSITIONS=280} [2022-07-22 21:33:46,266 INFO L279 CegarLoopForPetriNet]: 311 programPoint places, -7 predicate places. [2022-07-22 21:33:46,266 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 280 transitions, 646 flow [2022-07-22 21:33:46,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:46,267 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:46,267 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:46,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:46,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-22 21:33:46,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2033720500, now seen corresponding path program 1 times [2022-07-22 21:33:46,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:46,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555117469] [2022-07-22 21:33:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:46,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:46,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:46,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555117469] [2022-07-22 21:33:46,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555117469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:46,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449960643] [2022-07-22 21:33:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:46,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:46,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:46,559 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) [2022-07-22 21:33:46,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:33:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:33:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:46,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:46,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449960643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:46,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:46,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:33:46,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670617142] [2022-07-22 21:33:46,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:46,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:33:46,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:46,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:33:46,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:33:46,826 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 355 [2022-07-22 21:33:46,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 280 transitions, 646 flow. Second operand has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:46,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:46,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 355 [2022-07-22 21:33:46,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:47,065 INFO L129 PetriNetUnfolder]: 0/352 cut-off events. [2022-07-22 21:33:47,065 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-22 21:33:47,066 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 814 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. [2022-07-22 21:33:47,067 INFO L132 encePairwiseOnDemand]: 349/355 looper letters, 26 selfloop transitions, 21 changer transitions 0/304 dead transitions. [2022-07-22 21:33:47,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 304 transitions, 848 flow [2022-07-22 21:33:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:33:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:33:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5868 transitions. [2022-07-22 21:33:47,072 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.787122736418511 [2022-07-22 21:33:47,072 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5868 transitions. [2022-07-22 21:33:47,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5868 transitions. [2022-07-22 21:33:47,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:47,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5868 transitions. [2022-07-22 21:33:47,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 279.42857142857144) internal successors, (5868), 21 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:47,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:47,090 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:47,090 INFO L186 Difference]: Start difference. First operand has 304 places, 280 transitions, 646 flow. Second operand 21 states and 5868 transitions. [2022-07-22 21:33:47,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 304 transitions, 848 flow [2022-07-22 21:33:47,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 304 transitions, 834 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:47,096 INFO L242 Difference]: Finished difference. Result has 328 places, 293 transitions, 770 flow [2022-07-22 21:33:47,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=770, PETRI_PLACES=328, PETRI_TRANSITIONS=293} [2022-07-22 21:33:47,097 INFO L279 CegarLoopForPetriNet]: 311 programPoint places, 17 predicate places. [2022-07-22 21:33:47,097 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 293 transitions, 770 flow [2022-07-22 21:33:47,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:47,098 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:47,098 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:47,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:47,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-22 21:33:47,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:47,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1251426826, now seen corresponding path program 1 times [2022-07-22 21:33:47,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:47,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043976804] [2022-07-22 21:33:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:47,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:47,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:47,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043976804] [2022-07-22 21:33:47,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043976804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:47,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452885877] [2022-07-22 21:33:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:47,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:47,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:47,489 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) [2022-07-22 21:33:47,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 21:33:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:47,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:33:47,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:47,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:48,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452885877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:48,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:48,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-22 21:33:48,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022622066] [2022-07-22 21:33:48,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:33:48,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:48,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:33:48,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:33:48,035 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 355 [2022-07-22 21:33:48,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 293 transitions, 770 flow. Second operand has 34 states, 34 states have (on average 279.79411764705884) internal successors, (9513), 34 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:48,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:48,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 355 [2022-07-22 21:33:48,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:48,337 INFO L129 PetriNetUnfolder]: 0/328 cut-off events. [2022-07-22 21:33:48,338 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-22 21:33:48,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 328 events. 0/328 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. 2/330 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-22 21:33:48,339 INFO L132 encePairwiseOnDemand]: 350/355 looper letters, 27 selfloop transitions, 25 changer transitions 0/298 dead transitions. [2022-07-22 21:33:48,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 298 transitions, 916 flow [2022-07-22 21:33:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 21:33:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-22 21:33:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7533 transitions. [2022-07-22 21:33:48,346 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7859154929577464 [2022-07-22 21:33:48,346 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7533 transitions. [2022-07-22 21:33:48,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7533 transitions. [2022-07-22 21:33:48,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:48,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7533 transitions. [2022-07-22 21:33:48,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 279.0) internal successors, (7533), 27 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:48,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 355.0) internal successors, (9940), 28 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:48,364 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 355.0) internal successors, (9940), 28 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:48,365 INFO L186 Difference]: Start difference. First operand has 328 places, 293 transitions, 770 flow. Second operand 27 states and 7533 transitions. [2022-07-22 21:33:48,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 298 transitions, 916 flow [2022-07-22 21:33:48,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 298 transitions, 862 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-22 21:33:48,371 INFO L242 Difference]: Finished difference. Result has 329 places, 284 transitions, 755 flow [2022-07-22 21:33:48,371 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=755, PETRI_PLACES=329, PETRI_TRANSITIONS=284} [2022-07-22 21:33:48,372 INFO L279 CegarLoopForPetriNet]: 311 programPoint places, 18 predicate places. [2022-07-22 21:33:48,372 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 284 transitions, 755 flow [2022-07-22 21:33:48,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 279.79411764705884) internal successors, (9513), 34 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:48,373 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:48,374 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:48,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:48,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-22 21:33:48,596 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash 681592554, now seen corresponding path program 1 times [2022-07-22 21:33:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:48,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029329311] [2022-07-22 21:33:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:48,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:48,620 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:48,650 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:48,651 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:48,652 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:48,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:48,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-22 21:33:48,652 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-22 21:33:48,654 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:48,654 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-22 21:33:48,683 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-22 21:33:48,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 340 places, 389 transitions, 922 flow [2022-07-22 21:33:50,870 INFO L129 PetriNetUnfolder]: 2408/10126 cut-off events. [2022-07-22 21:33:50,870 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-22 21:33:51,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12503 conditions, 10126 events. 2408/10126 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 93818 event pairs, 1291 based on Foata normal form. 0/8988 useless extension candidates. Maximal degree in co-relation 6263. Up to 2304 conditions per place. [2022-07-22 21:33:51,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 340 places, 389 transitions, 922 flow [2022-07-22 21:33:51,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 340 places, 389 transitions, 922 flow [2022-07-22 21:33:51,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:33:51,171 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:33:51,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:33:51,175 INFO L129 PetriNetUnfolder]: 6/93 cut-off events. [2022-07-22 21:33:51,175 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:33:51,175 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:51,176 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] [2022-07-22 21:33:51,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:51,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:51,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1337880370, now seen corresponding path program 1 times [2022-07-22 21:33:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:51,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456701556] [2022-07-22 21:33:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:51,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:51,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456701556] [2022-07-22 21:33:51,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456701556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:51,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:51,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:33:51,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915405326] [2022-07-22 21:33:51,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:51,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:33:51,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:51,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:33:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:33:51,192 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 389 [2022-07-22 21:33:51,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 389 transitions, 922 flow. Second operand has 2 states, 2 states have (on average 311.5) internal successors, (623), 2 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:51,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:51,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 389 [2022-07-22 21:33:51,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:53,557 INFO L129 PetriNetUnfolder]: 1802/9510 cut-off events. [2022-07-22 21:33:53,558 INFO L130 PetriNetUnfolder]: For 7122/7170 co-relation queries the response was YES. [2022-07-22 21:33:53,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14201 conditions, 9510 events. 1802/9510 cut-off events. For 7122/7170 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 91573 event pairs, 1291 based on Foata normal form. 14546/23524 useless extension candidates. Maximal degree in co-relation 6946. Up to 2314 conditions per place. [2022-07-22 21:33:53,653 INFO L132 encePairwiseOnDemand]: 330/389 looper letters, 9 selfloop transitions, 0 changer transitions 29/329 dead transitions. [2022-07-22 21:33:53,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 329 transitions, 838 flow [2022-07-22 21:33:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:33:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:33:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 699 transitions. [2022-07-22 21:33:53,655 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8984575835475579 [2022-07-22 21:33:53,656 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 699 transitions. [2022-07-22 21:33:53,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 699 transitions. [2022-07-22 21:33:53,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:53,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 699 transitions. [2022-07-22 21:33:53,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:53,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:53,658 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:53,659 INFO L186 Difference]: Start difference. First operand has 340 places, 389 transitions, 922 flow. Second operand 2 states and 699 transitions. [2022-07-22 21:33:53,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 329 transitions, 838 flow [2022-07-22 21:33:53,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 329 transitions, 838 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:53,668 INFO L242 Difference]: Finished difference. Result has 340 places, 300 transitions, 717 flow [2022-07-22 21:33:53,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=717, PETRI_PLACES=340, PETRI_TRANSITIONS=300} [2022-07-22 21:33:53,669 INFO L279 CegarLoopForPetriNet]: 340 programPoint places, 0 predicate places. [2022-07-22 21:33:53,669 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 300 transitions, 717 flow [2022-07-22 21:33:53,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 311.5) internal successors, (623), 2 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:53,669 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:53,669 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] [2022-07-22 21:33:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-22 21:33:53,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:53,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:53,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1208797651, now seen corresponding path program 1 times [2022-07-22 21:33:53,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:53,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784033834] [2022-07-22 21:33:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:53,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:53,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784033834] [2022-07-22 21:33:53,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784033834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:33:53,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:33:53,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:33:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74074095] [2022-07-22 21:33:53,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:33:53,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:33:53,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:53,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:33:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:33:53,690 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 389 [2022-07-22 21:33:53,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 300 transitions, 717 flow. Second operand has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:53,691 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:53,691 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 389 [2022-07-22 21:33:53,691 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:53,814 INFO L129 PetriNetUnfolder]: 0/472 cut-off events. [2022-07-22 21:33:53,815 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-22 21:33:53,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 472 events. 0/472 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1450 event pairs, 0 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-22 21:33:53,817 INFO L132 encePairwiseOnDemand]: 386/389 looper letters, 18 selfloop transitions, 2 changer transitions 0/304 dead transitions. [2022-07-22 21:33:53,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 304 transitions, 765 flow [2022-07-22 21:33:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:33:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:33:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 933 transitions. [2022-07-22 21:33:53,819 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7994858611825193 [2022-07-22 21:33:53,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 933 transitions. [2022-07-22 21:33:53,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 933 transitions. [2022-07-22 21:33:53,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:53,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 933 transitions. [2022-07-22 21:33:53,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:53,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:53,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:53,823 INFO L186 Difference]: Start difference. First operand has 340 places, 300 transitions, 717 flow. Second operand 3 states and 933 transitions. [2022-07-22 21:33:53,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 304 transitions, 765 flow [2022-07-22 21:33:53,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 304 transitions, 693 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-22 21:33:53,829 INFO L242 Difference]: Finished difference. Result has 323 places, 301 transitions, 657 flow [2022-07-22 21:33:53,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=657, PETRI_PLACES=323, PETRI_TRANSITIONS=301} [2022-07-22 21:33:53,830 INFO L279 CegarLoopForPetriNet]: 340 programPoint places, -17 predicate places. [2022-07-22 21:33:53,830 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 301 transitions, 657 flow [2022-07-22 21:33:53,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:53,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:53,831 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:53,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-22 21:33:53,831 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash -550020302, now seen corresponding path program 1 times [2022-07-22 21:33:53,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:53,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415027006] [2022-07-22 21:33:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:53,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:53,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415027006] [2022-07-22 21:33:53,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415027006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:53,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839658568] [2022-07-22 21:33:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:53,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:53,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:53,863 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) [2022-07-22 21:33:53,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 21:33:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:33:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:54,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:54,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839658568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:54,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:54,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:33:54,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775119981] [2022-07-22 21:33:54,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:54,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:33:54,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:54,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:33:54,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:33:54,074 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 389 [2022-07-22 21:33:54,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 301 transitions, 657 flow. Second operand has 10 states, 10 states have (on average 305.3) internal successors, (3053), 10 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:54,076 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:54,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 389 [2022-07-22 21:33:54,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:54,302 INFO L129 PetriNetUnfolder]: 0/448 cut-off events. [2022-07-22 21:33:54,302 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-22 21:33:54,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 448 events. 0/448 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1307 event pairs, 0 based on Foata normal form. 2/450 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-22 21:33:54,303 INFO L132 encePairwiseOnDemand]: 383/389 looper letters, 19 selfloop transitions, 9 changer transitions 0/311 dead transitions. [2022-07-22 21:33:54,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 311 transitions, 735 flow [2022-07-22 21:33:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:33:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:33:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2757 transitions. [2022-07-22 21:33:54,307 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7874892887746359 [2022-07-22 21:33:54,307 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2757 transitions. [2022-07-22 21:33:54,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2757 transitions. [2022-07-22 21:33:54,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:54,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2757 transitions. [2022-07-22 21:33:54,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 306.3333333333333) internal successors, (2757), 9 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:54,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 389.0) internal successors, (3890), 10 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:54,314 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 389.0) internal successors, (3890), 10 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:54,314 INFO L186 Difference]: Start difference. First operand has 323 places, 301 transitions, 657 flow. Second operand 9 states and 2757 transitions. [2022-07-22 21:33:54,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 311 transitions, 735 flow [2022-07-22 21:33:54,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 311 transitions, 733 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:54,320 INFO L242 Difference]: Finished difference. Result has 333 places, 307 transitions, 705 flow [2022-07-22 21:33:54,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=705, PETRI_PLACES=333, PETRI_TRANSITIONS=307} [2022-07-22 21:33:54,321 INFO L279 CegarLoopForPetriNet]: 340 programPoint places, -7 predicate places. [2022-07-22 21:33:54,321 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 307 transitions, 705 flow [2022-07-22 21:33:54,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 305.3) internal successors, (3053), 10 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:54,322 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:54,322 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:54,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-22 21:33:54,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:54,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1769601561, now seen corresponding path program 1 times [2022-07-22 21:33:54,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:54,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376269442] [2022-07-22 21:33:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:54,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:54,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:54,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376269442] [2022-07-22 21:33:54,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376269442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:54,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455945765] [2022-07-22 21:33:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:54,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:54,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:54,600 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) [2022-07-22 21:33:54,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 21:33:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:33:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:54,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:54,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455945765] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:54,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:54,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:33:54,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997510192] [2022-07-22 21:33:54,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:54,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:33:54,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:54,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:33:54,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:33:54,912 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 389 [2022-07-22 21:33:54,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 307 transitions, 705 flow. Second operand has 18 states, 18 states have (on average 305.6111111111111) internal successors, (5501), 18 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:54,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:54,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 389 [2022-07-22 21:33:54,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:55,119 INFO L129 PetriNetUnfolder]: 0/400 cut-off events. [2022-07-22 21:33:55,120 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-22 21:33:55,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 400 events. 0/400 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 991 event pairs, 0 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-22 21:33:55,121 INFO L132 encePairwiseOnDemand]: 383/389 looper letters, 27 selfloop transitions, 21 changer transitions 0/331 dead transitions. [2022-07-22 21:33:55,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 331 transitions, 909 flow [2022-07-22 21:33:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:33:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:33:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6415 transitions. [2022-07-22 21:33:55,126 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7852858366997184 [2022-07-22 21:33:55,126 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6415 transitions. [2022-07-22 21:33:55,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6415 transitions. [2022-07-22 21:33:55,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:55,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6415 transitions. [2022-07-22 21:33:55,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 305.4761904761905) internal successors, (6415), 21 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:55,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:55,143 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:55,143 INFO L186 Difference]: Start difference. First operand has 333 places, 307 transitions, 705 flow. Second operand 21 states and 6415 transitions. [2022-07-22 21:33:55,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 331 transitions, 909 flow [2022-07-22 21:33:55,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 331 transitions, 895 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:33:55,150 INFO L242 Difference]: Finished difference. Result has 357 places, 320 transitions, 829 flow [2022-07-22 21:33:55,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=829, PETRI_PLACES=357, PETRI_TRANSITIONS=320} [2022-07-22 21:33:55,151 INFO L279 CegarLoopForPetriNet]: 340 programPoint places, 17 predicate places. [2022-07-22 21:33:55,151 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 320 transitions, 829 flow [2022-07-22 21:33:55,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 305.6111111111111) internal successors, (5501), 18 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:55,152 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:55,152 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:55,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:55,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-22 21:33:55,371 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1868607067, now seen corresponding path program 1 times [2022-07-22 21:33:55,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:55,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865619729] [2022-07-22 21:33:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:55,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:55,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:33:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865619729] [2022-07-22 21:33:55,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865619729] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:33:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822846774] [2022-07-22 21:33:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:55,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:33:55,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:33:55,526 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) [2022-07-22 21:33:55,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 21:33:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:33:55,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:33:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:33:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:55,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:33:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:33:56,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822846774] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:33:56,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:33:56,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-22 21:33:56,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915809575] [2022-07-22 21:33:56,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:33:56,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:33:56,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:33:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:33:56,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:33:56,079 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 389 [2022-07-22 21:33:56,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 320 transitions, 829 flow. Second operand has 34 states, 34 states have (on average 305.79411764705884) internal successors, (10397), 34 states have internal predecessors, (10397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:56,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:33:56,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 389 [2022-07-22 21:33:56,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:33:56,413 INFO L129 PetriNetUnfolder]: 0/364 cut-off events. [2022-07-22 21:33:56,413 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-22 21:33:56,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 364 events. 0/364 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. 3/367 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-22 21:33:56,415 INFO L132 encePairwiseOnDemand]: 384/389 looper letters, 30 selfloop transitions, 28 changer transitions 0/330 dead transitions. [2022-07-22 21:33:56,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 330 transitions, 1021 flow [2022-07-22 21:33:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:33:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:33:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9151 transitions. [2022-07-22 21:33:56,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7841473864610111 [2022-07-22 21:33:56,423 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9151 transitions. [2022-07-22 21:33:56,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9151 transitions. [2022-07-22 21:33:56,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:33:56,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9151 transitions. [2022-07-22 21:33:56,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 305.03333333333336) internal successors, (9151), 30 states have internal predecessors, (9151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:56,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 389.0) internal successors, (12059), 31 states have internal predecessors, (12059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:56,447 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 389.0) internal successors, (12059), 31 states have internal predecessors, (12059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:56,448 INFO L186 Difference]: Start difference. First operand has 357 places, 320 transitions, 829 flow. Second operand 30 states and 9151 transitions. [2022-07-22 21:33:56,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 330 transitions, 1021 flow [2022-07-22 21:33:56,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 330 transitions, 961 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-22 21:33:56,455 INFO L242 Difference]: Finished difference. Result has 361 places, 314 transitions, 838 flow [2022-07-22 21:33:56,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=838, PETRI_PLACES=361, PETRI_TRANSITIONS=314} [2022-07-22 21:33:56,456 INFO L279 CegarLoopForPetriNet]: 340 programPoint places, 21 predicate places. [2022-07-22 21:33:56,456 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 314 transitions, 838 flow [2022-07-22 21:33:56,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 305.79411764705884) internal successors, (10397), 34 states have internal predecessors, (10397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:33:56,458 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:33:56,458 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:33:56,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 21:33:56,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-22 21:33:56,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:33:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:33:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash -481609427, now seen corresponding path program 1 times [2022-07-22 21:33:56,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:33:56,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9963841] [2022-07-22 21:33:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:33:56,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:33:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:56,709 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:33:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:33:56,740 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:33:56,741 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:33:56,741 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:33:56,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:33:56,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-22 21:33:56,742 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-22 21:33:56,742 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:33:56,742 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-22 21:33:56,776 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-22 21:33:56,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 369 places, 423 transitions, 1016 flow [2022-07-22 21:34:01,270 INFO L129 PetriNetUnfolder]: 5235/20176 cut-off events. [2022-07-22 21:34:01,270 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-22 21:34:01,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25382 conditions, 20176 events. 5235/20176 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 210965 event pairs, 3084 based on Foata normal form. 0/18002 useless extension candidates. Maximal degree in co-relation 12483. Up to 5120 conditions per place. [2022-07-22 21:34:01,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 369 places, 423 transitions, 1016 flow [2022-07-22 21:34:02,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 423 transitions, 1016 flow [2022-07-22 21:34:02,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:02,182 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:34:02,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:02,186 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2022-07-22 21:34:02,186 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:02,186 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:02,186 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] [2022-07-22 21:34:02,187 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:02,187 INFO L85 PathProgramCache]: Analyzing trace with hash 865883060, now seen corresponding path program 1 times [2022-07-22 21:34:02,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:02,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018329978] [2022-07-22 21:34:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:02,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:02,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:02,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018329978] [2022-07-22 21:34:02,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018329978] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:02,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:02,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:02,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226019818] [2022-07-22 21:34:02,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:02,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:02,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:02,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:02,204 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 423 [2022-07-22 21:34:02,204 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 423 transitions, 1016 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:02,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:02,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 423 [2022-07-22 21:34:02,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:07,128 INFO L129 PetriNetUnfolder]: 4106/19018 cut-off events. [2022-07-22 21:34:07,129 INFO L130 PetriNetUnfolder]: For 15650/15973 co-relation queries the response was YES. [2022-07-22 21:34:07,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29409 conditions, 19018 events. 4106/19018 cut-off events. For 15650/15973 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 206294 event pairs, 3084 based on Foata normal form. 33320/51294 useless extension candidates. Maximal degree in co-relation 14220. Up to 5180 conditions per place. [2022-07-22 21:34:07,336 INFO L132 encePairwiseOnDemand]: 355/423 looper letters, 19 selfloop transitions, 2 changer transitions 30/361 dead transitions. [2022-07-22 21:34:07,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 361 transitions, 954 flow [2022-07-22 21:34:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:34:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:34:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1094 transitions. [2022-07-22 21:34:07,338 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8620961386918834 [2022-07-22 21:34:07,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1094 transitions. [2022-07-22 21:34:07,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1094 transitions. [2022-07-22 21:34:07,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:07,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1094 transitions. [2022-07-22 21:34:07,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:07,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:07,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:07,345 INFO L186 Difference]: Start difference. First operand has 369 places, 423 transitions, 1016 flow. Second operand 3 states and 1094 transitions. [2022-07-22 21:34:07,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 361 transitions, 954 flow [2022-07-22 21:34:07,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 361 transitions, 954 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:34:07,360 INFO L242 Difference]: Finished difference. Result has 371 places, 328 transitions, 806 flow [2022-07-22 21:34:07,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=806, PETRI_PLACES=371, PETRI_TRANSITIONS=328} [2022-07-22 21:34:07,361 INFO L279 CegarLoopForPetriNet]: 369 programPoint places, 2 predicate places. [2022-07-22 21:34:07,361 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 328 transitions, 806 flow [2022-07-22 21:34:07,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:07,361 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:07,361 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:07,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-22 21:34:07,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:07,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:07,362 INFO L85 PathProgramCache]: Analyzing trace with hash 880973881, now seen corresponding path program 1 times [2022-07-22 21:34:07,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:07,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127374271] [2022-07-22 21:34:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:07,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:07,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127374271] [2022-07-22 21:34:07,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127374271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:07,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825821049] [2022-07-22 21:34:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:07,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:07,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:07,393 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) [2022-07-22 21:34:07,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 21:34:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:07,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:34:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:07,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:07,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825821049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:07,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:07,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:34:07,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783492704] [2022-07-22 21:34:07,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:07,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:34:07,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:34:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:34:07,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 423 [2022-07-22 21:34:07,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 328 transitions, 806 flow. Second operand has 10 states, 10 states have (on average 331.3) internal successors, (3313), 10 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:07,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:07,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 423 [2022-07-22 21:34:07,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:07,739 INFO L129 PetriNetUnfolder]: 0/496 cut-off events. [2022-07-22 21:34:07,739 INFO L130 PetriNetUnfolder]: For 213/213 co-relation queries the response was YES. [2022-07-22 21:34:07,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 496 events. 0/496 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1486 event pairs, 0 based on Foata normal form. 2/498 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-22 21:34:07,740 INFO L132 encePairwiseOnDemand]: 417/423 looper letters, 20 selfloop transitions, 9 changer transitions 0/338 dead transitions. [2022-07-22 21:34:07,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 338 transitions, 886 flow [2022-07-22 21:34:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:34:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:34:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2992 transitions. [2022-07-22 21:34:07,745 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7859206724454951 [2022-07-22 21:34:07,745 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2992 transitions. [2022-07-22 21:34:07,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2992 transitions. [2022-07-22 21:34:07,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:07,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2992 transitions. [2022-07-22 21:34:07,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 332.44444444444446) internal successors, (2992), 9 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:07,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:07,753 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 423.0) internal successors, (4230), 10 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:07,753 INFO L186 Difference]: Start difference. First operand has 371 places, 328 transitions, 806 flow. Second operand 9 states and 2992 transitions. [2022-07-22 21:34:07,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 338 transitions, 886 flow [2022-07-22 21:34:07,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 338 transitions, 794 flow, removed 45 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:07,762 INFO L242 Difference]: Finished difference. Result has 361 places, 334 transitions, 764 flow [2022-07-22 21:34:07,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=764, PETRI_PLACES=361, PETRI_TRANSITIONS=334} [2022-07-22 21:34:07,763 INFO L279 CegarLoopForPetriNet]: 369 programPoint places, -8 predicate places. [2022-07-22 21:34:07,763 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 334 transitions, 764 flow [2022-07-22 21:34:07,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 331.3) internal successors, (3313), 10 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:07,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:07,764 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:07,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-22 21:34:07,987 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 [2022-07-22 21:34:07,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:07,988 INFO L85 PathProgramCache]: Analyzing trace with hash 549279264, now seen corresponding path program 1 times [2022-07-22 21:34:07,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:07,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429942406] [2022-07-22 21:34:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:07,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:08,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:08,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429942406] [2022-07-22 21:34:08,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429942406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:08,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154052595] [2022-07-22 21:34:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:08,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:08,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:08,046 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) [2022-07-22 21:34:08,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 21:34:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:08,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:34:08,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:08,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:08,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154052595] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:08,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:08,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:34:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644618474] [2022-07-22 21:34:08,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:34:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:34:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:34:08,327 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 423 [2022-07-22 21:34:08,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 334 transitions, 764 flow. Second operand has 18 states, 18 states have (on average 331.6111111111111) internal successors, (5969), 18 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:08,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:08,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 423 [2022-07-22 21:34:08,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:08,565 INFO L129 PetriNetUnfolder]: 0/448 cut-off events. [2022-07-22 21:34:08,565 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-22 21:34:08,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 448 events. 0/448 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1169 event pairs, 0 based on Foata normal form. 4/452 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-22 21:34:08,566 INFO L132 encePairwiseOnDemand]: 417/423 looper letters, 28 selfloop transitions, 21 changer transitions 0/358 dead transitions. [2022-07-22 21:34:08,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 358 transitions, 970 flow [2022-07-22 21:34:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:34:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:34:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6962 transitions. [2022-07-22 21:34:08,569 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7837442305527412 [2022-07-22 21:34:08,570 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6962 transitions. [2022-07-22 21:34:08,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6962 transitions. [2022-07-22 21:34:08,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:08,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6962 transitions. [2022-07-22 21:34:08,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 331.5238095238095) internal successors, (6962), 21 states have internal predecessors, (6962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:08,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 423.0) internal successors, (9306), 22 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:08,581 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 423.0) internal successors, (9306), 22 states have internal predecessors, (9306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:08,581 INFO L186 Difference]: Start difference. First operand has 361 places, 334 transitions, 764 flow. Second operand 21 states and 6962 transitions. [2022-07-22 21:34:08,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 358 transitions, 970 flow [2022-07-22 21:34:08,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 358 transitions, 956 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:34:08,588 INFO L242 Difference]: Finished difference. Result has 385 places, 347 transitions, 888 flow [2022-07-22 21:34:08,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=888, PETRI_PLACES=385, PETRI_TRANSITIONS=347} [2022-07-22 21:34:08,590 INFO L279 CegarLoopForPetriNet]: 369 programPoint places, 16 predicate places. [2022-07-22 21:34:08,590 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 347 transitions, 888 flow [2022-07-22 21:34:08,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 331.6111111111111) internal successors, (5969), 18 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:08,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:08,591 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, 1] [2022-07-22 21:34:08,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:08,807 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 [2022-07-22 21:34:08,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash -779892638, now seen corresponding path program 1 times [2022-07-22 21:34:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:08,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57009894] [2022-07-22 21:34:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:08,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:08,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:08,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57009894] [2022-07-22 21:34:08,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57009894] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:34:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573215446] [2022-07-22 21:34:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:08,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:34:08,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:34:08,941 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) [2022-07-22 21:34:08,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 21:34:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:09,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:34:09,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:34:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:09,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:34:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:09,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573215446] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:34:09,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:34:09,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-22 21:34:09,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966596199] [2022-07-22 21:34:09,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:34:09,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:34:09,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:09,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:34:09,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:34:09,445 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 423 [2022-07-22 21:34:09,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 347 transitions, 888 flow. Second operand has 34 states, 34 states have (on average 331.79411764705884) internal successors, (11281), 34 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:09,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:09,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 423 [2022-07-22 21:34:09,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:34:09,971 INFO L129 PetriNetUnfolder]: 0/400 cut-off events. [2022-07-22 21:34:09,971 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-22 21:34:09,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 400 events. 0/400 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. 4/404 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-22 21:34:09,973 INFO L132 encePairwiseOnDemand]: 418/423 looper letters, 33 selfloop transitions, 31 changer transitions 0/362 dead transitions. [2022-07-22 21:34:09,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 362 transitions, 1126 flow [2022-07-22 21:34:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 21:34:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-22 21:34:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10925 transitions. [2022-07-22 21:34:09,983 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.782649186904506 [2022-07-22 21:34:09,983 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10925 transitions. [2022-07-22 21:34:09,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10925 transitions. [2022-07-22 21:34:09,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:34:09,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10925 transitions. [2022-07-22 21:34:09,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 331.06060606060606) internal successors, (10925), 33 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 423.0) internal successors, (14382), 34 states have internal predecessors, (14382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,013 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 423.0) internal successors, (14382), 34 states have internal predecessors, (14382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,013 INFO L186 Difference]: Start difference. First operand has 385 places, 347 transitions, 888 flow. Second operand 33 states and 10925 transitions. [2022-07-22 21:34:10,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 362 transitions, 1126 flow [2022-07-22 21:34:10,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 362 transitions, 1060 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-22 21:34:10,021 INFO L242 Difference]: Finished difference. Result has 392 places, 344 transitions, 921 flow [2022-07-22 21:34:10,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=921, PETRI_PLACES=392, PETRI_TRANSITIONS=344} [2022-07-22 21:34:10,022 INFO L279 CegarLoopForPetriNet]: 369 programPoint places, 23 predicate places. [2022-07-22 21:34:10,022 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 344 transitions, 921 flow [2022-07-22 21:34:10,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 331.79411764705884) internal successors, (11281), 34 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:10,024 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:10,024 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:34:10,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 21:34:10,243 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 [2022-07-22 21:34:10,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:10,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1995263601, now seen corresponding path program 1 times [2022-07-22 21:34:10,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:10,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471277756] [2022-07-22 21:34:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:10,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:10,264 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:34:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:34:10,291 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:34:10,292 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:34:10,292 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-22 21:34:10,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 21:34:10,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-22 21:34:10,292 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 21:34:10,293 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-22 21:34:10,293 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-22 21:34:10,324 INFO L135 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-07-22 21:34:10,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 398 places, 457 transitions, 1112 flow [2022-07-22 21:34:20,570 INFO L129 PetriNetUnfolder]: 11390/40722 cut-off events. [2022-07-22 21:34:20,571 INFO L130 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-07-22 21:34:22,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52086 conditions, 40722 events. 11390/40722 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 478695 event pairs, 7181 based on Foata normal form. 0/36488 useless extension candidates. Maximal degree in co-relation 25360. Up to 11264 conditions per place. [2022-07-22 21:34:22,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 398 places, 457 transitions, 1112 flow [2022-07-22 21:34:22,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 398 places, 457 transitions, 1112 flow [2022-07-22 21:34:22,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:34:22,835 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@775ab8da, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f57f8cc [2022-07-22 21:34:22,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:34:22,838 INFO L129 PetriNetUnfolder]: 6/89 cut-off events. [2022-07-22 21:34:22,838 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:34:22,838 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:34:22,838 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] [2022-07-22 21:34:22,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:34:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:34:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1462441885, now seen corresponding path program 1 times [2022-07-22 21:34:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:34:22,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415609187] [2022-07-22 21:34:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:34:22,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:34:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:34:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:34:22,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:34:22,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415609187] [2022-07-22 21:34:22,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415609187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:34:22,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:34:22,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:34:22,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869030606] [2022-07-22 21:34:22,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:34:22,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:34:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:34:22,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:34:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:34:22,856 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 356 out of 457 [2022-07-22 21:34:22,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 457 transitions, 1112 flow. Second operand has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:34:22,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:34:22,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 356 of 457 [2022-07-22 21:34:22,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand