./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:18:23,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:18:23,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:18:23,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:18:23,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:18:23,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:18:23,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:18:23,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:18:23,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:18:23,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:18:23,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:18:23,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:18:23,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:18:23,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:18:23,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:18:23,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:18:23,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:18:23,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:18:23,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:18:23,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:18:23,788 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:18:23,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:18:23,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:18:23,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:18:23,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:18:23,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:18:23,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:18:23,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:18:23,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:18:23,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:18:23,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:18:23,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:18:23,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:18:23,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:18:23,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:18:23,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:18:23,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:18:23,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:18:23,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:18:23,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:18:23,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:18:23,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:18:23,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:18:23,825 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:18:23,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:18:23,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:18:23,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:18:23,831 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:18:23,831 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:18:23,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:18:23,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:18:23,832 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:18:23,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:18:23,833 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:18:23,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:18:23,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:18:23,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:18:23,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:18:23,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:18:23,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:18:23,834 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:18:23,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:18:23,834 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:18:23,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:18:23,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:18:23,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:18:23,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:18:23,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:18:23,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:18:23,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:18:23,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:18:23,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:18:23,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:18:23,837 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:18:23,837 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:18:23,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:18:23,838 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2022-07-19 21:18:24,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:18:24,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:18:24,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:18:24,050 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:18:24,051 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:18:24,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-07-19 21:18:24,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/729969445/9116c5fd2b6f4a3a88ac47a4903434e6/FLAGb94d9c788 [2022-07-19 21:18:24,510 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:18:24,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-07-19 21:18:24,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/729969445/9116c5fd2b6f4a3a88ac47a4903434e6/FLAGb94d9c788 [2022-07-19 21:18:24,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/729969445/9116c5fd2b6f4a3a88ac47a4903434e6 [2022-07-19 21:18:24,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:18:24,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:18:24,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:18:24,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:18:24,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:18:24,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ea243f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24, skipping insertion in model container [2022-07-19 21:18:24,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:18:24,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:18:24,788 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_21-deref_read_racing.i[30176,30189] [2022-07-19 21:18:24,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:18:24,816 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:18:24,855 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_21-deref_read_racing.i[30176,30189] [2022-07-19 21:18:24,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:18:24,887 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:18:24,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24 WrapperNode [2022-07-19 21:18:24,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:18:24,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:18:24,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:18:24,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:18:24,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,926 INFO L137 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-19 21:18:24,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:18:24,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:18:24,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:18:24,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:18:24,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:18:24,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:18:24,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:18:24,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:18:24,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (1/1) ... [2022-07-19 21:18:24,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:18:24,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:24,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:18:24,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:18:25,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:18:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:18:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:18:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:18:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:18:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-19 21:18:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-19 21:18:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:18:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:18:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:18:25,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:18:25,020 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:18:25,117 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:18:25,119 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:18:25,278 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:18:25,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:18:25,284 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-19 21:18:25,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:18:25 BoogieIcfgContainer [2022-07-19 21:18:25,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:18:25,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:18:25,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:18:25,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:18:25,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:18:24" (1/3) ... [2022-07-19 21:18:25,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2214aaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:18:25, skipping insertion in model container [2022-07-19 21:18:25,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:24" (2/3) ... [2022-07-19 21:18:25,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2214aaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:18:25, skipping insertion in model container [2022-07-19 21:18:25,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:18:25" (3/3) ... [2022-07-19 21:18:25,293 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2022-07-19 21:18:25,297 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:18:25,304 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:18:25,304 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:18:25,304 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:18:25,358 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:25,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 211 flow [2022-07-19 21:18:25,474 INFO L129 PetriNetUnfolder]: 14/134 cut-off events. [2022-07-19 21:18:25,474 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:25,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 291 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-07-19 21:18:25,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 103 transitions, 211 flow [2022-07-19 21:18:25,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 103 transitions, 211 flow [2022-07-19 21:18:25,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:25,505 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:25,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:25,524 INFO L129 PetriNetUnfolder]: 4/77 cut-off events. [2022-07-19 21:18:25,524 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:25,525 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:25,526 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:25,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1011992479, now seen corresponding path program 1 times [2022-07-19 21:18:25,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:25,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076461665] [2022-07-19 21:18:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:25,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:25,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:25,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076461665] [2022-07-19 21:18:25,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076461665] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:25,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:25,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:25,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333203529] [2022-07-19 21:18:25,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:25,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:25,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:25,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:25,782 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 103 [2022-07-19 21:18:25,786 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 211 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:25,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:25,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 103 [2022-07-19 21:18:25,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:25,827 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2022-07-19 21:18:25,829 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:18:25,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 118 events. 0/118 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 170 event pairs, 0 based on Foata normal form. 14/128 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-07-19 21:18:25,831 INFO L132 encePairwiseOnDemand]: 93/103 looper letters, 1 selfloop transitions, 0 changer transitions 11/92 dead transitions. [2022-07-19 21:18:25,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 191 flow [2022-07-19 21:18:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2022-07-19 21:18:25,843 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9368932038834952 [2022-07-19 21:18:25,844 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2022-07-19 21:18:25,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2022-07-19 21:18:25,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:25,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2022-07-19 21:18:25,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:25,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:25,866 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:25,868 INFO L186 Difference]: Start difference. First operand has 96 places, 103 transitions, 211 flow. Second operand 2 states and 193 transitions. [2022-07-19 21:18:25,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 191 flow [2022-07-19 21:18:25,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:25,874 INFO L242 Difference]: Finished difference. Result has 96 places, 81 transitions, 167 flow [2022-07-19 21:18:25,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=167, PETRI_PLACES=96, PETRI_TRANSITIONS=81} [2022-07-19 21:18:25,879 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 0 predicate places. [2022-07-19 21:18:25,879 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 167 flow [2022-07-19 21:18:25,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:25,879 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:25,880 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] [2022-07-19 21:18:25,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:18:25,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:25,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:25,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1486023458, now seen corresponding path program 1 times [2022-07-19 21:18:25,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:25,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165834413] [2022-07-19 21:18:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:25,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:25,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:25,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165834413] [2022-07-19 21:18:25,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165834413] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:25,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:25,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:25,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973146811] [2022-07-19 21:18:25,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:25,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:25,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:25,986 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 103 [2022-07-19 21:18:25,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 81 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:25,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:25,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 103 [2022-07-19 21:18:25,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:26,018 INFO L129 PetriNetUnfolder]: 0/85 cut-off events. [2022-07-19 21:18:26,018 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:26,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 85 events. 0/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-19 21:18:26,022 INFO L132 encePairwiseOnDemand]: 100/103 looper letters, 8 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-07-19 21:18:26,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 191 flow [2022-07-19 21:18:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2022-07-19 21:18:26,025 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8511326860841424 [2022-07-19 21:18:26,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2022-07-19 21:18:26,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2022-07-19 21:18:26,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:26,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2022-07-19 21:18:26,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,028 INFO L186 Difference]: Start difference. First operand has 96 places, 81 transitions, 167 flow. Second operand 3 states and 263 transitions. [2022-07-19 21:18:26,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 191 flow [2022-07-19 21:18:26,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:26,031 INFO L242 Difference]: Finished difference. Result has 88 places, 81 transitions, 175 flow [2022-07-19 21:18:26,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2022-07-19 21:18:26,031 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2022-07-19 21:18:26,032 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 175 flow [2022-07-19 21:18:26,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,032 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:26,032 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:26,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:18:26,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:26,033 INFO L85 PathProgramCache]: Analyzing trace with hash 455753518, now seen corresponding path program 1 times [2022-07-19 21:18:26,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:26,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681447317] [2022-07-19 21:18:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:26,061 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:26,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:26,101 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:26,102 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:26,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:26,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:18:26,105 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:18:26,109 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:26,109 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:18:26,136 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:26,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 284 flow [2022-07-19 21:18:26,160 INFO L129 PetriNetUnfolder]: 24/203 cut-off events. [2022-07-19 21:18:26,160 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:18:26,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 550 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2022-07-19 21:18:26,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 136 transitions, 284 flow [2022-07-19 21:18:26,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 136 transitions, 284 flow [2022-07-19 21:18:26,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:26,172 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:26,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:26,177 INFO L129 PetriNetUnfolder]: 5/81 cut-off events. [2022-07-19 21:18:26,177 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:26,177 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:26,177 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] [2022-07-19 21:18:26,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:26,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:26,179 INFO L85 PathProgramCache]: Analyzing trace with hash -497376990, now seen corresponding path program 1 times [2022-07-19 21:18:26,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:26,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125222622] [2022-07-19 21:18:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:26,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:26,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:26,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125222622] [2022-07-19 21:18:26,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125222622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:26,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:26,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:26,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800374258] [2022-07-19 21:18:26,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:26,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:26,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:26,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:26,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:26,233 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 136 [2022-07-19 21:18:26,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 136 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:26,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 136 [2022-07-19 21:18:26,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:26,283 INFO L129 PetriNetUnfolder]: 0/154 cut-off events. [2022-07-19 21:18:26,284 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:18:26,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 154 events. 0/154 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 0 based on Foata normal form. 59/209 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-19 21:18:26,285 INFO L132 encePairwiseOnDemand]: 117/136 looper letters, 11 selfloop transitions, 2 changer transitions 11/123 dead transitions. [2022-07-19 21:18:26,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 123 transitions, 284 flow [2022-07-19 21:18:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2022-07-19 21:18:26,290 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8995098039215687 [2022-07-19 21:18:26,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2022-07-19 21:18:26,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2022-07-19 21:18:26,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:26,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2022-07-19 21:18:26,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,295 INFO L186 Difference]: Start difference. First operand has 125 places, 136 transitions, 284 flow. Second operand 3 states and 367 transitions. [2022-07-19 21:18:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 123 transitions, 284 flow [2022-07-19 21:18:26,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 123 transitions, 282 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:26,301 INFO L242 Difference]: Finished difference. Result has 127 places, 109 transitions, 238 flow [2022-07-19 21:18:26,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=127, PETRI_TRANSITIONS=109} [2022-07-19 21:18:26,303 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 2 predicate places. [2022-07-19 21:18:26,303 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 238 flow [2022-07-19 21:18:26,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:26,304 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] [2022-07-19 21:18:26,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:18:26,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:26,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1229485238, now seen corresponding path program 1 times [2022-07-19 21:18:26,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:26,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882807888] [2022-07-19 21:18:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:26,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:26,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:26,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882807888] [2022-07-19 21:18:26,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882807888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:26,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784483194] [2022-07-19 21:18:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:26,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:26,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:26,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:26,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:18:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:26,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:26,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:26,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784483194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:26,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:26,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:26,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324941856] [2022-07-19 21:18:26,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:26,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:26,578 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 136 [2022-07-19 21:18:26,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 109 transitions, 238 flow. Second operand has 10 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:26,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 136 [2022-07-19 21:18:26,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:26,661 INFO L129 PetriNetUnfolder]: 0/110 cut-off events. [2022-07-19 21:18:26,661 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:18:26,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-19 21:18:26,662 INFO L132 encePairwiseOnDemand]: 131/136 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-07-19 21:18:26,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 104 transitions, 258 flow [2022-07-19 21:18:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 999 transitions. [2022-07-19 21:18:26,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8161764705882353 [2022-07-19 21:18:26,665 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 999 transitions. [2022-07-19 21:18:26,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 999 transitions. [2022-07-19 21:18:26,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:26,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 999 transitions. [2022-07-19 21:18:26,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.0) internal successors, (999), 9 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,670 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,670 INFO L186 Difference]: Start difference. First operand has 127 places, 109 transitions, 238 flow. Second operand 9 states and 999 transitions. [2022-07-19 21:18:26,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 104 transitions, 258 flow [2022-07-19 21:18:26,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:26,673 INFO L242 Difference]: Finished difference. Result has 112 places, 100 transitions, 230 flow [2022-07-19 21:18:26,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=112, PETRI_TRANSITIONS=100} [2022-07-19 21:18:26,674 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, -13 predicate places. [2022-07-19 21:18:26,674 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 230 flow [2022-07-19 21:18:26,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:26,675 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:26,675 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:26,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:26,893 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 [2022-07-19 21:18:26,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1842596803, now seen corresponding path program 1 times [2022-07-19 21:18:26,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:26,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573892348] [2022-07-19 21:18:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:26,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:26,932 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:26,965 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:26,965 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:26,965 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:26,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:26,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:18:26,966 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:18:26,966 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:26,966 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:18:26,978 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:26,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 359 flow [2022-07-19 21:18:26,996 INFO L129 PetriNetUnfolder]: 34/272 cut-off events. [2022-07-19 21:18:26,997 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:18:26,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 802 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2022-07-19 21:18:27,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 169 transitions, 359 flow [2022-07-19 21:18:27,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 169 transitions, 359 flow [2022-07-19 21:18:27,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:27,003 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:27,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:27,006 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-19 21:18:27,007 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:27,007 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:27,007 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] [2022-07-19 21:18:27,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash -56624670, now seen corresponding path program 1 times [2022-07-19 21:18:27,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:27,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692088287] [2022-07-19 21:18:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:27,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:27,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692088287] [2022-07-19 21:18:27,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692088287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:27,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:27,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:27,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078683086] [2022-07-19 21:18:27,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:27,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:27,034 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 169 [2022-07-19 21:18:27,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 169 transitions, 359 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:27,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 169 [2022-07-19 21:18:27,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:27,063 INFO L129 PetriNetUnfolder]: 0/212 cut-off events. [2022-07-19 21:18:27,064 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:18:27,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 212 events. 0/212 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 553 event pairs, 0 based on Foata normal form. 129/335 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-19 21:18:27,064 INFO L132 encePairwiseOnDemand]: 144/169 looper letters, 12 selfloop transitions, 2 changer transitions 11/150 dead transitions. [2022-07-19 21:18:27,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 150 transitions, 349 flow [2022-07-19 21:18:27,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2022-07-19 21:18:27,066 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8915187376725838 [2022-07-19 21:18:27,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2022-07-19 21:18:27,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2022-07-19 21:18:27,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:27,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2022-07-19 21:18:27,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,069 INFO L186 Difference]: Start difference. First operand has 154 places, 169 transitions, 359 flow. Second operand 3 states and 452 transitions. [2022-07-19 21:18:27,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 150 transitions, 349 flow [2022-07-19 21:18:27,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 150 transitions, 343 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:27,071 INFO L242 Difference]: Finished difference. Result has 156 places, 136 transitions, 297 flow [2022-07-19 21:18:27,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=156, PETRI_TRANSITIONS=136} [2022-07-19 21:18:27,072 INFO L279 CegarLoopForPetriNet]: 154 programPoint places, 2 predicate places. [2022-07-19 21:18:27,072 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 136 transitions, 297 flow [2022-07-19 21:18:27,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:27,073 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] [2022-07-19 21:18:27,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:18:27,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:27,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1053701942, now seen corresponding path program 1 times [2022-07-19 21:18:27,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:27,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804798441] [2022-07-19 21:18:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:27,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:27,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804798441] [2022-07-19 21:18:27,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804798441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:27,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094833603] [2022-07-19 21:18:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:27,109 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:27,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:18:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:27,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:27,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:27,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:27,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094833603] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:27,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:27,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:27,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925000839] [2022-07-19 21:18:27,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:27,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:27,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:27,245 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 169 [2022-07-19 21:18:27,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 136 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 137.3) internal successors, (1373), 10 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:27,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 169 [2022-07-19 21:18:27,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:27,338 INFO L129 PetriNetUnfolder]: 0/157 cut-off events. [2022-07-19 21:18:27,339 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:18:27,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 157 events. 0/157 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 242 event pairs, 0 based on Foata normal form. 2/159 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-19 21:18:27,339 INFO L132 encePairwiseOnDemand]: 163/169 looper letters, 13 selfloop transitions, 9 changer transitions 0/146 dead transitions. [2022-07-19 21:18:27,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 146 transitions, 363 flow [2022-07-19 21:18:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1239 transitions. [2022-07-19 21:18:27,342 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.814595660749507 [2022-07-19 21:18:27,342 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1239 transitions. [2022-07-19 21:18:27,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1239 transitions. [2022-07-19 21:18:27,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:27,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1239 transitions. [2022-07-19 21:18:27,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 137.66666666666666) internal successors, (1239), 9 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,347 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,348 INFO L186 Difference]: Start difference. First operand has 156 places, 136 transitions, 297 flow. Second operand 9 states and 1239 transitions. [2022-07-19 21:18:27,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 146 transitions, 363 flow [2022-07-19 21:18:27,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 146 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:27,352 INFO L242 Difference]: Finished difference. Result has 155 places, 142 transitions, 345 flow [2022-07-19 21:18:27,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=345, PETRI_PLACES=155, PETRI_TRANSITIONS=142} [2022-07-19 21:18:27,353 INFO L279 CegarLoopForPetriNet]: 154 programPoint places, 1 predicate places. [2022-07-19 21:18:27,353 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 142 transitions, 345 flow [2022-07-19 21:18:27,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.3) internal successors, (1373), 10 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,353 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:27,354 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:27,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:18:27,567 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 [2022-07-19 21:18:27,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1441395879, now seen corresponding path program 1 times [2022-07-19 21:18:27,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:27,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556972117] [2022-07-19 21:18:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:27,583 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:27,614 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:27,614 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:27,614 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:27,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:27,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:18:27,614 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:18:27,615 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:27,615 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:18:27,636 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:27,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 436 flow [2022-07-19 21:18:27,670 INFO L129 PetriNetUnfolder]: 44/341 cut-off events. [2022-07-19 21:18:27,670 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:18:27,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 341 events. 44/341 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1074 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2022-07-19 21:18:27,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 202 transitions, 436 flow [2022-07-19 21:18:27,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 202 transitions, 436 flow [2022-07-19 21:18:27,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:27,679 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:27,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:27,682 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-19 21:18:27,682 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:27,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:27,682 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:27,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash 310264481, now seen corresponding path program 1 times [2022-07-19 21:18:27,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:27,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917785036] [2022-07-19 21:18:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:27,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:27,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917785036] [2022-07-19 21:18:27,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917785036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:27,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:27,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965441414] [2022-07-19 21:18:27,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:27,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:27,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:27,708 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 202 [2022-07-19 21:18:27,708 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 202 transitions, 436 flow. Second operand has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,708 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:27,708 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 202 [2022-07-19 21:18:27,708 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:27,756 INFO L129 PetriNetUnfolder]: 0/292 cut-off events. [2022-07-19 21:18:27,756 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-19 21:18:27,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 292 events. 0/292 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 909 event pairs, 0 based on Foata normal form. 64/346 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2022-07-19 21:18:27,757 INFO L132 encePairwiseOnDemand]: 174/202 looper letters, 4 selfloop transitions, 0 changer transitions 11/173 dead transitions. [2022-07-19 21:18:27,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 386 flow [2022-07-19 21:18:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 370 transitions. [2022-07-19 21:18:27,758 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9158415841584159 [2022-07-19 21:18:27,758 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 370 transitions. [2022-07-19 21:18:27,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 370 transitions. [2022-07-19 21:18:27,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:27,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 370 transitions. [2022-07-19 21:18:27,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,759 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,760 INFO L186 Difference]: Start difference. First operand has 183 places, 202 transitions, 436 flow. Second operand 2 states and 370 transitions. [2022-07-19 21:18:27,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 386 flow [2022-07-19 21:18:27,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 173 transitions, 374 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:27,762 INFO L242 Difference]: Finished difference. Result has 183 places, 162 transitions, 344 flow [2022-07-19 21:18:27,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=183, PETRI_TRANSITIONS=162} [2022-07-19 21:18:27,764 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, 0 predicate places. [2022-07-19 21:18:27,764 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 162 transitions, 344 flow [2022-07-19 21:18:27,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:27,764 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:27,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:18:27,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:27,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1486686878, now seen corresponding path program 1 times [2022-07-19 21:18:27,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:27,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420549885] [2022-07-19 21:18:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:27,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420549885] [2022-07-19 21:18:27,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420549885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:27,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:27,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:27,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893333316] [2022-07-19 21:18:27,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:27,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:27,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:27,791 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 202 [2022-07-19 21:18:27,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 162 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:27,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 202 [2022-07-19 21:18:27,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:27,825 INFO L129 PetriNetUnfolder]: 0/226 cut-off events. [2022-07-19 21:18:27,825 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:18:27,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 226 events. 0/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 541 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-19 21:18:27,826 INFO L132 encePairwiseOnDemand]: 199/202 looper letters, 13 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2022-07-19 21:18:27,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 166 transitions, 382 flow [2022-07-19 21:18:27,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-07-19 21:18:27,827 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8283828382838284 [2022-07-19 21:18:27,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-07-19 21:18:27,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-07-19 21:18:27,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:27,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-07-19 21:18:27,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,829 INFO L186 Difference]: Start difference. First operand has 183 places, 162 transitions, 344 flow. Second operand 3 states and 502 transitions. [2022-07-19 21:18:27,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 166 transitions, 382 flow [2022-07-19 21:18:27,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 166 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:27,832 INFO L242 Difference]: Finished difference. Result has 175 places, 163 transitions, 356 flow [2022-07-19 21:18:27,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=175, PETRI_TRANSITIONS=163} [2022-07-19 21:18:27,834 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, -8 predicate places. [2022-07-19 21:18:27,834 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 163 transitions, 356 flow [2022-07-19 21:18:27,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:27,834 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:27,834 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] [2022-07-19 21:18:27,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:18:27,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:27,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:27,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2070147350, now seen corresponding path program 1 times [2022-07-19 21:18:27,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:27,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570949747] [2022-07-19 21:18:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:27,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:27,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570949747] [2022-07-19 21:18:27,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570949747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:27,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227628722] [2022-07-19 21:18:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:27,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:27,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:27,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:27,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:18:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:27,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:27,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227628722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:28,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:28,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:28,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569829168] [2022-07-19 21:18:28,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:28,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:28,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:28,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:28,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:28,006 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-07-19 21:18:28,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 163 transitions, 356 flow. Second operand has 10 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:28,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-07-19 21:18:28,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:28,105 INFO L129 PetriNetUnfolder]: 0/204 cut-off events. [2022-07-19 21:18:28,105 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:18:28,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 204 events. 0/204 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 412 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-19 21:18:28,105 INFO L132 encePairwiseOnDemand]: 196/202 looper letters, 14 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-07-19 21:18:28,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 424 flow [2022-07-19 21:18:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1474 transitions. [2022-07-19 21:18:28,109 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8107810781078107 [2022-07-19 21:18:28,109 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1474 transitions. [2022-07-19 21:18:28,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1474 transitions. [2022-07-19 21:18:28,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:28,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1474 transitions. [2022-07-19 21:18:28,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.77777777777777) internal successors, (1474), 9 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,114 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,114 INFO L186 Difference]: Start difference. First operand has 175 places, 163 transitions, 356 flow. Second operand 9 states and 1474 transitions. [2022-07-19 21:18:28,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 424 flow [2022-07-19 21:18:28,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 173 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:28,117 INFO L242 Difference]: Finished difference. Result has 185 places, 169 transitions, 404 flow [2022-07-19 21:18:28,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=404, PETRI_PLACES=185, PETRI_TRANSITIONS=169} [2022-07-19 21:18:28,118 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, 2 predicate places. [2022-07-19 21:18:28,118 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 169 transitions, 404 flow [2022-07-19 21:18:28,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,120 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:28,120 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] [2022-07-19 21:18:28,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:28,330 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 [2022-07-19 21:18:28,331 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1101282751, now seen corresponding path program 1 times [2022-07-19 21:18:28,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:28,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118700851] [2022-07-19 21:18:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:28,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118700851] [2022-07-19 21:18:28,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118700851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:28,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001534675] [2022-07-19 21:18:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:28,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:28,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:28,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:18:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:28,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001534675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:28,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:28,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:28,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198023957] [2022-07-19 21:18:28,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:28,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:28,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:28,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:28,624 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-07-19 21:18:28,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 169 transitions, 404 flow. Second operand has 18 states, 18 states have (on average 163.61111111111111) internal successors, (2945), 18 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:28,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-07-19 21:18:28,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:28,726 INFO L129 PetriNetUnfolder]: 0/182 cut-off events. [2022-07-19 21:18:28,726 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-19 21:18:28,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 182 events. 0/182 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-19 21:18:28,726 INFO L132 encePairwiseOnDemand]: 197/202 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-07-19 21:18:28,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 470 flow [2022-07-19 21:18:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:18:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:18:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2445 transitions. [2022-07-19 21:18:28,731 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.806930693069307 [2022-07-19 21:18:28,731 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2445 transitions. [2022-07-19 21:18:28,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2445 transitions. [2022-07-19 21:18:28,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:28,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2445 transitions. [2022-07-19 21:18:28,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,739 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,739 INFO L186 Difference]: Start difference. First operand has 185 places, 169 transitions, 404 flow. Second operand 15 states and 2445 transitions. [2022-07-19 21:18:28,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 470 flow [2022-07-19 21:18:28,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-19 21:18:28,742 INFO L242 Difference]: Finished difference. Result has 184 places, 161 transitions, 402 flow [2022-07-19 21:18:28,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=402, PETRI_PLACES=184, PETRI_TRANSITIONS=161} [2022-07-19 21:18:28,742 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, 1 predicate places. [2022-07-19 21:18:28,742 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 402 flow [2022-07-19 21:18:28,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.61111111111111) internal successors, (2945), 18 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:28,743 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:28,743 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:28,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:28,952 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 [2022-07-19 21:18:28,953 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:28,953 INFO L85 PathProgramCache]: Analyzing trace with hash -909920624, now seen corresponding path program 1 times [2022-07-19 21:18:28,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:28,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649363066] [2022-07-19 21:18:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:28,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:29,003 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:29,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:29,036 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:29,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:29,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:29,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:18:29,037 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:29,037 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:29,037 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:18:29,051 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:29,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 212 places, 235 transitions, 515 flow [2022-07-19 21:18:29,084 INFO L129 PetriNetUnfolder]: 54/410 cut-off events. [2022-07-19 21:18:29,084 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:18:29,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 410 events. 54/410 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1315 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 354. Up to 12 conditions per place. [2022-07-19 21:18:29,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 235 transitions, 515 flow [2022-07-19 21:18:29,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 235 transitions, 515 flow [2022-07-19 21:18:29,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:29,093 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:29,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:29,096 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-19 21:18:29,096 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:29,096 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,096 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] [2022-07-19 21:18:29,097 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1304355041, now seen corresponding path program 1 times [2022-07-19 21:18:29,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290158759] [2022-07-19 21:18:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:29,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290158759] [2022-07-19 21:18:29,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290158759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:29,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:29,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:29,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492986838] [2022-07-19 21:18:29,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:29,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:29,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:29,109 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 235 [2022-07-19 21:18:29,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 515 flow. Second operand has 2 states, 2 states have (on average 195.5) internal successors, (391), 2 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:29,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 235 [2022-07-19 21:18:29,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:29,153 INFO L129 PetriNetUnfolder]: 0/350 cut-off events. [2022-07-19 21:18:29,153 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-07-19 21:18:29,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 350 events. 0/350 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1153 event pairs, 0 based on Foata normal form. 92/430 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-19 21:18:29,154 INFO L132 encePairwiseOnDemand]: 201/235 looper letters, 5 selfloop transitions, 0 changer transitions 11/200 dead transitions. [2022-07-19 21:18:29,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 200 transitions, 455 flow [2022-07-19 21:18:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 429 transitions. [2022-07-19 21:18:29,155 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9127659574468086 [2022-07-19 21:18:29,155 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 429 transitions. [2022-07-19 21:18:29,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 429 transitions. [2022-07-19 21:18:29,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:29,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 429 transitions. [2022-07-19 21:18:29,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 214.5) internal successors, (429), 2 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,157 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,158 INFO L186 Difference]: Start difference. First operand has 212 places, 235 transitions, 515 flow. Second operand 2 states and 429 transitions. [2022-07-19 21:18:29,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 200 transitions, 455 flow [2022-07-19 21:18:29,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 200 transitions, 435 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:29,160 INFO L242 Difference]: Finished difference. Result has 212 places, 189 transitions, 403 flow [2022-07-19 21:18:29,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=403, PETRI_PLACES=212, PETRI_TRANSITIONS=189} [2022-07-19 21:18:29,161 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, 0 predicate places. [2022-07-19 21:18:29,161 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 189 transitions, 403 flow [2022-07-19 21:18:29,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 195.5) internal successors, (391), 2 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,161 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,161 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] [2022-07-19 21:18:29,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:18:29,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,162 INFO L85 PathProgramCache]: Analyzing trace with hash -492596318, now seen corresponding path program 1 times [2022-07-19 21:18:29,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423800189] [2022-07-19 21:18:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423800189] [2022-07-19 21:18:29,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423800189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:29,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:29,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:29,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897113123] [2022-07-19 21:18:29,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:29,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:29,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:29,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:29,177 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 235 [2022-07-19 21:18:29,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 189 transitions, 403 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:29,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 235 [2022-07-19 21:18:29,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:29,215 INFO L129 PetriNetUnfolder]: 0/273 cut-off events. [2022-07-19 21:18:29,215 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:18:29,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 273 events. 0/273 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 713 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-19 21:18:29,216 INFO L132 encePairwiseOnDemand]: 232/235 looper letters, 14 selfloop transitions, 2 changer transitions 0/193 dead transitions. [2022-07-19 21:18:29,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 193 transitions, 443 flow [2022-07-19 21:18:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-07-19 21:18:29,218 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8241134751773049 [2022-07-19 21:18:29,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-07-19 21:18:29,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-07-19 21:18:29,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:29,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-07-19 21:18:29,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,220 INFO L186 Difference]: Start difference. First operand has 212 places, 189 transitions, 403 flow. Second operand 3 states and 581 transitions. [2022-07-19 21:18:29,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 193 transitions, 443 flow [2022-07-19 21:18:29,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 193 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:29,223 INFO L242 Difference]: Finished difference. Result has 204 places, 190 transitions, 415 flow [2022-07-19 21:18:29,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=204, PETRI_TRANSITIONS=190} [2022-07-19 21:18:29,224 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, -8 predicate places. [2022-07-19 21:18:29,224 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 190 transitions, 415 flow [2022-07-19 21:18:29,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,225 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,225 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] [2022-07-19 21:18:29,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:18:29,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,225 INFO L85 PathProgramCache]: Analyzing trace with hash -16145834, now seen corresponding path program 1 times [2022-07-19 21:18:29,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163275796] [2022-07-19 21:18:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163275796] [2022-07-19 21:18:29,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163275796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328855872] [2022-07-19 21:18:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:29,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:29,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:18:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:29,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328855872] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:29,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:29,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:29,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260992432] [2022-07-19 21:18:29,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:29,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:29,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:29,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:29,378 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-07-19 21:18:29,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 190 transitions, 415 flow. Second operand has 10 states, 10 states have (on average 189.3) internal successors, (1893), 10 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:29,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-07-19 21:18:29,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:29,477 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2022-07-19 21:18:29,477 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:18:29,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 251 events. 0/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 582 event pairs, 0 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-19 21:18:29,478 INFO L132 encePairwiseOnDemand]: 229/235 looper letters, 15 selfloop transitions, 9 changer transitions 0/200 dead transitions. [2022-07-19 21:18:29,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 200 transitions, 485 flow [2022-07-19 21:18:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1709 transitions. [2022-07-19 21:18:29,480 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8080378250591016 [2022-07-19 21:18:29,480 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1709 transitions. [2022-07-19 21:18:29,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1709 transitions. [2022-07-19 21:18:29,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:29,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1709 transitions. [2022-07-19 21:18:29,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 189.88888888888889) internal successors, (1709), 9 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,486 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,487 INFO L186 Difference]: Start difference. First operand has 204 places, 190 transitions, 415 flow. Second operand 9 states and 1709 transitions. [2022-07-19 21:18:29,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 200 transitions, 485 flow [2022-07-19 21:18:29,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 200 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:29,489 INFO L242 Difference]: Finished difference. Result has 214 places, 196 transitions, 463 flow [2022-07-19 21:18:29,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=463, PETRI_PLACES=214, PETRI_TRANSITIONS=196} [2022-07-19 21:18:29,490 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, 2 predicate places. [2022-07-19 21:18:29,490 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 196 transitions, 463 flow [2022-07-19 21:18:29,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.3) internal successors, (1893), 10 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,491 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,491 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] [2022-07-19 21:18:29,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:29,712 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 [2022-07-19 21:18:29,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2021107327, now seen corresponding path program 1 times [2022-07-19 21:18:29,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915926296] [2022-07-19 21:18:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:29,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915926296] [2022-07-19 21:18:29,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915926296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:29,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637628567] [2022-07-19 21:18:29,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:29,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:29,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:29,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:18:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:29,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637628567] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:29,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:29,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:29,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769110713] [2022-07-19 21:18:29,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:29,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:29,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-07-19 21:18:29,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 196 transitions, 463 flow. Second operand has 18 states, 18 states have (on average 189.61111111111111) internal successors, (3413), 18 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:29,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:29,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-07-19 21:18:29,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:30,076 INFO L129 PetriNetUnfolder]: 0/218 cut-off events. [2022-07-19 21:18:30,076 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-19 21:18:30,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 218 events. 0/218 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-19 21:18:30,077 INFO L132 encePairwiseOnDemand]: 230/235 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-07-19 21:18:30,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 200 transitions, 565 flow [2022-07-19 21:18:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:18:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:18:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3403 transitions. [2022-07-19 21:18:30,100 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8044917257683215 [2022-07-19 21:18:30,100 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3403 transitions. [2022-07-19 21:18:30,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3403 transitions. [2022-07-19 21:18:30,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:30,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3403 transitions. [2022-07-19 21:18:30,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.05555555555554) internal successors, (3403), 18 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,112 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,112 INFO L186 Difference]: Start difference. First operand has 214 places, 196 transitions, 463 flow. Second operand 18 states and 3403 transitions. [2022-07-19 21:18:30,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 200 transitions, 565 flow [2022-07-19 21:18:30,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-19 21:18:30,115 INFO L242 Difference]: Finished difference. Result has 216 places, 191 transitions, 480 flow [2022-07-19 21:18:30,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=216, PETRI_TRANSITIONS=191} [2022-07-19 21:18:30,116 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, 4 predicate places. [2022-07-19 21:18:30,116 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 191 transitions, 480 flow [2022-07-19 21:18:30,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 189.61111111111111) internal successors, (3413), 18 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,117 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,117 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:30,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:30,334 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 [2022-07-19 21:18:30,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash -30972408, now seen corresponding path program 1 times [2022-07-19 21:18:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:30,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992309970] [2022-07-19 21:18:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:30,348 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:30,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:30,365 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:30,365 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:30,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:30,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 21:18:30,365 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:30,366 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:30,366 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 21:18:30,380 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:30,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 268 transitions, 596 flow [2022-07-19 21:18:30,426 INFO L129 PetriNetUnfolder]: 64/479 cut-off events. [2022-07-19 21:18:30,426 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-19 21:18:30,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 479 events. 64/479 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1576 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 429. Up to 14 conditions per place. [2022-07-19 21:18:30,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 268 transitions, 596 flow [2022-07-19 21:18:30,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 268 transitions, 596 flow [2022-07-19 21:18:30,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:30,440 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:30,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:30,443 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-19 21:18:30,444 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:30,444 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,444 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:30,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:30,444 INFO L85 PathProgramCache]: Analyzing trace with hash 427631073, now seen corresponding path program 1 times [2022-07-19 21:18:30,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:30,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204296550] [2022-07-19 21:18:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:30,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204296550] [2022-07-19 21:18:30,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204296550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:30,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:30,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217194187] [2022-07-19 21:18:30,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:30,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:30,455 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 268 [2022-07-19 21:18:30,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 268 transitions, 596 flow. Second operand has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:30,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 268 [2022-07-19 21:18:30,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:30,511 INFO L129 PetriNetUnfolder]: 0/408 cut-off events. [2022-07-19 21:18:30,511 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-07-19 21:18:30,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 408 events. 0/408 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1411 event pairs, 0 based on Foata normal form. 126/520 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-19 21:18:30,512 INFO L132 encePairwiseOnDemand]: 228/268 looper letters, 6 selfloop transitions, 0 changer transitions 11/227 dead transitions. [2022-07-19 21:18:30,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 526 flow [2022-07-19 21:18:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 488 transitions. [2022-07-19 21:18:30,514 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9104477611940298 [2022-07-19 21:18:30,514 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 488 transitions. [2022-07-19 21:18:30,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 488 transitions. [2022-07-19 21:18:30,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:30,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 488 transitions. [2022-07-19 21:18:30,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.0) internal successors, (488), 2 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,515 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,515 INFO L186 Difference]: Start difference. First operand has 241 places, 268 transitions, 596 flow. Second operand 2 states and 488 transitions. [2022-07-19 21:18:30,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 526 flow [2022-07-19 21:18:30,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 227 transitions, 496 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:30,518 INFO L242 Difference]: Finished difference. Result has 241 places, 216 transitions, 462 flow [2022-07-19 21:18:30,519 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=462, PETRI_PLACES=241, PETRI_TRANSITIONS=216} [2022-07-19 21:18:30,519 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 0 predicate places. [2022-07-19 21:18:30,519 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 216 transitions, 462 flow [2022-07-19 21:18:30,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,519 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,520 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] [2022-07-19 21:18:30,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:18:30,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1369320286, now seen corresponding path program 1 times [2022-07-19 21:18:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:30,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951854448] [2022-07-19 21:18:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:30,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951854448] [2022-07-19 21:18:30,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951854448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:30,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:30,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:30,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457363701] [2022-07-19 21:18:30,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:30,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:30,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:30,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:30,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:30,534 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 268 [2022-07-19 21:18:30,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 216 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:30,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 268 [2022-07-19 21:18:30,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:30,581 INFO L129 PetriNetUnfolder]: 0/320 cut-off events. [2022-07-19 21:18:30,581 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:18:30,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 320 events. 0/320 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 881 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-19 21:18:30,582 INFO L132 encePairwiseOnDemand]: 265/268 looper letters, 15 selfloop transitions, 2 changer transitions 0/220 dead transitions. [2022-07-19 21:18:30,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 220 transitions, 504 flow [2022-07-19 21:18:30,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2022-07-19 21:18:30,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8208955223880597 [2022-07-19 21:18:30,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2022-07-19 21:18:30,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2022-07-19 21:18:30,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:30,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2022-07-19 21:18:30,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,586 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,586 INFO L186 Difference]: Start difference. First operand has 241 places, 216 transitions, 462 flow. Second operand 3 states and 660 transitions. [2022-07-19 21:18:30,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 220 transitions, 504 flow [2022-07-19 21:18:30,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 220 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:30,589 INFO L242 Difference]: Finished difference. Result has 233 places, 217 transitions, 474 flow [2022-07-19 21:18:30,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=474, PETRI_PLACES=233, PETRI_TRANSITIONS=217} [2022-07-19 21:18:30,590 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, -8 predicate places. [2022-07-19 21:18:30,590 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 217 transitions, 474 flow [2022-07-19 21:18:30,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,590 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,590 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] [2022-07-19 21:18:30,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 21:18:30,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:30,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:30,591 INFO L85 PathProgramCache]: Analyzing trace with hash -910210314, now seen corresponding path program 1 times [2022-07-19 21:18:30,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:30,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614336347] [2022-07-19 21:18:30,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:30,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614336347] [2022-07-19 21:18:30,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614336347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:30,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475859892] [2022-07-19 21:18:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:30,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:30,636 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:30,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:18:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:30,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475859892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:30,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:30,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:30,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198437537] [2022-07-19 21:18:30,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:30,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:30,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:30,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:30,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:30,748 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-07-19 21:18:30,750 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 217 transitions, 474 flow. Second operand has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:30,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-07-19 21:18:30,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:30,835 INFO L129 PetriNetUnfolder]: 0/298 cut-off events. [2022-07-19 21:18:30,836 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:18:30,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 298 events. 0/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 753 event pairs, 0 based on Foata normal form. 2/300 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-19 21:18:30,836 INFO L132 encePairwiseOnDemand]: 262/268 looper letters, 16 selfloop transitions, 9 changer transitions 0/227 dead transitions. [2022-07-19 21:18:30,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 546 flow [2022-07-19 21:18:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1944 transitions. [2022-07-19 21:18:30,840 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8059701492537313 [2022-07-19 21:18:30,840 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1944 transitions. [2022-07-19 21:18:30,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1944 transitions. [2022-07-19 21:18:30,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:30,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1944 transitions. [2022-07-19 21:18:30,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.0) internal successors, (1944), 9 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,845 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,845 INFO L186 Difference]: Start difference. First operand has 233 places, 217 transitions, 474 flow. Second operand 9 states and 1944 transitions. [2022-07-19 21:18:30,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 546 flow [2022-07-19 21:18:30,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 227 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:30,849 INFO L242 Difference]: Finished difference. Result has 243 places, 223 transitions, 522 flow [2022-07-19 21:18:30,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=522, PETRI_PLACES=243, PETRI_TRANSITIONS=223} [2022-07-19 21:18:30,849 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 2 predicate places. [2022-07-19 21:18:30,849 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 223 transitions, 522 flow [2022-07-19 21:18:30,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,850 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,850 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] [2022-07-19 21:18:30,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:31,067 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 [2022-07-19 21:18:31,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1557677727, now seen corresponding path program 1 times [2022-07-19 21:18:31,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351469840] [2022-07-19 21:18:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:31,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351469840] [2022-07-19 21:18:31,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351469840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:31,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099482020] [2022-07-19 21:18:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:31,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:31,108 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:31,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:18:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:31,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099482020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:31,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:31,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:31,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297597080] [2022-07-19 21:18:31,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:31,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:31,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:31,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:31,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:31,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-07-19 21:18:31,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 223 transitions, 522 flow. Second operand has 18 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:31,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-07-19 21:18:31,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:31,454 INFO L129 PetriNetUnfolder]: 0/254 cut-off events. [2022-07-19 21:18:31,455 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:18:31,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 254 events. 0/254 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-19 21:18:31,469 INFO L132 encePairwiseOnDemand]: 263/268 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-07-19 21:18:31,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 232 transitions, 660 flow [2022-07-19 21:18:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4517 transitions. [2022-07-19 21:18:31,474 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8025941719971571 [2022-07-19 21:18:31,474 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4517 transitions. [2022-07-19 21:18:31,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4517 transitions. [2022-07-19 21:18:31,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:31,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4517 transitions. [2022-07-19 21:18:31,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 215.0952380952381) internal successors, (4517), 21 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,486 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,487 INFO L186 Difference]: Start difference. First operand has 243 places, 223 transitions, 522 flow. Second operand 21 states and 4517 transitions. [2022-07-19 21:18:31,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 232 transitions, 660 flow [2022-07-19 21:18:31,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-19 21:18:31,490 INFO L242 Difference]: Finished difference. Result has 248 places, 221 transitions, 558 flow [2022-07-19 21:18:31,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=248, PETRI_TRANSITIONS=221} [2022-07-19 21:18:31,491 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 7 predicate places. [2022-07-19 21:18:31,491 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 221 transitions, 558 flow [2022-07-19 21:18:31,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,492 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,492 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:31,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:18:31,711 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 [2022-07-19 21:18:31,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1257008543, now seen corresponding path program 1 times [2022-07-19 21:18:31,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768671271] [2022-07-19 21:18:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:31,725 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:31,740 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:31,740 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:31,741 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:31,741 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:31,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 21:18:31,741 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:31,741 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:31,741 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-19 21:18:31,758 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:31,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 270 places, 301 transitions, 679 flow [2022-07-19 21:18:31,813 INFO L129 PetriNetUnfolder]: 74/548 cut-off events. [2022-07-19 21:18:31,813 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-19 21:18:31,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 548 events. 74/548 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1844 event pairs, 0 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 505. Up to 16 conditions per place. [2022-07-19 21:18:31,822 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 301 transitions, 679 flow [2022-07-19 21:18:31,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 301 transitions, 679 flow [2022-07-19 21:18:31,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:31,829 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:31,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:31,831 INFO L129 PetriNetUnfolder]: 4/79 cut-off events. [2022-07-19 21:18:31,831 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:31,832 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,832 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:31,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1975059873, now seen corresponding path program 1 times [2022-07-19 21:18:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787977270] [2022-07-19 21:18:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787977270] [2022-07-19 21:18:31,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787977270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:31,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:31,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712766551] [2022-07-19 21:18:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:31,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:31,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 301 [2022-07-19 21:18:31,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 301 transitions, 679 flow. Second operand has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:31,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 301 [2022-07-19 21:18:31,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:31,921 INFO L129 PetriNetUnfolder]: 0/466 cut-off events. [2022-07-19 21:18:31,921 INFO L130 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-07-19 21:18:31,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 466 events. 0/466 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1662 event pairs, 0 based on Foata normal form. 166/616 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-07-19 21:18:31,922 INFO L132 encePairwiseOnDemand]: 255/301 looper letters, 7 selfloop transitions, 0 changer transitions 11/254 dead transitions. [2022-07-19 21:18:31,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 599 flow [2022-07-19 21:18:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 547 transitions. [2022-07-19 21:18:31,924 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9086378737541528 [2022-07-19 21:18:31,924 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 547 transitions. [2022-07-19 21:18:31,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 547 transitions. [2022-07-19 21:18:31,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:31,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 547 transitions. [2022-07-19 21:18:31,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,926 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,926 INFO L186 Difference]: Start difference. First operand has 270 places, 301 transitions, 679 flow. Second operand 2 states and 547 transitions. [2022-07-19 21:18:31,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 599 flow [2022-07-19 21:18:31,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 254 transitions, 557 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:31,929 INFO L242 Difference]: Finished difference. Result has 270 places, 243 transitions, 521 flow [2022-07-19 21:18:31,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=521, PETRI_PLACES=270, PETRI_TRANSITIONS=243} [2022-07-19 21:18:31,930 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 0 predicate places. [2022-07-19 21:18:31,930 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 243 transitions, 521 flow [2022-07-19 21:18:31,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,930 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,930 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] [2022-07-19 21:18:31,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 21:18:31,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash 178108514, now seen corresponding path program 1 times [2022-07-19 21:18:31,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027764282] [2022-07-19 21:18:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:31,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027764282] [2022-07-19 21:18:31,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027764282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:31,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:31,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:31,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100545816] [2022-07-19 21:18:31,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:31,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:31,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:31,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:31,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:31,959 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 301 [2022-07-19 21:18:31,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 243 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:31,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 301 [2022-07-19 21:18:31,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:32,030 INFO L129 PetriNetUnfolder]: 0/367 cut-off events. [2022-07-19 21:18:32,030 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:18:32,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 367 events. 0/367 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1051 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-19 21:18:32,031 INFO L132 encePairwiseOnDemand]: 298/301 looper letters, 16 selfloop transitions, 2 changer transitions 0/247 dead transitions. [2022-07-19 21:18:32,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 247 transitions, 565 flow [2022-07-19 21:18:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2022-07-19 21:18:32,032 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8183831672203765 [2022-07-19 21:18:32,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2022-07-19 21:18:32,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2022-07-19 21:18:32,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:32,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2022-07-19 21:18:32,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,034 INFO L186 Difference]: Start difference. First operand has 270 places, 243 transitions, 521 flow. Second operand 3 states and 739 transitions. [2022-07-19 21:18:32,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 247 transitions, 565 flow [2022-07-19 21:18:32,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 247 transitions, 565 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:32,037 INFO L242 Difference]: Finished difference. Result has 262 places, 244 transitions, 533 flow [2022-07-19 21:18:32,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=533, PETRI_PLACES=262, PETRI_TRANSITIONS=244} [2022-07-19 21:18:32,038 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, -8 predicate places. [2022-07-19 21:18:32,038 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 244 transitions, 533 flow [2022-07-19 21:18:32,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,038 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,038 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] [2022-07-19 21:18:32,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-19 21:18:32,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:32,038 INFO L85 PathProgramCache]: Analyzing trace with hash -612046090, now seen corresponding path program 1 times [2022-07-19 21:18:32,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:32,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447548493] [2022-07-19 21:18:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:32,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447548493] [2022-07-19 21:18:32,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447548493] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:32,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151210742] [2022-07-19 21:18:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:32,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:32,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:32,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:18:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:32,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151210742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:32,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:32,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:32,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762722559] [2022-07-19 21:18:32,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:32,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:32,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:32,189 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-07-19 21:18:32,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 244 transitions, 533 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:32,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-07-19 21:18:32,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:32,286 INFO L129 PetriNetUnfolder]: 0/345 cut-off events. [2022-07-19 21:18:32,287 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-19 21:18:32,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 345 events. 0/345 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 920 event pairs, 0 based on Foata normal form. 2/347 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-19 21:18:32,287 INFO L132 encePairwiseOnDemand]: 295/301 looper letters, 17 selfloop transitions, 9 changer transitions 0/254 dead transitions. [2022-07-19 21:18:32,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 607 flow [2022-07-19 21:18:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2179 transitions. [2022-07-19 21:18:32,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8043558508674787 [2022-07-19 21:18:32,290 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2179 transitions. [2022-07-19 21:18:32,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2179 transitions. [2022-07-19 21:18:32,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:32,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2179 transitions. [2022-07-19 21:18:32,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 242.11111111111111) internal successors, (2179), 9 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,294 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,294 INFO L186 Difference]: Start difference. First operand has 262 places, 244 transitions, 533 flow. Second operand 9 states and 2179 transitions. [2022-07-19 21:18:32,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 607 flow [2022-07-19 21:18:32,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 254 transitions, 605 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:32,298 INFO L242 Difference]: Finished difference. Result has 272 places, 250 transitions, 581 flow [2022-07-19 21:18:32,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=581, PETRI_PLACES=272, PETRI_TRANSITIONS=250} [2022-07-19 21:18:32,298 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 2 predicate places. [2022-07-19 21:18:32,298 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 250 transitions, 581 flow [2022-07-19 21:18:32,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,299 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,299 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] [2022-07-19 21:18:32,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 21:18:32,514 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 [2022-07-19 21:18:32,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:32,514 INFO L85 PathProgramCache]: Analyzing trace with hash 289006049, now seen corresponding path program 1 times [2022-07-19 21:18:32,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:32,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999874067] [2022-07-19 21:18:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:32,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999874067] [2022-07-19 21:18:32,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999874067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:32,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068373933] [2022-07-19 21:18:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:32,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:32,558 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:32,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:18:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:32,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068373933] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:32,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:32,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:32,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109114197] [2022-07-19 21:18:32,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:32,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:32,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:32,795 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-07-19 21:18:32,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 250 transitions, 581 flow. Second operand has 18 states, 18 states have (on average 241.61111111111111) internal successors, (4349), 18 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:32,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-07-19 21:18:32,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:32,982 INFO L129 PetriNetUnfolder]: 0/301 cut-off events. [2022-07-19 21:18:32,983 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-19 21:18:32,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 301 events. 0/301 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 634 event pairs, 0 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-19 21:18:32,984 INFO L132 encePairwiseOnDemand]: 295/301 looper letters, 25 selfloop transitions, 21 changer transitions 0/274 dead transitions. [2022-07-19 21:18:32,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 274 transitions, 781 flow [2022-07-19 21:18:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5069 transitions. [2022-07-19 21:18:33,009 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8019300743553235 [2022-07-19 21:18:33,009 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5069 transitions. [2022-07-19 21:18:33,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5069 transitions. [2022-07-19 21:18:33,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:33,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5069 transitions. [2022-07-19 21:18:33,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 241.38095238095238) internal successors, (5069), 21 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,022 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,022 INFO L186 Difference]: Start difference. First operand has 272 places, 250 transitions, 581 flow. Second operand 21 states and 5069 transitions. [2022-07-19 21:18:33,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 274 transitions, 781 flow [2022-07-19 21:18:33,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 274 transitions, 767 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:33,026 INFO L242 Difference]: Finished difference. Result has 296 places, 263 transitions, 705 flow [2022-07-19 21:18:33,026 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=705, PETRI_PLACES=296, PETRI_TRANSITIONS=263} [2022-07-19 21:18:33,027 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 26 predicate places. [2022-07-19 21:18:33,027 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 263 transitions, 705 flow [2022-07-19 21:18:33,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 241.61111111111111) internal successors, (4349), 18 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,028 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:33,028 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:33,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:33,245 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 [2022-07-19 21:18:33,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash -143485893, now seen corresponding path program 1 times [2022-07-19 21:18:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180496706] [2022-07-19 21:18:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:33,288 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:33,318 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:33,318 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:33,318 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:33,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:33,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-19 21:18:33,318 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:33,319 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:33,319 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-19 21:18:33,334 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:33,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 299 places, 334 transitions, 764 flow [2022-07-19 21:18:33,399 INFO L129 PetriNetUnfolder]: 84/617 cut-off events. [2022-07-19 21:18:33,399 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-19 21:18:33,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 617 events. 84/617 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2100 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 582. Up to 18 conditions per place. [2022-07-19 21:18:33,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 334 transitions, 764 flow [2022-07-19 21:18:33,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 334 transitions, 764 flow [2022-07-19 21:18:33,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:33,418 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:33,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:33,421 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-19 21:18:33,421 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:33,421 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:33,421 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] [2022-07-19 21:18:33,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash -145277214, now seen corresponding path program 1 times [2022-07-19 21:18:33,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:33,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923988373] [2022-07-19 21:18:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:33,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923988373] [2022-07-19 21:18:33,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923988373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:33,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:33,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:33,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998329312] [2022-07-19 21:18:33,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:33,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 334 [2022-07-19 21:18:33,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 334 transitions, 764 flow. Second operand has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:33,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 334 [2022-07-19 21:18:33,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:33,528 INFO L129 PetriNetUnfolder]: 0/502 cut-off events. [2022-07-19 21:18:33,528 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-19 21:18:33,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 502 events. 0/502 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1802 event pairs, 0 based on Foata normal form. 1024/1510 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-19 21:18:33,529 INFO L132 encePairwiseOnDemand]: 279/334 looper letters, 17 selfloop transitions, 2 changer transitions 11/285 dead transitions. [2022-07-19 21:18:33,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 285 transitions, 704 flow [2022-07-19 21:18:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2022-07-19 21:18:33,531 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.875249500998004 [2022-07-19 21:18:33,531 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2022-07-19 21:18:33,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2022-07-19 21:18:33,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:33,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2022-07-19 21:18:33,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,533 INFO L186 Difference]: Start difference. First operand has 299 places, 334 transitions, 764 flow. Second operand 3 states and 877 transitions. [2022-07-19 21:18:33,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 285 transitions, 704 flow [2022-07-19 21:18:33,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 285 transitions, 648 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:33,537 INFO L242 Difference]: Finished difference. Result has 301 places, 271 transitions, 592 flow [2022-07-19 21:18:33,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=592, PETRI_PLACES=301, PETRI_TRANSITIONS=271} [2022-07-19 21:18:33,537 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 2 predicate places. [2022-07-19 21:18:33,538 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 271 transitions, 592 flow [2022-07-19 21:18:33,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,538 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:33,538 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] [2022-07-19 21:18:33,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-19 21:18:33,538 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash 878346838, now seen corresponding path program 1 times [2022-07-19 21:18:33,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:33,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876046838] [2022-07-19 21:18:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876046838] [2022-07-19 21:18:33,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876046838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431985245] [2022-07-19 21:18:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:33,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:33,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:33,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:18:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:33,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:33,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:33,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431985245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:33,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:33,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:33,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030062209] [2022-07-19 21:18:33,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:33,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:33,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:33,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:33,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:33,720 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-07-19 21:18:33,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 271 transitions, 592 flow. Second operand has 10 states, 10 states have (on average 267.3) internal successors, (2673), 10 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:33,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-07-19 21:18:33,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:33,847 INFO L129 PetriNetUnfolder]: 0/392 cut-off events. [2022-07-19 21:18:33,848 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:18:33,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 502 conditions, 392 events. 0/392 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1098 event pairs, 0 based on Foata normal form. 2/394 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-19 21:18:33,849 INFO L132 encePairwiseOnDemand]: 328/334 looper letters, 18 selfloop transitions, 9 changer transitions 0/281 dead transitions. [2022-07-19 21:18:33,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 281 transitions, 668 flow [2022-07-19 21:18:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2414 transitions. [2022-07-19 21:18:33,851 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8030605455755156 [2022-07-19 21:18:33,851 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2414 transitions. [2022-07-19 21:18:33,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2414 transitions. [2022-07-19 21:18:33,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:33,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2414 transitions. [2022-07-19 21:18:33,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 268.22222222222223) internal successors, (2414), 9 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,858 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,858 INFO L186 Difference]: Start difference. First operand has 301 places, 271 transitions, 592 flow. Second operand 9 states and 2414 transitions. [2022-07-19 21:18:33,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 281 transitions, 668 flow [2022-07-19 21:18:33,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 281 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:33,862 INFO L242 Difference]: Finished difference. Result has 300 places, 277 transitions, 640 flow [2022-07-19 21:18:33,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=640, PETRI_PLACES=300, PETRI_TRANSITIONS=277} [2022-07-19 21:18:33,863 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 1 predicate places. [2022-07-19 21:18:33,863 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 277 transitions, 640 flow [2022-07-19 21:18:33,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 267.3) internal successors, (2673), 10 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,863 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:33,864 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] [2022-07-19 21:18:33,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:34,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-19 21:18:34,081 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash -776023295, now seen corresponding path program 1 times [2022-07-19 21:18:34,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:34,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445515404] [2022-07-19 21:18:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:34,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:34,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:34,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445515404] [2022-07-19 21:18:34,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445515404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:34,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109456996] [2022-07-19 21:18:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:34,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:34,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:34,140 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:34,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:18:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:34,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:34,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:34,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:34,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109456996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:34,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:34,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150615153] [2022-07-19 21:18:34,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:34,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:34,379 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-07-19 21:18:34,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 277 transitions, 640 flow. Second operand has 18 states, 18 states have (on average 267.6111111111111) internal successors, (4817), 18 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:34,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-07-19 21:18:34,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:34,568 INFO L129 PetriNetUnfolder]: 0/348 cut-off events. [2022-07-19 21:18:34,568 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-19 21:18:34,568 INFO L84 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 348 events. 0/348 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 804 event pairs, 0 based on Foata normal form. 4/352 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-19 21:18:34,569 INFO L132 encePairwiseOnDemand]: 328/334 looper letters, 26 selfloop transitions, 21 changer transitions 0/301 dead transitions. [2022-07-19 21:18:34,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 301 transitions, 842 flow [2022-07-19 21:18:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5616 transitions. [2022-07-19 21:18:34,573 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8006843455945253 [2022-07-19 21:18:34,573 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5616 transitions. [2022-07-19 21:18:34,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5616 transitions. [2022-07-19 21:18:34,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:34,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5616 transitions. [2022-07-19 21:18:34,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 267.42857142857144) internal successors, (5616), 21 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 334.0) internal successors, (7348), 22 states have internal predecessors, (7348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,588 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 334.0) internal successors, (7348), 22 states have internal predecessors, (7348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,588 INFO L186 Difference]: Start difference. First operand has 300 places, 277 transitions, 640 flow. Second operand 21 states and 5616 transitions. [2022-07-19 21:18:34,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 301 transitions, 842 flow [2022-07-19 21:18:34,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 301 transitions, 828 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:34,593 INFO L242 Difference]: Finished difference. Result has 324 places, 290 transitions, 764 flow [2022-07-19 21:18:34,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=764, PETRI_PLACES=324, PETRI_TRANSITIONS=290} [2022-07-19 21:18:34,594 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 25 predicate places. [2022-07-19 21:18:34,594 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 290 transitions, 764 flow [2022-07-19 21:18:34,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 267.6111111111111) internal successors, (4817), 18 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:34,595 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:34,595 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] [2022-07-19 21:18:34,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:34,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-19 21:18:34,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1408771997, now seen corresponding path program 1 times [2022-07-19 21:18:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:34,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933437291] [2022-07-19 21:18:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:34,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:34,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:34,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933437291] [2022-07-19 21:18:34,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933437291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:34,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905004105] [2022-07-19 21:18:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:34,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:34,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:34,946 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:34,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:18:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:35,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:35,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905004105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:35,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:35,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098264969] [2022-07-19 21:18:35,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:35,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:35,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:35,407 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-07-19 21:18:35,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 290 transitions, 764 flow. Second operand has 34 states, 34 states have (on average 267.79411764705884) internal successors, (9105), 34 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:35,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-07-19 21:18:35,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:35,692 INFO L129 PetriNetUnfolder]: 0/326 cut-off events. [2022-07-19 21:18:35,692 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-19 21:18:35,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 326 events. 0/326 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-19 21:18:35,693 INFO L132 encePairwiseOnDemand]: 329/334 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-07-19 21:18:35,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 296 transitions, 912 flow [2022-07-19 21:18:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 21:18:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-19 21:18:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7209 transitions. [2022-07-19 21:18:35,699 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7994011976047904 [2022-07-19 21:18:35,699 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7209 transitions. [2022-07-19 21:18:35,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7209 transitions. [2022-07-19 21:18:35,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:35,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7209 transitions. [2022-07-19 21:18:35,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 267.0) internal successors, (7209), 27 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 334.0) internal successors, (9352), 28 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,715 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 334.0) internal successors, (9352), 28 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,715 INFO L186 Difference]: Start difference. First operand has 324 places, 290 transitions, 764 flow. Second operand 27 states and 7209 transitions. [2022-07-19 21:18:35,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 296 transitions, 912 flow [2022-07-19 21:18:35,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:35,720 INFO L242 Difference]: Finished difference. Result has 326 places, 282 transitions, 751 flow [2022-07-19 21:18:35,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=751, PETRI_PLACES=326, PETRI_TRANSITIONS=282} [2022-07-19 21:18:35,721 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 27 predicate places. [2022-07-19 21:18:35,721 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 282 transitions, 751 flow [2022-07-19 21:18:35,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 267.79411764705884) internal successors, (9105), 34 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:35,723 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:35,723 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:35,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:35,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-19 21:18:35,959 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash 22455350, now seen corresponding path program 1 times [2022-07-19 21:18:35,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:35,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090713935] [2022-07-19 21:18:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:35,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:35,987 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:36,007 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:36,015 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:36,019 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:36,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:36,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-19 21:18:36,019 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:36,020 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:36,020 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-19 21:18:36,050 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:36,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 328 places, 367 transitions, 851 flow [2022-07-19 21:18:36,150 INFO L129 PetriNetUnfolder]: 94/686 cut-off events. [2022-07-19 21:18:36,150 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-19 21:18:36,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 686 events. 94/686 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2360 event pairs, 0 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 660. Up to 20 conditions per place. [2022-07-19 21:18:36,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 367 transitions, 851 flow [2022-07-19 21:18:36,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 328 places, 367 transitions, 851 flow [2022-07-19 21:18:36,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:36,174 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:36,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:36,177 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-19 21:18:36,177 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:36,177 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:36,177 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] [2022-07-19 21:18:36,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1955489826, now seen corresponding path program 1 times [2022-07-19 21:18:36,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:36,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784135875] [2022-07-19 21:18:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:36,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:36,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:36,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784135875] [2022-07-19 21:18:36,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784135875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:36,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:36,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:36,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973633348] [2022-07-19 21:18:36,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:36,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:36,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:36,192 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 367 [2022-07-19 21:18:36,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 367 transitions, 851 flow. Second operand has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:36,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 367 [2022-07-19 21:18:36,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:36,294 INFO L129 PetriNetUnfolder]: 0/560 cut-off events. [2022-07-19 21:18:36,295 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-19 21:18:36,295 INFO L84 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 560 events. 0/560 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2050 event pairs, 0 based on Foata normal form. 1312/1854 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-19 21:18:36,296 INFO L132 encePairwiseOnDemand]: 306/367 looper letters, 18 selfloop transitions, 2 changer transitions 11/312 dead transitions. [2022-07-19 21:18:36,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 312 transitions, 781 flow [2022-07-19 21:18:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2022-07-19 21:18:36,318 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8737511353315168 [2022-07-19 21:18:36,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2022-07-19 21:18:36,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2022-07-19 21:18:36,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:36,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2022-07-19 21:18:36,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,320 INFO L186 Difference]: Start difference. First operand has 328 places, 367 transitions, 851 flow. Second operand 3 states and 962 transitions. [2022-07-19 21:18:36,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 312 transitions, 781 flow [2022-07-19 21:18:36,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 312 transitions, 709 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:36,324 INFO L242 Difference]: Finished difference. Result has 330 places, 298 transitions, 651 flow [2022-07-19 21:18:36,324 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=651, PETRI_PLACES=330, PETRI_TRANSITIONS=298} [2022-07-19 21:18:36,325 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 2 predicate places. [2022-07-19 21:18:36,325 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 298 transitions, 651 flow [2022-07-19 21:18:36,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,325 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:36,325 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] [2022-07-19 21:18:36,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-19 21:18:36,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:36,325 INFO L85 PathProgramCache]: Analyzing trace with hash -733998826, now seen corresponding path program 1 times [2022-07-19 21:18:36,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:36,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632110863] [2022-07-19 21:18:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:36,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:36,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632110863] [2022-07-19 21:18:36,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632110863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596530591] [2022-07-19 21:18:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:36,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:36,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:36,347 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:36,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:18:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:36,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:36,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:36,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596530591] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:36,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:36,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:36,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171089722] [2022-07-19 21:18:36,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:36,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:36,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:36,542 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-07-19 21:18:36,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 298 transitions, 651 flow. Second operand has 10 states, 10 states have (on average 293.3) internal successors, (2933), 10 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,543 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:36,543 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-07-19 21:18:36,543 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:36,717 INFO L129 PetriNetUnfolder]: 0/439 cut-off events. [2022-07-19 21:18:36,717 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-19 21:18:36,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 439 events. 0/439 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1262 event pairs, 0 based on Foata normal form. 2/441 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-19 21:18:36,718 INFO L132 encePairwiseOnDemand]: 361/367 looper letters, 19 selfloop transitions, 9 changer transitions 0/308 dead transitions. [2022-07-19 21:18:36,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 308 transitions, 729 flow [2022-07-19 21:18:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2649 transitions. [2022-07-19 21:18:36,733 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8019981834695731 [2022-07-19 21:18:36,733 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2649 transitions. [2022-07-19 21:18:36,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2649 transitions. [2022-07-19 21:18:36,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:36,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2649 transitions. [2022-07-19 21:18:36,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 294.3333333333333) internal successors, (2649), 9 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,738 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,738 INFO L186 Difference]: Start difference. First operand has 330 places, 298 transitions, 651 flow. Second operand 9 states and 2649 transitions. [2022-07-19 21:18:36,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 308 transitions, 729 flow [2022-07-19 21:18:36,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 308 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:36,742 INFO L242 Difference]: Finished difference. Result has 329 places, 304 transitions, 699 flow [2022-07-19 21:18:36,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=699, PETRI_PLACES=329, PETRI_TRANSITIONS=304} [2022-07-19 21:18:36,743 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 1 predicate places. [2022-07-19 21:18:36,743 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 304 transitions, 699 flow [2022-07-19 21:18:36,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 293.3) internal successors, (2933), 10 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:36,743 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:36,743 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] [2022-07-19 21:18:36,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:36,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:36,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash -457798463, now seen corresponding path program 1 times [2022-07-19 21:18:36,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:36,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354796283] [2022-07-19 21:18:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:36,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:37,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:37,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354796283] [2022-07-19 21:18:37,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354796283] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:37,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79453170] [2022-07-19 21:18:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:37,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:37,004 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:37,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:18:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:37,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:37,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:37,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79453170] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:37,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:37,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:37,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361250638] [2022-07-19 21:18:37,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:37,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:37,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:37,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:37,273 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-07-19 21:18:37,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 304 transitions, 699 flow. Second operand has 18 states, 18 states have (on average 293.6111111111111) internal successors, (5285), 18 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:37,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:37,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-07-19 21:18:37,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:37,520 INFO L129 PetriNetUnfolder]: 0/395 cut-off events. [2022-07-19 21:18:37,520 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-19 21:18:37,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 395 events. 0/395 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 974 event pairs, 0 based on Foata normal form. 4/399 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-19 21:18:37,522 INFO L132 encePairwiseOnDemand]: 361/367 looper letters, 27 selfloop transitions, 21 changer transitions 0/328 dead transitions. [2022-07-19 21:18:37,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 328 transitions, 903 flow [2022-07-19 21:18:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6163 transitions. [2022-07-19 21:18:37,527 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7996626443492929 [2022-07-19 21:18:37,527 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6163 transitions. [2022-07-19 21:18:37,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6163 transitions. [2022-07-19 21:18:37,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:37,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6163 transitions. [2022-07-19 21:18:37,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 293.4761904761905) internal successors, (6163), 21 states have internal predecessors, (6163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:37,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:37,540 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:37,540 INFO L186 Difference]: Start difference. First operand has 329 places, 304 transitions, 699 flow. Second operand 21 states and 6163 transitions. [2022-07-19 21:18:37,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 328 transitions, 903 flow [2022-07-19 21:18:37,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 328 transitions, 889 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:37,545 INFO L242 Difference]: Finished difference. Result has 353 places, 317 transitions, 823 flow [2022-07-19 21:18:37,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=823, PETRI_PLACES=353, PETRI_TRANSITIONS=317} [2022-07-19 21:18:37,547 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 25 predicate places. [2022-07-19 21:18:37,547 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 317 transitions, 823 flow [2022-07-19 21:18:37,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 293.6111111111111) internal successors, (5285), 18 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:37,548 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:37,548 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] [2022-07-19 21:18:37,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-19 21:18:37,763 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,SelfDestructingSolverStorable36 [2022-07-19 21:18:37,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:37,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:37,764 INFO L85 PathProgramCache]: Analyzing trace with hash 110716963, now seen corresponding path program 1 times [2022-07-19 21:18:37,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:37,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816083523] [2022-07-19 21:18:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:37,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:37,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:37,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816083523] [2022-07-19 21:18:37,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816083523] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:37,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065137970] [2022-07-19 21:18:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:37,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:37,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:37,899 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:37,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 21:18:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:38,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:38,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:38,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:38,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065137970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:38,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:38,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:38,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337578926] [2022-07-19 21:18:38,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:38,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:38,362 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-07-19 21:18:38,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 317 transitions, 823 flow. Second operand has 34 states, 34 states have (on average 293.79411764705884) internal successors, (9989), 34 states have internal predecessors, (9989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:38,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-07-19 21:18:38,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:38,687 INFO L129 PetriNetUnfolder]: 0/362 cut-off events. [2022-07-19 21:18:38,687 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-19 21:18:38,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 362 events. 0/362 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-19 21:18:38,688 INFO L132 encePairwiseOnDemand]: 362/367 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-07-19 21:18:38,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 328 transitions, 1017 flow [2022-07-19 21:18:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 21:18:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-19 21:18:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8791 transitions. [2022-07-19 21:18:38,693 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.798455949137148 [2022-07-19 21:18:38,693 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8791 transitions. [2022-07-19 21:18:38,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8791 transitions. [2022-07-19 21:18:38,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:38,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8791 transitions. [2022-07-19 21:18:38,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 293.03333333333336) internal successors, (8791), 30 states have internal predecessors, (8791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 367.0) internal successors, (11377), 31 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,710 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 367.0) internal successors, (11377), 31 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,710 INFO L186 Difference]: Start difference. First operand has 353 places, 317 transitions, 823 flow. Second operand 30 states and 8791 transitions. [2022-07-19 21:18:38,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 328 transitions, 1017 flow [2022-07-19 21:18:38,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:38,715 INFO L242 Difference]: Finished difference. Result has 358 places, 312 transitions, 834 flow [2022-07-19 21:18:38,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=834, PETRI_PLACES=358, PETRI_TRANSITIONS=312} [2022-07-19 21:18:38,716 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 30 predicate places. [2022-07-19 21:18:38,716 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 312 transitions, 834 flow [2022-07-19 21:18:38,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 293.79411764705884) internal successors, (9989), 34 states have internal predecessors, (9989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:38,717 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:38,717 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:38,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:38,936 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,SelfDestructingSolverStorable37 [2022-07-19 21:18:38,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash -209069326, now seen corresponding path program 1 times [2022-07-19 21:18:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:38,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192284879] [2022-07-19 21:18:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:38,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:38,964 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:38,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:38,991 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:38,991 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:38,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:38,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-19 21:18:38,992 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:38,992 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:38,992 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-19 21:18:39,015 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:39,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 357 places, 400 transitions, 940 flow [2022-07-19 21:18:39,121 INFO L129 PetriNetUnfolder]: 104/755 cut-off events. [2022-07-19 21:18:39,121 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-19 21:18:39,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 755 events. 104/755 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2595 event pairs, 0 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 739. Up to 22 conditions per place. [2022-07-19 21:18:39,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 400 transitions, 940 flow [2022-07-19 21:18:39,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 400 transitions, 940 flow [2022-07-19 21:18:39,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:39,149 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:39,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:39,152 INFO L129 PetriNetUnfolder]: 5/82 cut-off events. [2022-07-19 21:18:39,152 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:39,152 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,152 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:39,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,153 INFO L85 PathProgramCache]: Analyzing trace with hash -312573599, now seen corresponding path program 1 times [2022-07-19 21:18:39,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112492181] [2022-07-19 21:18:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112492181] [2022-07-19 21:18:39,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112492181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:39,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:39,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:39,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401132978] [2022-07-19 21:18:39,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:39,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:39,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:39,165 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 400 [2022-07-19 21:18:39,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 400 transitions, 940 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 400 [2022-07-19 21:18:39,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,287 INFO L129 PetriNetUnfolder]: 0/640 cut-off events. [2022-07-19 21:18:39,288 INFO L130 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-07-19 21:18:39,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 640 events. 0/640 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2413 event pairs, 0 based on Foata normal form. 322/940 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-19 21:18:39,289 INFO L132 encePairwiseOnDemand]: 336/400 looper letters, 10 selfloop transitions, 0 changer transitions 11/335 dead transitions. [2022-07-19 21:18:39,289 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 830 flow [2022-07-19 21:18:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 724 transitions. [2022-07-19 21:18:39,290 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.905 [2022-07-19 21:18:39,290 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 724 transitions. [2022-07-19 21:18:39,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 724 transitions. [2022-07-19 21:18:39,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 724 transitions. [2022-07-19 21:18:39,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 362.0) internal successors, (724), 2 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,292 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,292 INFO L186 Difference]: Start difference. First operand has 357 places, 400 transitions, 940 flow. Second operand 2 states and 724 transitions. [2022-07-19 21:18:39,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 830 flow [2022-07-19 21:18:39,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 335 transitions, 740 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:39,296 INFO L242 Difference]: Finished difference. Result has 357 places, 324 transitions, 698 flow [2022-07-19 21:18:39,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=698, PETRI_PLACES=357, PETRI_TRANSITIONS=324} [2022-07-19 21:18:39,297 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 0 predicate places. [2022-07-19 21:18:39,297 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 324 transitions, 698 flow [2022-07-19 21:18:39,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,297 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,297 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] [2022-07-19 21:18:39,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-19 21:18:39,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2109524958, now seen corresponding path program 1 times [2022-07-19 21:18:39,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625052836] [2022-07-19 21:18:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625052836] [2022-07-19 21:18:39,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625052836] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:39,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:39,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:39,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936421387] [2022-07-19 21:18:39,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:39,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:39,310 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 400 [2022-07-19 21:18:39,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 324 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 400 [2022-07-19 21:18:39,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,405 INFO L129 PetriNetUnfolder]: 0/508 cut-off events. [2022-07-19 21:18:39,405 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-19 21:18:39,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 508 events. 0/508 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1561 event pairs, 0 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-19 21:18:39,407 INFO L132 encePairwiseOnDemand]: 397/400 looper letters, 19 selfloop transitions, 2 changer transitions 0/328 dead transitions. [2022-07-19 21:18:39,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 328 transitions, 748 flow [2022-07-19 21:18:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2022-07-19 21:18:39,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8133333333333334 [2022-07-19 21:18:39,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2022-07-19 21:18:39,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2022-07-19 21:18:39,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2022-07-19 21:18:39,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,410 INFO L186 Difference]: Start difference. First operand has 357 places, 324 transitions, 698 flow. Second operand 3 states and 976 transitions. [2022-07-19 21:18:39,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 328 transitions, 748 flow [2022-07-19 21:18:39,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 328 transitions, 748 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:39,414 INFO L242 Difference]: Finished difference. Result has 349 places, 325 transitions, 710 flow [2022-07-19 21:18:39,415 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=349, PETRI_TRANSITIONS=325} [2022-07-19 21:18:39,415 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, -8 predicate places. [2022-07-19 21:18:39,415 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 325 transitions, 710 flow [2022-07-19 21:18:39,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,415 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,415 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:39,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-19 21:18:39,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1154115786, now seen corresponding path program 1 times [2022-07-19 21:18:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236345471] [2022-07-19 21:18:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236345471] [2022-07-19 21:18:39,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236345471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:39,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577646336] [2022-07-19 21:18:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:39,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:39,453 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:39,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 21:18:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:39,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577646336] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:39,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:39,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:39,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158573333] [2022-07-19 21:18:39,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:39,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:39,623 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-07-19 21:18:39,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 325 transitions, 710 flow. Second operand has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-07-19 21:18:39,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,770 INFO L129 PetriNetUnfolder]: 0/486 cut-off events. [2022-07-19 21:18:39,770 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-19 21:18:39,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 486 events. 0/486 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1432 event pairs, 0 based on Foata normal form. 2/488 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-19 21:18:39,772 INFO L132 encePairwiseOnDemand]: 394/400 looper letters, 20 selfloop transitions, 9 changer transitions 0/335 dead transitions. [2022-07-19 21:18:39,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 790 flow [2022-07-19 21:18:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2884 transitions. [2022-07-19 21:18:39,774 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8011111111111111 [2022-07-19 21:18:39,774 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2884 transitions. [2022-07-19 21:18:39,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2884 transitions. [2022-07-19 21:18:39,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2884 transitions. [2022-07-19 21:18:39,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.44444444444446) internal successors, (2884), 9 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,779 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,779 INFO L186 Difference]: Start difference. First operand has 349 places, 325 transitions, 710 flow. Second operand 9 states and 2884 transitions. [2022-07-19 21:18:39,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 790 flow [2022-07-19 21:18:39,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 335 transitions, 788 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:39,786 INFO L242 Difference]: Finished difference. Result has 359 places, 331 transitions, 758 flow [2022-07-19 21:18:39,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=758, PETRI_PLACES=359, PETRI_TRANSITIONS=331} [2022-07-19 21:18:39,788 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 2 predicate places. [2022-07-19 21:18:39,788 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 331 transitions, 758 flow [2022-07-19 21:18:39,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,788 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,788 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:39,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:39,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:40,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1243680545, now seen corresponding path program 1 times [2022-07-19 21:18:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:40,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301091585] [2022-07-19 21:18:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:40,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301091585] [2022-07-19 21:18:40,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301091585] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:40,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270767263] [2022-07-19 21:18:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:40,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:40,084 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:40,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 21:18:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270767263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:40,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:40,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:40,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961426929] [2022-07-19 21:18:40,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:40,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:40,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:40,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:40,324 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-07-19 21:18:40,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 331 transitions, 758 flow. Second operand has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:40,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-07-19 21:18:40,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:40,555 INFO L129 PetriNetUnfolder]: 0/442 cut-off events. [2022-07-19 21:18:40,556 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-19 21:18:40,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 442 events. 0/442 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1144 event pairs, 0 based on Foata normal form. 4/446 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-19 21:18:40,560 INFO L132 encePairwiseOnDemand]: 394/400 looper letters, 28 selfloop transitions, 21 changer transitions 0/355 dead transitions. [2022-07-19 21:18:40,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 355 transitions, 964 flow [2022-07-19 21:18:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6710 transitions. [2022-07-19 21:18:40,564 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7988095238095239 [2022-07-19 21:18:40,564 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6710 transitions. [2022-07-19 21:18:40,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6710 transitions. [2022-07-19 21:18:40,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:40,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6710 transitions. [2022-07-19 21:18:40,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 319.5238095238095) internal successors, (6710), 21 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,573 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,573 INFO L186 Difference]: Start difference. First operand has 359 places, 331 transitions, 758 flow. Second operand 21 states and 6710 transitions. [2022-07-19 21:18:40,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 355 transitions, 964 flow [2022-07-19 21:18:40,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 355 transitions, 950 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:40,581 INFO L242 Difference]: Finished difference. Result has 383 places, 344 transitions, 882 flow [2022-07-19 21:18:40,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=882, PETRI_PLACES=383, PETRI_TRANSITIONS=344} [2022-07-19 21:18:40,582 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 26 predicate places. [2022-07-19 21:18:40,582 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 344 transitions, 882 flow [2022-07-19 21:18:40,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,582 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:40,583 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] [2022-07-19 21:18:40,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:40,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:40,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1389100285, now seen corresponding path program 1 times [2022-07-19 21:18:40,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:40,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227861996] [2022-07-19 21:18:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:40,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227861996] [2022-07-19 21:18:40,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227861996] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:40,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065296728] [2022-07-19 21:18:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:40,944 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:40,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 21:18:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:41,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:41,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:41,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065296728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:41,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:41,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:41,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189691900] [2022-07-19 21:18:41,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:41,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:41,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:41,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:41,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:41,425 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-07-19 21:18:41,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 344 transitions, 882 flow. Second operand has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:41,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-07-19 21:18:41,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:41,816 INFO L129 PetriNetUnfolder]: 0/398 cut-off events. [2022-07-19 21:18:41,816 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-19 21:18:41,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 398 events. 0/398 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-19 21:18:41,817 INFO L132 encePairwiseOnDemand]: 395/400 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-07-19 21:18:41,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-07-19 21:18:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 21:18:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-19 21:18:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10529 transitions. [2022-07-19 21:18:41,824 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7976515151515151 [2022-07-19 21:18:41,824 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10529 transitions. [2022-07-19 21:18:41,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10529 transitions. [2022-07-19 21:18:41,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:41,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10529 transitions. [2022-07-19 21:18:41,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 319.06060606060606) internal successors, (10529), 33 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 400.0) internal successors, (13600), 34 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,845 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 400.0) internal successors, (13600), 34 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,845 INFO L186 Difference]: Start difference. First operand has 383 places, 344 transitions, 882 flow. Second operand 33 states and 10529 transitions. [2022-07-19 21:18:41,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-07-19 21:18:41,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:41,851 INFO L242 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-07-19 21:18:41,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=917, PETRI_PLACES=391, PETRI_TRANSITIONS=342} [2022-07-19 21:18:41,851 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 34 predicate places. [2022-07-19 21:18:41,851 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-07-19 21:18:41,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:41,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:41,853 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:41,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-19 21:18:42,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:42,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:42,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2124296463, now seen corresponding path program 1 times [2022-07-19 21:18:42,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:42,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164203666] [2022-07-19 21:18:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:42,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:42,104 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:42,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:42,140 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:42,140 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:42,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:42,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-19 21:18:42,140 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:18:42,141 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:42,141 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-19 21:18:42,163 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:42,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 386 places, 433 transitions, 1031 flow [2022-07-19 21:18:42,285 INFO L129 PetriNetUnfolder]: 114/824 cut-off events. [2022-07-19 21:18:42,286 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-07-19 21:18:42,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 824 events. 114/824 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2879 event pairs, 0 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 819. Up to 24 conditions per place. [2022-07-19 21:18:42,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 433 transitions, 1031 flow [2022-07-19 21:18:42,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 433 transitions, 1031 flow [2022-07-19 21:18:42,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:42,319 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:42,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:42,322 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-19 21:18:42,322 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:42,322 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:42,322 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:42,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:42,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:42,323 INFO L85 PathProgramCache]: Analyzing trace with hash 544580322, now seen corresponding path program 1 times [2022-07-19 21:18:42,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:42,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290822691] [2022-07-19 21:18:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:42,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:42,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:42,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290822691] [2022-07-19 21:18:42,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290822691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:42,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:42,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:42,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288001207] [2022-07-19 21:18:42,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:42,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:42,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:42,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:42,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:42,336 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 433 [2022-07-19 21:18:42,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 433 transitions, 1031 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:42,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 433 [2022-07-19 21:18:42,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:42,506 INFO L129 PetriNetUnfolder]: 0/676 cut-off events. [2022-07-19 21:18:42,507 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-07-19 21:18:42,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 676 events. 0/676 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2562 event pairs, 0 based on Foata normal form. 1993/2647 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-07-19 21:18:42,508 INFO L132 encePairwiseOnDemand]: 360/433 looper letters, 20 selfloop transitions, 2 changer transitions 11/366 dead transitions. [2022-07-19 21:18:42,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 366 transitions, 941 flow [2022-07-19 21:18:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1132 transitions. [2022-07-19 21:18:42,510 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8714395688991532 [2022-07-19 21:18:42,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1132 transitions. [2022-07-19 21:18:42,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1132 transitions. [2022-07-19 21:18:42,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:42,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1132 transitions. [2022-07-19 21:18:42,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.3333333333333) internal successors, (1132), 3 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,512 INFO L186 Difference]: Start difference. First operand has 386 places, 433 transitions, 1031 flow. Second operand 3 states and 1132 transitions. [2022-07-19 21:18:42,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 366 transitions, 941 flow [2022-07-19 21:18:42,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 366 transitions, 831 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:42,517 INFO L242 Difference]: Finished difference. Result has 388 places, 352 transitions, 769 flow [2022-07-19 21:18:42,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=769, PETRI_PLACES=388, PETRI_TRANSITIONS=352} [2022-07-19 21:18:42,518 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 2 predicate places. [2022-07-19 21:18:42,518 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 352 transitions, 769 flow [2022-07-19 21:18:42,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,518 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:42,519 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] [2022-07-19 21:18:42,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-19 21:18:42,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash -382004042, now seen corresponding path program 1 times [2022-07-19 21:18:42,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:42,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415413206] [2022-07-19 21:18:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:42,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:42,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:42,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415413206] [2022-07-19 21:18:42,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415413206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:42,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194168901] [2022-07-19 21:18:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:42,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:42,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:42,542 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:42,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 21:18:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:42,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:42,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:42,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:42,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194168901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:42,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:42,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:42,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913434385] [2022-07-19 21:18:42,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:42,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:42,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:42,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:42,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:42,739 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-07-19 21:18:42,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 352 transitions, 769 flow. Second operand has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:42,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-07-19 21:18:42,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:42,908 INFO L129 PetriNetUnfolder]: 0/533 cut-off events. [2022-07-19 21:18:42,909 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-19 21:18:42,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 533 events. 0/533 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1602 event pairs, 0 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-19 21:18:42,910 INFO L132 encePairwiseOnDemand]: 427/433 looper letters, 21 selfloop transitions, 9 changer transitions 0/362 dead transitions. [2022-07-19 21:18:42,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 362 transitions, 851 flow [2022-07-19 21:18:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3119 transitions. [2022-07-19 21:18:42,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.800359250705671 [2022-07-19 21:18:42,913 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3119 transitions. [2022-07-19 21:18:42,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3119 transitions. [2022-07-19 21:18:42,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:42,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3119 transitions. [2022-07-19 21:18:42,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 346.55555555555554) internal successors, (3119), 9 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,918 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,918 INFO L186 Difference]: Start difference. First operand has 388 places, 352 transitions, 769 flow. Second operand 9 states and 3119 transitions. [2022-07-19 21:18:42,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 362 transitions, 851 flow [2022-07-19 21:18:42,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 362 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:42,925 INFO L242 Difference]: Finished difference. Result has 387 places, 358 transitions, 817 flow [2022-07-19 21:18:42,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=817, PETRI_PLACES=387, PETRI_TRANSITIONS=358} [2022-07-19 21:18:42,927 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 1 predicate places. [2022-07-19 21:18:42,927 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 358 transitions, 817 flow [2022-07-19 21:18:42,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:42,927 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:42,927 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] [2022-07-19 21:18:42,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:43,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-19 21:18:43,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash 33446433, now seen corresponding path program 1 times [2022-07-19 21:18:43,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:43,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961965546] [2022-07-19 21:18:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:43,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:43,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:43,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961965546] [2022-07-19 21:18:43,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961965546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:43,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923354514] [2022-07-19 21:18:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:43,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:43,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:43,201 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:43,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 21:18:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:43,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:43,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:43,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:43,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923354514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:43,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:43,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:43,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777737429] [2022-07-19 21:18:43,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:43,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:43,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:43,489 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-07-19 21:18:43,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 358 transitions, 817 flow. Second operand has 18 states, 18 states have (on average 345.6111111111111) internal successors, (6221), 18 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:43,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:43,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-07-19 21:18:43,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:43,732 INFO L129 PetriNetUnfolder]: 0/489 cut-off events. [2022-07-19 21:18:43,732 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-07-19 21:18:43,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 489 events. 0/489 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1314 event pairs, 0 based on Foata normal form. 4/493 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-19 21:18:43,733 INFO L132 encePairwiseOnDemand]: 427/433 looper letters, 29 selfloop transitions, 21 changer transitions 0/382 dead transitions. [2022-07-19 21:18:43,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 382 transitions, 1025 flow [2022-07-19 21:18:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7257 transitions. [2022-07-19 21:18:43,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7980864401187727 [2022-07-19 21:18:43,738 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7257 transitions. [2022-07-19 21:18:43,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7257 transitions. [2022-07-19 21:18:43,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:43,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7257 transitions. [2022-07-19 21:18:43,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 345.57142857142856) internal successors, (7257), 21 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:43,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 433.0) internal successors, (9526), 22 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:43,748 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 433.0) internal successors, (9526), 22 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:43,748 INFO L186 Difference]: Start difference. First operand has 387 places, 358 transitions, 817 flow. Second operand 21 states and 7257 transitions. [2022-07-19 21:18:43,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 382 transitions, 1025 flow [2022-07-19 21:18:43,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 382 transitions, 1011 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:43,753 INFO L242 Difference]: Finished difference. Result has 411 places, 371 transitions, 941 flow [2022-07-19 21:18:43,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=941, PETRI_PLACES=411, PETRI_TRANSITIONS=371} [2022-07-19 21:18:43,754 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 25 predicate places. [2022-07-19 21:18:43,754 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 371 transitions, 941 flow [2022-07-19 21:18:43,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 345.6111111111111) internal successors, (6221), 18 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:43,755 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:43,755 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] [2022-07-19 21:18:43,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:43,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-19 21:18:43,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:43,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1613256445, now seen corresponding path program 1 times [2022-07-19 21:18:43,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:43,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462574830] [2022-07-19 21:18:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:43,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:44,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:44,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462574830] [2022-07-19 21:18:44,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462574830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:44,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672193645] [2022-07-19 21:18:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:44,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:44,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:44,124 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:44,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 21:18:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:44,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:44,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:44,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:44,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672193645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:44,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:44,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:44,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973132261] [2022-07-19 21:18:44,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:44,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:44,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:44,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:44,604 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-07-19 21:18:44,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 371 transitions, 941 flow. Second operand has 34 states, 34 states have (on average 345.79411764705884) internal successors, (11757), 34 states have internal predecessors, (11757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:44,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:44,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-07-19 21:18:44,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:45,010 INFO L129 PetriNetUnfolder]: 0/434 cut-off events. [2022-07-19 21:18:45,011 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-19 21:18:45,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 434 events. 0/434 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-19 21:18:45,012 INFO L132 encePairwiseOnDemand]: 428/433 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-07-19 21:18:45,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 392 transitions, 1227 flow [2022-07-19 21:18:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 21:18:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-19 21:18:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12423 transitions. [2022-07-19 21:18:45,018 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969591993841416 [2022-07-19 21:18:45,018 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12423 transitions. [2022-07-19 21:18:45,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12423 transitions. [2022-07-19 21:18:45,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:45,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12423 transitions. [2022-07-19 21:18:45,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 345.0833333333333) internal successors, (12423), 36 states have internal predecessors, (12423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 433.0) internal successors, (16021), 37 states have internal predecessors, (16021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,036 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 433.0) internal successors, (16021), 37 states have internal predecessors, (16021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,036 INFO L186 Difference]: Start difference. First operand has 411 places, 371 transitions, 941 flow. Second operand 36 states and 12423 transitions. [2022-07-19 21:18:45,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 392 transitions, 1227 flow [2022-07-19 21:18:45,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:45,042 INFO L242 Difference]: Finished difference. Result has 422 places, 372 transitions, 1000 flow [2022-07-19 21:18:45,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1000, PETRI_PLACES=422, PETRI_TRANSITIONS=372} [2022-07-19 21:18:45,043 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 36 predicate places. [2022-07-19 21:18:45,043 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 372 transitions, 1000 flow [2022-07-19 21:18:45,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 345.79411764705884) internal successors, (11757), 34 states have internal predecessors, (11757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,044 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:45,045 INFO L200 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:45,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:45,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-19 21:18:45,262 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:45,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:45,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1736277805, now seen corresponding path program 1 times [2022-07-19 21:18:45,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:45,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513910024] [2022-07-19 21:18:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:45,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:45,281 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:45,308 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:45,308 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:45,308 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:45,308 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:45,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-19 21:18:45,309 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:45,310 WARN L231 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:45,310 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-07-19 21:18:45,334 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:45,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 415 places, 466 transitions, 1124 flow [2022-07-19 21:18:45,515 INFO L129 PetriNetUnfolder]: 124/893 cut-off events. [2022-07-19 21:18:45,515 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-19 21:18:45,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 893 events. 124/893 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3184 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 900. Up to 26 conditions per place. [2022-07-19 21:18:45,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 415 places, 466 transitions, 1124 flow [2022-07-19 21:18:45,549 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 415 places, 466 transitions, 1124 flow [2022-07-19 21:18:45,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:45,550 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:45,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:45,553 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2022-07-19 21:18:45,553 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:45,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:45,554 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] [2022-07-19 21:18:45,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1170144863, now seen corresponding path program 1 times [2022-07-19 21:18:45,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:45,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629597783] [2022-07-19 21:18:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:45,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:45,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:45,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629597783] [2022-07-19 21:18:45,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629597783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:45,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:45,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:45,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779552719] [2022-07-19 21:18:45,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:45,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:45,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:45,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:45,566 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 466 [2022-07-19 21:18:45,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 466 transitions, 1124 flow. Second operand has 2 states, 2 states have (on average 377.5) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:45,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 466 [2022-07-19 21:18:45,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:45,712 INFO L129 PetriNetUnfolder]: 0/756 cut-off events. [2022-07-19 21:18:45,712 INFO L130 PetriNetUnfolder]: For 430/430 co-relation queries the response was YES. [2022-07-19 21:18:45,713 INFO L84 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 756 events. 0/756 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2909 event pairs, 0 based on Foata normal form. 456/1186 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-19 21:18:45,714 INFO L132 encePairwiseOnDemand]: 390/466 looper letters, 12 selfloop transitions, 0 changer transitions 11/389 dead transitions. [2022-07-19 21:18:45,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 389 transitions, 994 flow [2022-07-19 21:18:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 842 transitions. [2022-07-19 21:18:45,715 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9034334763948498 [2022-07-19 21:18:45,715 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 842 transitions. [2022-07-19 21:18:45,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 842 transitions. [2022-07-19 21:18:45,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:45,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 842 transitions. [2022-07-19 21:18:45,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 421.0) internal successors, (842), 2 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 466.0) internal successors, (1398), 3 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,716 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 466.0) internal successors, (1398), 3 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,716 INFO L186 Difference]: Start difference. First operand has 415 places, 466 transitions, 1124 flow. Second operand 2 states and 842 transitions. [2022-07-19 21:18:45,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 389 transitions, 994 flow [2022-07-19 21:18:45,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 389 transitions, 862 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:45,722 INFO L242 Difference]: Finished difference. Result has 415 places, 378 transitions, 816 flow [2022-07-19 21:18:45,722 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=816, PETRI_PLACES=415, PETRI_TRANSITIONS=378} [2022-07-19 21:18:45,722 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 0 predicate places. [2022-07-19 21:18:45,722 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 378 transitions, 816 flow [2022-07-19 21:18:45,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 377.5) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,722 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:45,722 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] [2022-07-19 21:18:45,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-19 21:18:45,723 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:45,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1327871074, now seen corresponding path program 1 times [2022-07-19 21:18:45,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:45,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904251238] [2022-07-19 21:18:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:45,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:45,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:45,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904251238] [2022-07-19 21:18:45,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904251238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:45,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:45,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:45,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475743772] [2022-07-19 21:18:45,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:45,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:45,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:45,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:45,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:45,736 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 466 [2022-07-19 21:18:45,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 378 transitions, 816 flow. Second operand has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:45,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 466 [2022-07-19 21:18:45,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:45,876 INFO L129 PetriNetUnfolder]: 0/602 cut-off events. [2022-07-19 21:18:45,877 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-19 21:18:45,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 602 events. 0/602 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1901 event pairs, 0 based on Foata normal form. 0/590 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-07-19 21:18:45,878 INFO L132 encePairwiseOnDemand]: 463/466 looper letters, 21 selfloop transitions, 2 changer transitions 0/382 dead transitions. [2022-07-19 21:18:45,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 382 transitions, 870 flow [2022-07-19 21:18:45,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1134 transitions. [2022-07-19 21:18:45,879 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8111587982832618 [2022-07-19 21:18:45,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1134 transitions. [2022-07-19 21:18:45,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1134 transitions. [2022-07-19 21:18:45,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:45,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1134 transitions. [2022-07-19 21:18:45,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.0) internal successors, (1134), 3 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,885 INFO L186 Difference]: Start difference. First operand has 415 places, 378 transitions, 816 flow. Second operand 3 states and 1134 transitions. [2022-07-19 21:18:45,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 382 transitions, 870 flow [2022-07-19 21:18:45,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 382 transitions, 870 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:45,890 INFO L242 Difference]: Finished difference. Result has 407 places, 379 transitions, 828 flow [2022-07-19 21:18:45,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=828, PETRI_PLACES=407, PETRI_TRANSITIONS=379} [2022-07-19 21:18:45,894 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, -8 predicate places. [2022-07-19 21:18:45,894 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 379 transitions, 828 flow [2022-07-19 21:18:45,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:45,894 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:45,894 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:45,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-19 21:18:45,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1582336406, now seen corresponding path program 1 times [2022-07-19 21:18:45,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:45,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263132113] [2022-07-19 21:18:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:45,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:45,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263132113] [2022-07-19 21:18:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263132113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098060014] [2022-07-19 21:18:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:45,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:45,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:45,952 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:45,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 21:18:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:46,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:46,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:46,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098060014] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:46,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:46,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:46,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569957685] [2022-07-19 21:18:46,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:46,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:46,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:46,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:46,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:46,198 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-07-19 21:18:46,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 379 transitions, 828 flow. Second operand has 10 states, 10 states have (on average 371.3) internal successors, (3713), 10 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:46,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-07-19 21:18:46,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:46,366 INFO L129 PetriNetUnfolder]: 0/580 cut-off events. [2022-07-19 21:18:46,366 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-19 21:18:46,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 580 events. 0/580 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1782 event pairs, 0 based on Foata normal form. 2/582 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-19 21:18:46,367 INFO L132 encePairwiseOnDemand]: 460/466 looper letters, 22 selfloop transitions, 9 changer transitions 0/389 dead transitions. [2022-07-19 21:18:46,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 389 transitions, 912 flow [2022-07-19 21:18:46,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:46,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3354 transitions. [2022-07-19 21:18:46,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7997138769670958 [2022-07-19 21:18:46,370 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3354 transitions. [2022-07-19 21:18:46,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3354 transitions. [2022-07-19 21:18:46,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:46,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3354 transitions. [2022-07-19 21:18:46,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 372.6666666666667) internal successors, (3354), 9 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 466.0) internal successors, (4660), 10 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,374 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 466.0) internal successors, (4660), 10 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,374 INFO L186 Difference]: Start difference. First operand has 407 places, 379 transitions, 828 flow. Second operand 9 states and 3354 transitions. [2022-07-19 21:18:46,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 389 transitions, 912 flow [2022-07-19 21:18:46,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 389 transitions, 910 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:46,380 INFO L242 Difference]: Finished difference. Result has 417 places, 385 transitions, 876 flow [2022-07-19 21:18:46,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=876, PETRI_PLACES=417, PETRI_TRANSITIONS=385} [2022-07-19 21:18:46,380 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 2 predicate places. [2022-07-19 21:18:46,380 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 385 transitions, 876 flow [2022-07-19 21:18:46,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 371.3) internal successors, (3713), 10 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,381 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:46,381 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] [2022-07-19 21:18:46,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-19 21:18:46,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:46,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:46,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash 206466497, now seen corresponding path program 1 times [2022-07-19 21:18:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:46,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259561876] [2022-07-19 21:18:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:46,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:46,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:46,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259561876] [2022-07-19 21:18:46,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259561876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:46,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894269887] [2022-07-19 21:18:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:46,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:46,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:46,664 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:46,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 21:18:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:46,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:46,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:46,881 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:46,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:46,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894269887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:46,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:46,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725284859] [2022-07-19 21:18:46,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:46,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:46,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:46,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:46,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:46,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-07-19 21:18:46,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 385 transitions, 876 flow. Second operand has 18 states, 18 states have (on average 371.6111111111111) internal successors, (6689), 18 states have internal predecessors, (6689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:46,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:46,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-07-19 21:18:46,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:47,239 INFO L129 PetriNetUnfolder]: 0/536 cut-off events. [2022-07-19 21:18:47,239 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-07-19 21:18:47,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 536 events. 0/536 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1490 event pairs, 0 based on Foata normal form. 4/540 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-19 21:18:47,240 INFO L132 encePairwiseOnDemand]: 460/466 looper letters, 30 selfloop transitions, 21 changer transitions 0/409 dead transitions. [2022-07-19 21:18:47,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 409 transitions, 1086 flow [2022-07-19 21:18:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7804 transitions. [2022-07-19 21:18:47,245 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7974657674228489 [2022-07-19 21:18:47,245 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7804 transitions. [2022-07-19 21:18:47,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7804 transitions. [2022-07-19 21:18:47,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:47,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7804 transitions. [2022-07-19 21:18:47,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 371.6190476190476) internal successors, (7804), 21 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:47,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 466.0) internal successors, (10252), 22 states have internal predecessors, (10252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:47,255 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 466.0) internal successors, (10252), 22 states have internal predecessors, (10252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:47,255 INFO L186 Difference]: Start difference. First operand has 417 places, 385 transitions, 876 flow. Second operand 21 states and 7804 transitions. [2022-07-19 21:18:47,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 409 transitions, 1086 flow [2022-07-19 21:18:47,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 409 transitions, 1072 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:47,260 INFO L242 Difference]: Finished difference. Result has 441 places, 398 transitions, 1000 flow [2022-07-19 21:18:47,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1000, PETRI_PLACES=441, PETRI_TRANSITIONS=398} [2022-07-19 21:18:47,261 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 26 predicate places. [2022-07-19 21:18:47,261 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 398 transitions, 1000 flow [2022-07-19 21:18:47,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 371.6111111111111) internal successors, (6689), 18 states have internal predecessors, (6689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:47,262 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:47,262 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] [2022-07-19 21:18:47,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:47,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:47,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash -561751517, now seen corresponding path program 1 times [2022-07-19 21:18:47,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624595310] [2022-07-19 21:18:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:47,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:47,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:47,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624595310] [2022-07-19 21:18:47,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624595310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:47,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003938041] [2022-07-19 21:18:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:47,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:47,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:47,604 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:47,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 21:18:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:47,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:47,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:48,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003938041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:48,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:48,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:48,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009014374] [2022-07-19 21:18:48,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:48,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:48,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:48,100 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-07-19 21:18:48,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 398 transitions, 1000 flow. Second operand has 34 states, 34 states have (on average 371.79411764705884) internal successors, (12641), 34 states have internal predecessors, (12641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:48,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-07-19 21:18:48,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:48,592 INFO L129 PetriNetUnfolder]: 0/470 cut-off events. [2022-07-19 21:18:48,592 INFO L130 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-07-19 21:18:48,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 470 events. 0/470 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1071 event pairs, 0 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-07-19 21:18:48,593 INFO L132 encePairwiseOnDemand]: 461/466 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-07-19 21:18:48,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 424 transitions, 1332 flow [2022-07-19 21:18:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 21:18:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-19 21:18:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14473 transitions. [2022-07-19 21:18:48,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7963574336964895 [2022-07-19 21:18:48,601 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14473 transitions. [2022-07-19 21:18:48,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14473 transitions. [2022-07-19 21:18:48,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:48,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14473 transitions. [2022-07-19 21:18:48,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 371.1025641025641) internal successors, (14473), 39 states have internal predecessors, (14473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 466.0) internal successors, (18640), 40 states have internal predecessors, (18640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,622 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 466.0) internal successors, (18640), 40 states have internal predecessors, (18640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,622 INFO L186 Difference]: Start difference. First operand has 441 places, 398 transitions, 1000 flow. Second operand 39 states and 14473 transitions. [2022-07-19 21:18:48,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 424 transitions, 1332 flow [2022-07-19 21:18:48,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:48,629 INFO L242 Difference]: Finished difference. Result has 455 places, 402 transitions, 1083 flow [2022-07-19 21:18:48,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1083, PETRI_PLACES=455, PETRI_TRANSITIONS=402} [2022-07-19 21:18:48,629 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 40 predicate places. [2022-07-19 21:18:48,630 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 402 transitions, 1083 flow [2022-07-19 21:18:48,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 371.79411764705884) internal successors, (12641), 34 states have internal predecessors, (12641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:48,631 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:48,631 INFO L200 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:48,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:48,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-19 21:18:48,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash -981893652, now seen corresponding path program 1 times [2022-07-19 21:18:48,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:48,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797500542] [2022-07-19 21:18:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:48,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:48,885 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:48,924 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:48,924 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:48,924 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:48,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:48,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-19 21:18:48,925 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:18:48,925 WARN L231 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:48,925 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-07-19 21:18:48,951 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:48,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 444 places, 499 transitions, 1219 flow [2022-07-19 21:18:49,108 INFO L129 PetriNetUnfolder]: 134/962 cut-off events. [2022-07-19 21:18:49,108 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-19 21:18:49,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 962 events. 134/962 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3437 event pairs, 0 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 982. Up to 28 conditions per place. [2022-07-19 21:18:49,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 444 places, 499 transitions, 1219 flow [2022-07-19 21:18:49,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 499 transitions, 1219 flow [2022-07-19 21:18:49,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:49,152 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:49,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:49,155 INFO L129 PetriNetUnfolder]: 2/73 cut-off events. [2022-07-19 21:18:49,155 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:49,155 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:49,155 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] [2022-07-19 21:18:49,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash 240347298, now seen corresponding path program 1 times [2022-07-19 21:18:49,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:49,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19835702] [2022-07-19 21:18:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:49,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:49,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:49,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19835702] [2022-07-19 21:18:49,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19835702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:49,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:49,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:49,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448825175] [2022-07-19 21:18:49,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:49,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:49,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:49,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:49,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:49,171 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 499 [2022-07-19 21:18:49,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 499 transitions, 1219 flow. Second operand has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:49,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 499 [2022-07-19 21:18:49,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:49,397 INFO L129 PetriNetUnfolder]: 0/792 cut-off events. [2022-07-19 21:18:49,397 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-19 21:18:49,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 792 events. 0/792 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3047 event pairs, 0 based on Foata normal form. 2819/3585 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-07-19 21:18:49,399 INFO L132 encePairwiseOnDemand]: 414/499 looper letters, 22 selfloop transitions, 2 changer transitions 11/420 dead transitions. [2022-07-19 21:18:49,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 420 transitions, 1109 flow [2022-07-19 21:18:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1302 transitions. [2022-07-19 21:18:49,401 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8697394789579158 [2022-07-19 21:18:49,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1302 transitions. [2022-07-19 21:18:49,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1302 transitions. [2022-07-19 21:18:49,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:49,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1302 transitions. [2022-07-19 21:18:49,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 434.0) internal successors, (1302), 3 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,404 INFO L186 Difference]: Start difference. First operand has 444 places, 499 transitions, 1219 flow. Second operand 3 states and 1302 transitions. [2022-07-19 21:18:49,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 420 transitions, 1109 flow [2022-07-19 21:18:49,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 420 transitions, 953 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:49,409 INFO L242 Difference]: Finished difference. Result has 446 places, 406 transitions, 887 flow [2022-07-19 21:18:49,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=887, PETRI_PLACES=446, PETRI_TRANSITIONS=406} [2022-07-19 21:18:49,411 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 2 predicate places. [2022-07-19 21:18:49,411 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 406 transitions, 887 flow [2022-07-19 21:18:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,411 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:49,411 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:49,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-19 21:18:49,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash 443938262, now seen corresponding path program 1 times [2022-07-19 21:18:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:49,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94995432] [2022-07-19 21:18:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:49,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:49,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:49,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94995432] [2022-07-19 21:18:49,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94995432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:49,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099267873] [2022-07-19 21:18:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:49,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:49,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:49,434 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:49,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 21:18:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:49,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:49,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099267873] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:49,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:49,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:49,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529637550] [2022-07-19 21:18:49,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:49,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:49,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:49,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:49,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:49,655 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-07-19 21:18:49,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 406 transitions, 887 flow. Second operand has 10 states, 10 states have (on average 397.3) internal successors, (3973), 10 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:49,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-07-19 21:18:49,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:49,866 INFO L129 PetriNetUnfolder]: 0/627 cut-off events. [2022-07-19 21:18:49,866 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-19 21:18:49,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 627 events. 0/627 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1953 event pairs, 0 based on Foata normal form. 2/629 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-19 21:18:49,868 INFO L132 encePairwiseOnDemand]: 493/499 looper letters, 23 selfloop transitions, 9 changer transitions 0/416 dead transitions. [2022-07-19 21:18:49,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 416 transitions, 973 flow [2022-07-19 21:18:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3589 transitions. [2022-07-19 21:18:49,870 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7991538632821198 [2022-07-19 21:18:49,870 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3589 transitions. [2022-07-19 21:18:49,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3589 transitions. [2022-07-19 21:18:49,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:49,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3589 transitions. [2022-07-19 21:18:49,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 398.77777777777777) internal successors, (3589), 9 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,875 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,875 INFO L186 Difference]: Start difference. First operand has 446 places, 406 transitions, 887 flow. Second operand 9 states and 3589 transitions. [2022-07-19 21:18:49,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 416 transitions, 973 flow [2022-07-19 21:18:49,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 416 transitions, 971 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:49,882 INFO L242 Difference]: Finished difference. Result has 445 places, 412 transitions, 935 flow [2022-07-19 21:18:49,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=935, PETRI_PLACES=445, PETRI_TRANSITIONS=412} [2022-07-19 21:18:49,883 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 1 predicate places. [2022-07-19 21:18:49,883 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 412 transitions, 935 flow [2022-07-19 21:18:49,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 397.3) internal successors, (3973), 10 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:49,883 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:49,883 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] [2022-07-19 21:18:49,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:50,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-19 21:18:50,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:50,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:50,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1762740737, now seen corresponding path program 1 times [2022-07-19 21:18:50,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:50,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654757685] [2022-07-19 21:18:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:50,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:50,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:50,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654757685] [2022-07-19 21:18:50,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654757685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:50,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715126230] [2022-07-19 21:18:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:50,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:50,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:50,175 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:50,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 21:18:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:50,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:50,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:50,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:50,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715126230] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:50,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:50,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:50,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108109826] [2022-07-19 21:18:50,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:50,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:50,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:50,489 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-07-19 21:18:50,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 412 transitions, 935 flow. Second operand has 18 states, 18 states have (on average 397.6111111111111) internal successors, (7157), 18 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:50,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:50,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-07-19 21:18:50,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:50,777 INFO L129 PetriNetUnfolder]: 0/583 cut-off events. [2022-07-19 21:18:50,778 INFO L130 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-07-19 21:18:50,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 583 events. 0/583 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1654 event pairs, 0 based on Foata normal form. 4/587 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-19 21:18:50,797 INFO L132 encePairwiseOnDemand]: 493/499 looper letters, 31 selfloop transitions, 21 changer transitions 0/436 dead transitions. [2022-07-19 21:18:50,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 436 transitions, 1147 flow [2022-07-19 21:18:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8351 transitions. [2022-07-19 21:18:50,802 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969271877087508 [2022-07-19 21:18:50,815 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8351 transitions. [2022-07-19 21:18:50,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8351 transitions. [2022-07-19 21:18:50,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:50,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8351 transitions. [2022-07-19 21:18:50,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 397.6666666666667) internal successors, (8351), 21 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:50,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 499.0) internal successors, (10978), 22 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:50,826 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 499.0) internal successors, (10978), 22 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:50,826 INFO L186 Difference]: Start difference. First operand has 445 places, 412 transitions, 935 flow. Second operand 21 states and 8351 transitions. [2022-07-19 21:18:50,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 436 transitions, 1147 flow [2022-07-19 21:18:50,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 436 transitions, 1133 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:50,847 INFO L242 Difference]: Finished difference. Result has 469 places, 425 transitions, 1059 flow [2022-07-19 21:18:50,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1059, PETRI_PLACES=469, PETRI_TRANSITIONS=425} [2022-07-19 21:18:50,848 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 25 predicate places. [2022-07-19 21:18:50,848 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 425 transitions, 1059 flow [2022-07-19 21:18:50,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 397.6111111111111) internal successors, (7157), 18 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:50,849 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:50,849 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] [2022-07-19 21:18:50,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-19 21:18:51,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-19 21:18:51,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1765414499, now seen corresponding path program 1 times [2022-07-19 21:18:51,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:51,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340246645] [2022-07-19 21:18:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:51,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:51,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340246645] [2022-07-19 21:18:51,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340246645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892318173] [2022-07-19 21:18:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:51,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:51,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:51,201 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:51,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 21:18:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:51,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:51,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892318173] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:51,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:51,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:51,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429354297] [2022-07-19 21:18:51,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:51,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:51,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:51,705 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-07-19 21:18:51,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 425 transitions, 1059 flow. Second operand has 34 states, 34 states have (on average 397.79411764705884) internal successors, (13525), 34 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:51,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:51,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-07-19 21:18:51,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:52,237 INFO L129 PetriNetUnfolder]: 0/506 cut-off events. [2022-07-19 21:18:52,237 INFO L130 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-07-19 21:18:52,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 506 events. 0/506 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-19 21:18:52,238 INFO L132 encePairwiseOnDemand]: 494/499 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-07-19 21:18:52,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 456 transitions, 1437 flow [2022-07-19 21:18:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-19 21:18:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-19 21:18:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16679 transitions. [2022-07-19 21:18:52,280 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7958297547475904 [2022-07-19 21:18:52,280 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16679 transitions. [2022-07-19 21:18:52,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16679 transitions. [2022-07-19 21:18:52,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:52,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16679 transitions. [2022-07-19 21:18:52,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 397.1190476190476) internal successors, (16679), 42 states have internal predecessors, (16679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 499.0) internal successors, (21457), 43 states have internal predecessors, (21457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,306 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 499.0) internal successors, (21457), 43 states have internal predecessors, (21457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,306 INFO L186 Difference]: Start difference. First operand has 469 places, 425 transitions, 1059 flow. Second operand 42 states and 16679 transitions. [2022-07-19 21:18:52,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 456 transitions, 1437 flow [2022-07-19 21:18:52,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:52,313 INFO L242 Difference]: Finished difference. Result has 486 places, 432 transitions, 1166 flow [2022-07-19 21:18:52,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1166, PETRI_PLACES=486, PETRI_TRANSITIONS=432} [2022-07-19 21:18:52,315 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 42 predicate places. [2022-07-19 21:18:52,315 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 432 transitions, 1166 flow [2022-07-19 21:18:52,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 397.79411764705884) internal successors, (13525), 34 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,317 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:52,317 INFO L200 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:52,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-19 21:18:52,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:52,525 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:52,526 INFO L85 PathProgramCache]: Analyzing trace with hash -639908372, now seen corresponding path program 1 times [2022-07-19 21:18:52,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:52,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720315759] [2022-07-19 21:18:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:52,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:52,548 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:52,579 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:52,579 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:52,579 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:52,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:52,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-19 21:18:52,580 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:52,580 WARN L231 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:52,580 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-07-19 21:18:52,605 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:52,608 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 473 places, 532 transitions, 1316 flow [2022-07-19 21:18:52,790 INFO L129 PetriNetUnfolder]: 144/1031 cut-off events. [2022-07-19 21:18:52,790 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-19 21:18:52,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 1031 events. 144/1031 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3703 event pairs, 0 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 1065. Up to 30 conditions per place. [2022-07-19 21:18:52,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 473 places, 532 transitions, 1316 flow [2022-07-19 21:18:52,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 473 places, 532 transitions, 1316 flow [2022-07-19 21:18:52,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:52,847 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:52,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:52,850 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-19 21:18:52,850 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:52,851 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:52,851 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] [2022-07-19 21:18:52,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:52,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:52,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1576976290, now seen corresponding path program 1 times [2022-07-19 21:18:52,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:52,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115957987] [2022-07-19 21:18:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:52,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:52,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:52,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115957987] [2022-07-19 21:18:52,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115957987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:52,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:52,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:52,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061288819] [2022-07-19 21:18:52,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:52,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:52,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:52,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:52,868 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 532 [2022-07-19 21:18:52,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 532 transitions, 1316 flow. Second operand has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:52,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:52,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 532 [2022-07-19 21:18:52,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:53,087 INFO L129 PetriNetUnfolder]: 0/850 cut-off events. [2022-07-19 21:18:53,088 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-19 21:18:53,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 850 events. 0/850 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3300 event pairs, 0 based on Foata normal form. 3286/4108 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2022-07-19 21:18:53,089 INFO L132 encePairwiseOnDemand]: 441/532 looper letters, 23 selfloop transitions, 2 changer transitions 11/447 dead transitions. [2022-07-19 21:18:53,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 447 transitions, 1196 flow [2022-07-19 21:18:53,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1387 transitions. [2022-07-19 21:18:53,091 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8690476190476191 [2022-07-19 21:18:53,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1387 transitions. [2022-07-19 21:18:53,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1387 transitions. [2022-07-19 21:18:53,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:53,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1387 transitions. [2022-07-19 21:18:53,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 462.3333333333333) internal successors, (1387), 3 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,093 INFO L186 Difference]: Start difference. First operand has 473 places, 532 transitions, 1316 flow. Second operand 3 states and 1387 transitions. [2022-07-19 21:18:53,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 447 transitions, 1196 flow [2022-07-19 21:18:53,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 447 transitions, 1014 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:53,099 INFO L242 Difference]: Finished difference. Result has 475 places, 433 transitions, 946 flow [2022-07-19 21:18:53,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=946, PETRI_PLACES=475, PETRI_TRANSITIONS=433} [2022-07-19 21:18:53,100 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 2 predicate places. [2022-07-19 21:18:53,100 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 433 transitions, 946 flow [2022-07-19 21:18:53,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,101 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:53,101 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] [2022-07-19 21:18:53,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-19 21:18:53,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:53,102 INFO L85 PathProgramCache]: Analyzing trace with hash 497768822, now seen corresponding path program 1 times [2022-07-19 21:18:53,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:53,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360151627] [2022-07-19 21:18:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:53,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360151627] [2022-07-19 21:18:53,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360151627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698379553] [2022-07-19 21:18:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:53,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:53,123 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:53,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 21:18:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:53,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:53,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698379553] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:53,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:53,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:53,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935195224] [2022-07-19 21:18:53,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:53,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:53,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:53,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:53,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:53,361 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-07-19 21:18:53,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 433 transitions, 946 flow. Second operand has 10 states, 10 states have (on average 423.3) internal successors, (4233), 10 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:53,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-07-19 21:18:53,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:53,565 INFO L129 PetriNetUnfolder]: 0/674 cut-off events. [2022-07-19 21:18:53,566 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:18:53,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 674 events. 0/674 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2112 event pairs, 0 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-19 21:18:53,567 INFO L132 encePairwiseOnDemand]: 526/532 looper letters, 24 selfloop transitions, 9 changer transitions 0/443 dead transitions. [2022-07-19 21:18:53,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 443 transitions, 1034 flow [2022-07-19 21:18:53,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3824 transitions. [2022-07-19 21:18:53,570 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7986633249791144 [2022-07-19 21:18:53,570 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3824 transitions. [2022-07-19 21:18:53,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3824 transitions. [2022-07-19 21:18:53,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:53,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3824 transitions. [2022-07-19 21:18:53,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 424.8888888888889) internal successors, (3824), 9 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 532.0) internal successors, (5320), 10 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,575 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 532.0) internal successors, (5320), 10 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,575 INFO L186 Difference]: Start difference. First operand has 475 places, 433 transitions, 946 flow. Second operand 9 states and 3824 transitions. [2022-07-19 21:18:53,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 443 transitions, 1034 flow [2022-07-19 21:18:53,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 443 transitions, 1032 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:53,583 INFO L242 Difference]: Finished difference. Result has 474 places, 439 transitions, 994 flow [2022-07-19 21:18:53,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=994, PETRI_PLACES=474, PETRI_TRANSITIONS=439} [2022-07-19 21:18:53,584 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 1 predicate places. [2022-07-19 21:18:53,584 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 439 transitions, 994 flow [2022-07-19 21:18:53,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 423.3) internal successors, (4233), 10 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:53,584 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:53,585 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] [2022-07-19 21:18:53,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:53,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:53,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:53,801 INFO L85 PathProgramCache]: Analyzing trace with hash 407301857, now seen corresponding path program 1 times [2022-07-19 21:18:53,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:53,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552052130] [2022-07-19 21:18:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:53,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:53,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552052130] [2022-07-19 21:18:53,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552052130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:53,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968885490] [2022-07-19 21:18:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:53,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:53,852 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:53,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 21:18:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:54,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:54,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:54,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968885490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:54,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:54,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:54,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388074219] [2022-07-19 21:18:54,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:54,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:54,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:54,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:54,177 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-07-19 21:18:54,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 439 transitions, 994 flow. Second operand has 18 states, 18 states have (on average 423.6111111111111) internal successors, (7625), 18 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:54,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:54,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-07-19 21:18:54,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:54,533 INFO L129 PetriNetUnfolder]: 0/630 cut-off events. [2022-07-19 21:18:54,534 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-07-19 21:18:54,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 630 events. 0/630 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1824 event pairs, 0 based on Foata normal form. 4/634 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-19 21:18:54,535 INFO L132 encePairwiseOnDemand]: 526/532 looper letters, 32 selfloop transitions, 21 changer transitions 0/463 dead transitions. [2022-07-19 21:18:54,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 463 transitions, 1208 flow [2022-07-19 21:18:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8898 transitions. [2022-07-19 21:18:54,542 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7964554242749732 [2022-07-19 21:18:54,542 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8898 transitions. [2022-07-19 21:18:54,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8898 transitions. [2022-07-19 21:18:54,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:54,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8898 transitions. [2022-07-19 21:18:54,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 423.7142857142857) internal successors, (8898), 21 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:54,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 532.0) internal successors, (11704), 22 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:54,555 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 532.0) internal successors, (11704), 22 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:54,555 INFO L186 Difference]: Start difference. First operand has 474 places, 439 transitions, 994 flow. Second operand 21 states and 8898 transitions. [2022-07-19 21:18:54,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 463 transitions, 1208 flow [2022-07-19 21:18:54,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 463 transitions, 1194 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:54,563 INFO L242 Difference]: Finished difference. Result has 498 places, 452 transitions, 1118 flow [2022-07-19 21:18:54,564 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1118, PETRI_PLACES=498, PETRI_TRANSITIONS=452} [2022-07-19 21:18:54,564 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 25 predicate places. [2022-07-19 21:18:54,564 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 452 transitions, 1118 flow [2022-07-19 21:18:54,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 423.6111111111111) internal successors, (7625), 18 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:54,565 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:54,565 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] [2022-07-19 21:18:54,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:54,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-07-19 21:18:54,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:54,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1073274307, now seen corresponding path program 1 times [2022-07-19 21:18:54,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:54,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124368312] [2022-07-19 21:18:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:54,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:54,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:54,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124368312] [2022-07-19 21:18:54,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124368312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:54,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747662802] [2022-07-19 21:18:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:54,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:54,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:54,901 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:54,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-19 21:18:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:55,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:55,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:55,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:55,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747662802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:55,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:55,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:55,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068195763] [2022-07-19 21:18:55,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:55,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:55,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:55,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:55,450 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-07-19 21:18:55,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 452 transitions, 1118 flow. Second operand has 34 states, 34 states have (on average 423.79411764705884) internal successors, (14409), 34 states have internal predecessors, (14409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:55,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:55,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-07-19 21:18:55,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:55,967 INFO L129 PetriNetUnfolder]: 0/542 cut-off events. [2022-07-19 21:18:55,967 INFO L130 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-07-19 21:18:55,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 542 events. 0/542 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1267 event pairs, 0 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-07-19 21:18:55,968 INFO L132 encePairwiseOnDemand]: 527/532 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-07-19 21:18:55,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 488 transitions, 1542 flow [2022-07-19 21:18:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:18:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:18:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19041 transitions. [2022-07-19 21:18:55,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953634085213033 [2022-07-19 21:18:55,981 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19041 transitions. [2022-07-19 21:18:55,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19041 transitions. [2022-07-19 21:18:55,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:55,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19041 transitions. [2022-07-19 21:18:55,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 423.1333333333333) internal successors, (19041), 45 states have internal predecessors, (19041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 532.0) internal successors, (24472), 46 states have internal predecessors, (24472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,057 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 532.0) internal successors, (24472), 46 states have internal predecessors, (24472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,057 INFO L186 Difference]: Start difference. First operand has 498 places, 452 transitions, 1118 flow. Second operand 45 states and 19041 transitions. [2022-07-19 21:18:56,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 488 transitions, 1542 flow [2022-07-19 21:18:56,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-07-19 21:18:56,064 INFO L242 Difference]: Finished difference. Result has 518 places, 462 transitions, 1249 flow [2022-07-19 21:18:56,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1249, PETRI_PLACES=518, PETRI_TRANSITIONS=462} [2022-07-19 21:18:56,065 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 45 predicate places. [2022-07-19 21:18:56,065 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 462 transitions, 1249 flow [2022-07-19 21:18:56,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 423.79411764705884) internal successors, (14409), 34 states have internal predecessors, (14409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,067 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:56,067 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:56,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:56,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:56,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:56,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1626722253, now seen corresponding path program 1 times [2022-07-19 21:18:56,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:56,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077942318] [2022-07-19 21:18:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:56,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:56,320 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:56,359 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:56,360 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:56,360 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:56,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:56,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-07-19 21:18:56,360 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:56,362 WARN L231 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:56,362 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-07-19 21:18:56,396 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:18:56,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 502 places, 565 transitions, 1415 flow [2022-07-19 21:18:56,615 INFO L129 PetriNetUnfolder]: 154/1100 cut-off events. [2022-07-19 21:18:56,616 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-19 21:18:56,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 1100 events. 154/1100 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3981 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 1151. Up to 32 conditions per place. [2022-07-19 21:18:56,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 502 places, 565 transitions, 1415 flow [2022-07-19 21:18:56,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 502 places, 565 transitions, 1415 flow [2022-07-19 21:18:56,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:56,676 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:18:56,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:56,679 INFO L129 PetriNetUnfolder]: 5/81 cut-off events. [2022-07-19 21:18:56,679 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:56,679 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:56,679 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] [2022-07-19 21:18:56,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1042790754, now seen corresponding path program 1 times [2022-07-19 21:18:56,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:56,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805955417] [2022-07-19 21:18:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:56,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:56,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:56,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805955417] [2022-07-19 21:18:56,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805955417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:56,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:56,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:56,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939788929] [2022-07-19 21:18:56,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:56,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:56,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:56,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:56,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:56,696 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 565 [2022-07-19 21:18:56,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 565 transitions, 1415 flow. Second operand has 3 states, 3 states have (on average 449.0) internal successors, (1347), 3 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) [2022-07-19 21:18:56,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:56,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 565 [2022-07-19 21:18:56,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:56,954 INFO L129 PetriNetUnfolder]: 0/908 cut-off events. [2022-07-19 21:18:56,954 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-19 21:18:56,955 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1169 conditions, 908 events. 0/908 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3565 event pairs, 0 based on Foata normal form. 3790/4668 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2022-07-19 21:18:56,956 INFO L132 encePairwiseOnDemand]: 468/565 looper letters, 24 selfloop transitions, 2 changer transitions 11/474 dead transitions. [2022-07-19 21:18:56,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 474 transitions, 1285 flow [2022-07-19 21:18:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1472 transitions. [2022-07-19 21:18:56,957 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8684365781710914 [2022-07-19 21:18:56,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1472 transitions. [2022-07-19 21:18:56,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1472 transitions. [2022-07-19 21:18:56,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:56,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1472 transitions. [2022-07-19 21:18:56,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 490.6666666666667) internal successors, (1472), 3 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:56,960 INFO L186 Difference]: Start difference. First operand has 502 places, 565 transitions, 1415 flow. Second operand 3 states and 1472 transitions. [2022-07-19 21:18:56,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 474 transitions, 1285 flow [2022-07-19 21:18:56,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 474 transitions, 1075 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:56,966 INFO L242 Difference]: Finished difference. Result has 504 places, 460 transitions, 1005 flow [2022-07-19 21:18:56,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1005, PETRI_PLACES=504, PETRI_TRANSITIONS=460} [2022-07-19 21:18:56,967 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 2 predicate places. [2022-07-19 21:18:56,967 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 460 transitions, 1005 flow [2022-07-19 21:18:56,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 449.0) internal successors, (1347), 3 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) [2022-07-19 21:18:56,967 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:56,967 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] [2022-07-19 21:18:56,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-07-19 21:18:56,967 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:56,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1743828086, now seen corresponding path program 1 times [2022-07-19 21:18:56,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:56,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604385089] [2022-07-19 21:18:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:56,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:56,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:56,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604385089] [2022-07-19 21:18:56,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604385089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:56,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003149662] [2022-07-19 21:18:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:56,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:56,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:56,987 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:56,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-19 21:18:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:57,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:57,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:57,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:57,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003149662] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:57,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:57,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:57,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625920794] [2022-07-19 21:18:57,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:57,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:57,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:57,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:57,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:57,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-07-19 21:18:57,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 460 transitions, 1005 flow. Second operand has 10 states, 10 states have (on average 449.3) internal successors, (4493), 10 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:57,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:57,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-07-19 21:18:57,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:57,509 INFO L129 PetriNetUnfolder]: 0/721 cut-off events. [2022-07-19 21:18:57,509 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-19 21:18:57,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 721 events. 0/721 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2282 event pairs, 0 based on Foata normal form. 2/723 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-19 21:18:57,511 INFO L132 encePairwiseOnDemand]: 559/565 looper letters, 25 selfloop transitions, 9 changer transitions 0/470 dead transitions. [2022-07-19 21:18:57,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 470 transitions, 1095 flow [2022-07-19 21:18:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4059 transitions. [2022-07-19 21:18:57,513 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7982300884955752 [2022-07-19 21:18:57,513 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4059 transitions. [2022-07-19 21:18:57,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4059 transitions. [2022-07-19 21:18:57,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:57,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4059 transitions. [2022-07-19 21:18:57,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 451.0) internal successors, (4059), 9 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:57,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 565.0) internal successors, (5650), 10 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:57,519 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 565.0) internal successors, (5650), 10 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:57,519 INFO L186 Difference]: Start difference. First operand has 504 places, 460 transitions, 1005 flow. Second operand 9 states and 4059 transitions. [2022-07-19 21:18:57,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 470 transitions, 1095 flow [2022-07-19 21:18:57,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 470 transitions, 1093 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:57,525 INFO L242 Difference]: Finished difference. Result has 503 places, 466 transitions, 1053 flow [2022-07-19 21:18:57,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1053, PETRI_PLACES=503, PETRI_TRANSITIONS=466} [2022-07-19 21:18:57,526 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 1 predicate places. [2022-07-19 21:18:57,526 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 466 transitions, 1053 flow [2022-07-19 21:18:57,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 449.3) internal successors, (4493), 10 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:57,527 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:57,527 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] [2022-07-19 21:18:57,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-19 21:18:57,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:57,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash 435117153, now seen corresponding path program 1 times [2022-07-19 21:18:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:57,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475903040] [2022-07-19 21:18:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:57,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:57,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:57,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475903040] [2022-07-19 21:18:57,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475903040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:57,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514659433] [2022-07-19 21:18:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:57,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:57,798 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:57,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-19 21:18:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:58,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:18:58,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:58,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:58,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514659433] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:58,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:58,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:18:58,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797962374] [2022-07-19 21:18:58,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:58,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:18:58,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:58,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:18:58,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:18:58,096 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-07-19 21:18:58,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 466 transitions, 1053 flow. Second operand has 18 states, 18 states have (on average 449.6111111111111) internal successors, (8093), 18 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:58,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:58,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-07-19 21:18:58,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:58,420 INFO L129 PetriNetUnfolder]: 0/677 cut-off events. [2022-07-19 21:18:58,421 INFO L130 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-07-19 21:18:58,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 677 events. 0/677 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2001 event pairs, 0 based on Foata normal form. 4/681 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-19 21:18:58,422 INFO L132 encePairwiseOnDemand]: 559/565 looper letters, 33 selfloop transitions, 21 changer transitions 0/490 dead transitions. [2022-07-19 21:18:58,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 490 transitions, 1269 flow [2022-07-19 21:18:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:18:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:18:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9445 transitions. [2022-07-19 21:18:58,427 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7960387694900969 [2022-07-19 21:18:58,427 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9445 transitions. [2022-07-19 21:18:58,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9445 transitions. [2022-07-19 21:18:58,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:58,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9445 transitions. [2022-07-19 21:18:58,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 449.76190476190476) internal successors, (9445), 21 states have internal predecessors, (9445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:58,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 565.0) internal successors, (12430), 22 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:58,442 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 565.0) internal successors, (12430), 22 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:58,442 INFO L186 Difference]: Start difference. First operand has 503 places, 466 transitions, 1053 flow. Second operand 21 states and 9445 transitions. [2022-07-19 21:18:58,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 490 transitions, 1269 flow [2022-07-19 21:18:58,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 490 transitions, 1255 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:58,449 INFO L242 Difference]: Finished difference. Result has 527 places, 479 transitions, 1177 flow [2022-07-19 21:18:58,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1177, PETRI_PLACES=527, PETRI_TRANSITIONS=479} [2022-07-19 21:18:58,450 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 25 predicate places. [2022-07-19 21:18:58,450 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 479 transitions, 1177 flow [2022-07-19 21:18:58,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 449.6111111111111) internal successors, (8093), 18 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:58,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:58,451 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:58,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:58,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-19 21:18:58,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:58,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1656795203, now seen corresponding path program 1 times [2022-07-19 21:18:58,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:58,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959916013] [2022-07-19 21:18:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:58,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:58,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959916013] [2022-07-19 21:18:58,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959916013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766067992] [2022-07-19 21:18:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:58,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:58,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:58,777 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:58,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-19 21:18:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:18:59,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:59,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:59,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766067992] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:59,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:59,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:18:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56874127] [2022-07-19 21:18:59,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:59,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:18:59,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:18:59,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:18:59,250 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-07-19 21:18:59,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 479 transitions, 1177 flow. Second operand has 34 states, 34 states have (on average 449.79411764705884) internal successors, (15293), 34 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:59,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-07-19 21:18:59,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:59,816 INFO L129 PetriNetUnfolder]: 0/589 cut-off events. [2022-07-19 21:18:59,817 INFO L130 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-07-19 21:18:59,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 589 events. 0/589 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1419 event pairs, 0 based on Foata normal form. 8/597 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-19 21:18:59,818 INFO L132 encePairwiseOnDemand]: 559/565 looper letters, 49 selfloop transitions, 45 changer transitions 0/530 dead transitions. [2022-07-19 21:18:59,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 530 transitions, 1681 flow [2022-07-19 21:18:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:18:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:18:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20217 transitions. [2022-07-19 21:18:59,827 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951622418879056 [2022-07-19 21:18:59,828 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20217 transitions. [2022-07-19 21:18:59,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20217 transitions. [2022-07-19 21:18:59,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:59,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20217 transitions. [2022-07-19 21:18:59,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 449.26666666666665) internal successors, (20217), 45 states have internal predecessors, (20217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 565.0) internal successors, (25990), 46 states have internal predecessors, (25990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,857 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 565.0) internal successors, (25990), 46 states have internal predecessors, (25990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,858 INFO L186 Difference]: Start difference. First operand has 527 places, 479 transitions, 1177 flow. Second operand 45 states and 20217 transitions. [2022-07-19 21:18:59,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 530 transitions, 1681 flow [2022-07-19 21:18:59,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 530 transitions, 1641 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:18:59,865 INFO L242 Difference]: Finished difference. Result has 574 places, 504 transitions, 1455 flow [2022-07-19 21:18:59,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1455, PETRI_PLACES=574, PETRI_TRANSITIONS=504} [2022-07-19 21:18:59,866 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 72 predicate places. [2022-07-19 21:18:59,866 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 504 transitions, 1455 flow [2022-07-19 21:18:59,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 449.79411764705884) internal successors, (15293), 34 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:59,868 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:59,868 INFO L200 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:59,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-19 21:19:00,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-19 21:19:00,086 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:00,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:00,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1018229807, now seen corresponding path program 1 times [2022-07-19 21:19:00,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:00,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732639206] [2022-07-19 21:19:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:00,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:00,131 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:00,168 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:00,169 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:00,169 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:00,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:00,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-07-19 21:19:00,169 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:19:00,170 WARN L231 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:00,170 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-07-19 21:19:00,202 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:00,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 531 places, 598 transitions, 1516 flow [2022-07-19 21:19:00,467 INFO L129 PetriNetUnfolder]: 164/1169 cut-off events. [2022-07-19 21:19:00,467 INFO L130 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-07-19 21:19:00,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1354 conditions, 1169 events. 164/1169 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4209 event pairs, 0 based on Foata normal form. 0/971 useless extension candidates. Maximal degree in co-relation 1238. Up to 34 conditions per place. [2022-07-19 21:19:00,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 531 places, 598 transitions, 1516 flow [2022-07-19 21:19:00,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 531 places, 598 transitions, 1516 flow [2022-07-19 21:19:00,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:00,534 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:19:00,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:00,537 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2022-07-19 21:19:00,537 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:00,537 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:00,537 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:00,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash 434742049, now seen corresponding path program 1 times [2022-07-19 21:19:00,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:00,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111382322] [2022-07-19 21:19:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:00,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:00,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:00,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111382322] [2022-07-19 21:19:00,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111382322] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:00,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:00,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:19:00,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654912082] [2022-07-19 21:19:00,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:00,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:19:00,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:00,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:19:00,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:19:00,550 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 598 [2022-07-19 21:19:00,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 598 transitions, 1516 flow. Second operand has 2 states, 2 states have (on average 481.5) internal successors, (963), 2 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) [2022-07-19 21:19:00,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:00,551 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 598 [2022-07-19 21:19:00,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:00,801 INFO L129 PetriNetUnfolder]: 0/988 cut-off events. [2022-07-19 21:19:00,801 INFO L130 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2022-07-19 21:19:00,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 988 events. 0/988 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3881 event pairs, 0 based on Foata normal form. 796/1750 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-19 21:19:00,803 INFO L132 encePairwiseOnDemand]: 498/598 looper letters, 16 selfloop transitions, 0 changer transitions 11/497 dead transitions. [2022-07-19 21:19:00,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1346 flow [2022-07-19 21:19:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:19:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:19:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1078 transitions. [2022-07-19 21:19:00,805 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9013377926421404 [2022-07-19 21:19:00,805 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1078 transitions. [2022-07-19 21:19:00,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1078 transitions. [2022-07-19 21:19:00,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:00,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1078 transitions. [2022-07-19 21:19:00,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 539.0) internal successors, (1078), 2 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:00,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:00,807 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:00,807 INFO L186 Difference]: Start difference. First operand has 531 places, 598 transitions, 1516 flow. Second operand 2 states and 1078 transitions. [2022-07-19 21:19:00,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1346 flow [2022-07-19 21:19:00,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 497 transitions, 1106 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:00,814 INFO L242 Difference]: Finished difference. Result has 531 places, 486 transitions, 1052 flow [2022-07-19 21:19:00,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1052, PETRI_PLACES=531, PETRI_TRANSITIONS=486} [2022-07-19 21:19:00,815 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 0 predicate places. [2022-07-19 21:19:00,816 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 486 transitions, 1052 flow [2022-07-19 21:19:00,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 481.5) internal successors, (963), 2 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) [2022-07-19 21:19:00,816 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:00,816 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] [2022-07-19 21:19:00,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-07-19 21:19:00,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:00,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1362209310, now seen corresponding path program 1 times [2022-07-19 21:19:00,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:00,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822441607] [2022-07-19 21:19:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:00,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:00,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:00,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822441607] [2022-07-19 21:19:00,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822441607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:00,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:00,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:00,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326709063] [2022-07-19 21:19:00,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:00,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:00,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:00,834 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 598 [2022-07-19 21:19:00,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 486 transitions, 1052 flow. Second operand has 3 states, 3 states have (on average 475.0) internal successors, (1425), 3 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:00,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:00,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 598 [2022-07-19 21:19:00,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:01,060 INFO L129 PetriNetUnfolder]: 0/790 cut-off events. [2022-07-19 21:19:01,060 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-19 21:19:01,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 790 events. 0/790 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2596 event pairs, 0 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2022-07-19 21:19:01,061 INFO L132 encePairwiseOnDemand]: 595/598 looper letters, 25 selfloop transitions, 2 changer transitions 0/490 dead transitions. [2022-07-19 21:19:01,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 490 transitions, 1114 flow [2022-07-19 21:19:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1450 transitions. [2022-07-19 21:19:01,063 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8082497212931996 [2022-07-19 21:19:01,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1450 transitions. [2022-07-19 21:19:01,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1450 transitions. [2022-07-19 21:19:01,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:01,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1450 transitions. [2022-07-19 21:19:01,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 483.3333333333333) internal successors, (1450), 3 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,065 INFO L186 Difference]: Start difference. First operand has 531 places, 486 transitions, 1052 flow. Second operand 3 states and 1450 transitions. [2022-07-19 21:19:01,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 490 transitions, 1114 flow [2022-07-19 21:19:01,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 490 transitions, 1114 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:01,071 INFO L242 Difference]: Finished difference. Result has 523 places, 487 transitions, 1064 flow [2022-07-19 21:19:01,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1064, PETRI_PLACES=523, PETRI_TRANSITIONS=487} [2022-07-19 21:19:01,071 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, -8 predicate places. [2022-07-19 21:19:01,072 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 487 transitions, 1064 flow [2022-07-19 21:19:01,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 475.0) internal successors, (1425), 3 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,072 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:01,072 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] [2022-07-19 21:19:01,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-07-19 21:19:01,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:01,073 INFO L85 PathProgramCache]: Analyzing trace with hash -112851242, now seen corresponding path program 1 times [2022-07-19 21:19:01,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:01,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611013280] [2022-07-19 21:19:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:01,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:01,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:01,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611013280] [2022-07-19 21:19:01,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611013280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:01,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935233208] [2022-07-19 21:19:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:01,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:01,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:01,094 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:01,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-19 21:19:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:01,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:01,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:01,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:01,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935233208] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:01,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:01,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:01,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314289121] [2022-07-19 21:19:01,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:01,373 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-19 21:19:01,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 487 transitions, 1064 flow. Second operand has 10 states, 10 states have (on average 475.3) internal successors, (4753), 10 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:01,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-19 21:19:01,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:01,631 INFO L129 PetriNetUnfolder]: 0/768 cut-off events. [2022-07-19 21:19:01,632 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-19 21:19:01,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 768 events. 0/768 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2464 event pairs, 0 based on Foata normal form. 2/770 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-19 21:19:01,633 INFO L132 encePairwiseOnDemand]: 592/598 looper letters, 26 selfloop transitions, 9 changer transitions 0/497 dead transitions. [2022-07-19 21:19:01,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1156 flow [2022-07-19 21:19:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4294 transitions. [2022-07-19 21:19:01,636 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7978446674098848 [2022-07-19 21:19:01,636 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4294 transitions. [2022-07-19 21:19:01,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4294 transitions. [2022-07-19 21:19:01,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:01,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4294 transitions. [2022-07-19 21:19:01,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 477.1111111111111) internal successors, (4294), 9 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 598.0) internal successors, (5980), 10 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,642 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 598.0) internal successors, (5980), 10 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,642 INFO L186 Difference]: Start difference. First operand has 523 places, 487 transitions, 1064 flow. Second operand 9 states and 4294 transitions. [2022-07-19 21:19:01,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1156 flow [2022-07-19 21:19:01,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 497 transitions, 1154 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:01,648 INFO L242 Difference]: Finished difference. Result has 533 places, 493 transitions, 1112 flow [2022-07-19 21:19:01,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1112, PETRI_PLACES=533, PETRI_TRANSITIONS=493} [2022-07-19 21:19:01,649 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 2 predicate places. [2022-07-19 21:19:01,649 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 493 transitions, 1112 flow [2022-07-19 21:19:01,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 475.3) internal successors, (4753), 10 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:01,649 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:01,649 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] [2022-07-19 21:19:01,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:01,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:01,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:01,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1846186625, now seen corresponding path program 1 times [2022-07-19 21:19:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:01,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590732991] [2022-07-19 21:19:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:01,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:01,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:01,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590732991] [2022-07-19 21:19:01,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590732991] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:01,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303680376] [2022-07-19 21:19:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:01,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:01,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:01,921 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:01,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-19 21:19:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:02,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:02,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:02,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:02,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303680376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:02,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:02,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:02,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401029296] [2022-07-19 21:19:02,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:02,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:02,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:02,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:02,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:02,258 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-19 21:19:02,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 493 transitions, 1112 flow. Second operand has 18 states, 18 states have (on average 475.6111111111111) internal successors, (8561), 18 states have internal predecessors, (8561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:02,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:02,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-19 21:19:02,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:02,654 INFO L129 PetriNetUnfolder]: 0/724 cut-off events. [2022-07-19 21:19:02,655 INFO L130 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-07-19 21:19:02,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 724 events. 0/724 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2164 event pairs, 0 based on Foata normal form. 4/728 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-19 21:19:02,656 INFO L132 encePairwiseOnDemand]: 592/598 looper letters, 34 selfloop transitions, 21 changer transitions 0/517 dead transitions. [2022-07-19 21:19:02,656 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 517 transitions, 1330 flow [2022-07-19 21:19:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9992 transitions. [2022-07-19 21:19:02,662 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956681000159261 [2022-07-19 21:19:02,662 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9992 transitions. [2022-07-19 21:19:02,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9992 transitions. [2022-07-19 21:19:02,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:02,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9992 transitions. [2022-07-19 21:19:02,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 475.8095238095238) internal successors, (9992), 21 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:02,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 598.0) internal successors, (13156), 22 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:02,676 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 598.0) internal successors, (13156), 22 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:02,677 INFO L186 Difference]: Start difference. First operand has 533 places, 493 transitions, 1112 flow. Second operand 21 states and 9992 transitions. [2022-07-19 21:19:02,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 517 transitions, 1330 flow [2022-07-19 21:19:02,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 517 transitions, 1316 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:02,683 INFO L242 Difference]: Finished difference. Result has 557 places, 506 transitions, 1236 flow [2022-07-19 21:19:02,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1236, PETRI_PLACES=557, PETRI_TRANSITIONS=506} [2022-07-19 21:19:02,684 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 26 predicate places. [2022-07-19 21:19:02,685 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 506 transitions, 1236 flow [2022-07-19 21:19:02,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 475.6111111111111) internal successors, (8561), 18 states have internal predecessors, (8561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:02,686 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:02,686 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] [2022-07-19 21:19:02,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:02,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:02,905 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash -778990109, now seen corresponding path program 1 times [2022-07-19 21:19:02,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:02,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173600020] [2022-07-19 21:19:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:03,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173600020] [2022-07-19 21:19:03,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173600020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049844840] [2022-07-19 21:19:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:03,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:03,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:03,032 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:03,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-19 21:19:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:03,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:03,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:03,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049844840] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:03,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:03,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:03,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085589459] [2022-07-19 21:19:03,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:03,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:03,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:03,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:03,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:03,609 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-19 21:19:03,614 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 506 transitions, 1236 flow. Second operand has 34 states, 34 states have (on average 475.79411764705884) internal successors, (16177), 34 states have internal predecessors, (16177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:03,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:03,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-19 21:19:03,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:04,221 INFO L129 PetriNetUnfolder]: 0/636 cut-off events. [2022-07-19 21:19:04,222 INFO L130 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-07-19 21:19:04,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 636 events. 0/636 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1587 event pairs, 0 based on Foata normal form. 8/644 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-07-19 21:19:04,223 INFO L132 encePairwiseOnDemand]: 592/598 looper letters, 50 selfloop transitions, 45 changer transitions 0/557 dead transitions. [2022-07-19 21:19:04,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 557 transitions, 1742 flow [2022-07-19 21:19:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21388 transitions. [2022-07-19 21:19:04,233 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7947974730583426 [2022-07-19 21:19:04,233 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21388 transitions. [2022-07-19 21:19:04,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21388 transitions. [2022-07-19 21:19:04,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:04,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21388 transitions. [2022-07-19 21:19:04,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 475.2888888888889) internal successors, (21388), 45 states have internal predecessors, (21388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 598.0) internal successors, (27508), 46 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,266 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 598.0) internal successors, (27508), 46 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,266 INFO L186 Difference]: Start difference. First operand has 557 places, 506 transitions, 1236 flow. Second operand 45 states and 21388 transitions. [2022-07-19 21:19:04,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 557 transitions, 1742 flow [2022-07-19 21:19:04,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 557 transitions, 1702 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:04,274 INFO L242 Difference]: Finished difference. Result has 604 places, 531 transitions, 1514 flow [2022-07-19 21:19:04,275 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1514, PETRI_PLACES=604, PETRI_TRANSITIONS=531} [2022-07-19 21:19:04,275 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 73 predicate places. [2022-07-19 21:19:04,275 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 531 transitions, 1514 flow [2022-07-19 21:19:04,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 475.79411764705884) internal successors, (16177), 34 states have internal predecessors, (16177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:04,277 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:04,277 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:04,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:04,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:04,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1064402135, now seen corresponding path program 1 times [2022-07-19 21:19:04,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:04,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320788324] [2022-07-19 21:19:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:04,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:04,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:04,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320788324] [2022-07-19 21:19:04,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320788324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:04,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899380071] [2022-07-19 21:19:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:04,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:04,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:04,819 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:04,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-19 21:19:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:05,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:05,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:06,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899380071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:06,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:06,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:06,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529268477] [2022-07-19 21:19:06,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:06,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:06,064 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-19 21:19:06,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 531 transitions, 1514 flow. Second operand has 66 states, 66 states have (on average 475.8939393939394) internal successors, (31409), 66 states have internal predecessors, (31409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:06,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:06,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-19 21:19:06,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:06,821 INFO L129 PetriNetUnfolder]: 0/614 cut-off events. [2022-07-19 21:19:06,822 INFO L130 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-07-19 21:19:06,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 614 events. 0/614 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1463 event pairs, 0 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-07-19 21:19:06,823 INFO L132 encePairwiseOnDemand]: 593/598 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-07-19 21:19:06,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 552 transitions, 1852 flow [2022-07-19 21:19:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-19 21:19:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-19 21:19:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24225 transitions. [2022-07-19 21:19:06,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.794314381270903 [2022-07-19 21:19:06,834 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24225 transitions. [2022-07-19 21:19:06,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24225 transitions. [2022-07-19 21:19:06,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:06,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24225 transitions. [2022-07-19 21:19:06,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 475.0) internal successors, (24225), 51 states have internal predecessors, (24225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:06,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 598.0) internal successors, (31096), 52 states have internal predecessors, (31096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:06,875 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 598.0) internal successors, (31096), 52 states have internal predecessors, (31096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:06,875 INFO L186 Difference]: Start difference. First operand has 604 places, 531 transitions, 1514 flow. Second operand 51 states and 24225 transitions. [2022-07-19 21:19:06,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 552 transitions, 1852 flow [2022-07-19 21:19:06,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:06,884 INFO L242 Difference]: Finished difference. Result has 610 places, 523 transitions, 1471 flow [2022-07-19 21:19:06,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1471, PETRI_PLACES=610, PETRI_TRANSITIONS=523} [2022-07-19 21:19:06,885 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 79 predicate places. [2022-07-19 21:19:06,885 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 523 transitions, 1471 flow [2022-07-19 21:19:06,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 475.8939393939394) internal successors, (31409), 66 states have internal predecessors, (31409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:06,888 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:06,888 INFO L200 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:06,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:07,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-07-19 21:19:07,103 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1486777266, now seen corresponding path program 1 times [2022-07-19 21:19:07,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:07,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933119587] [2022-07-19 21:19:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:07,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:07,126 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:07,157 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:07,157 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:07,158 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:07,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-07-19 21:19:07,158 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:07,158 WARN L231 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:07,158 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-07-19 21:19:07,190 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:07,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 560 places, 631 transitions, 1619 flow [2022-07-19 21:19:07,517 INFO L129 PetriNetUnfolder]: 174/1238 cut-off events. [2022-07-19 21:19:07,518 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-19 21:19:07,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 1238 events. 174/1238 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4492 event pairs, 0 based on Foata normal form. 0/1028 useless extension candidates. Maximal degree in co-relation 1326. Up to 36 conditions per place. [2022-07-19 21:19:07,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 560 places, 631 transitions, 1619 flow [2022-07-19 21:19:07,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 560 places, 631 transitions, 1619 flow [2022-07-19 21:19:07,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:07,589 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:19:07,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:07,592 INFO L129 PetriNetUnfolder]: 5/79 cut-off events. [2022-07-19 21:19:07,592 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:07,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:07,592 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:07,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1343056606, now seen corresponding path program 1 times [2022-07-19 21:19:07,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:07,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397320844] [2022-07-19 21:19:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:07,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:07,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:07,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397320844] [2022-07-19 21:19:07,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397320844] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:07,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:07,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:07,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859122174] [2022-07-19 21:19:07,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:07,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:07,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:07,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:07,609 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 631 [2022-07-19 21:19:07,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 631 transitions, 1619 flow. Second operand has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:07,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:07,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 631 [2022-07-19 21:19:07,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:07,932 INFO L129 PetriNetUnfolder]: 0/1024 cut-off events. [2022-07-19 21:19:07,932 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-19 21:19:07,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1024 events. 0/1024 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4045 event pairs, 0 based on Foata normal form. 4904/5894 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2022-07-19 21:19:07,934 INFO L132 encePairwiseOnDemand]: 522/631 looper letters, 26 selfloop transitions, 2 changer transitions 11/528 dead transitions. [2022-07-19 21:19:07,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 528 transitions, 1469 flow [2022-07-19 21:19:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1642 transitions. [2022-07-19 21:19:07,936 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8674062334918119 [2022-07-19 21:19:07,936 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1642 transitions. [2022-07-19 21:19:07,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1642 transitions. [2022-07-19 21:19:07,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:07,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1642 transitions. [2022-07-19 21:19:07,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 547.3333333333334) internal successors, (1642), 3 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:07,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:07,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:07,939 INFO L186 Difference]: Start difference. First operand has 560 places, 631 transitions, 1619 flow. Second operand 3 states and 1642 transitions. [2022-07-19 21:19:07,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 528 transitions, 1469 flow [2022-07-19 21:19:07,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 528 transitions, 1197 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:07,946 INFO L242 Difference]: Finished difference. Result has 562 places, 514 transitions, 1123 flow [2022-07-19 21:19:07,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1123, PETRI_PLACES=562, PETRI_TRANSITIONS=514} [2022-07-19 21:19:07,947 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 2 predicate places. [2022-07-19 21:19:07,947 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 514 transitions, 1123 flow [2022-07-19 21:19:07,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:07,948 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:07,948 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] [2022-07-19 21:19:07,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-07-19 21:19:07,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash -777301866, now seen corresponding path program 1 times [2022-07-19 21:19:07,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:07,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929408581] [2022-07-19 21:19:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:07,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:07,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:07,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929408581] [2022-07-19 21:19:07,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929408581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:07,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501922517] [2022-07-19 21:19:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:07,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:07,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:07,971 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:07,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-19 21:19:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:08,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:08,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:08,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:08,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501922517] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:08,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:08,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:08,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497488245] [2022-07-19 21:19:08,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:08,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:08,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:08,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:08,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:08,258 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-19 21:19:08,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 514 transitions, 1123 flow. Second operand has 10 states, 10 states have (on average 501.3) internal successors, (5013), 10 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:08,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:08,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-19 21:19:08,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:08,572 INFO L129 PetriNetUnfolder]: 0/815 cut-off events. [2022-07-19 21:19:08,572 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:19:08,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 815 events. 0/815 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2619 event pairs, 0 based on Foata normal form. 2/817 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-19 21:19:08,574 INFO L132 encePairwiseOnDemand]: 625/631 looper letters, 27 selfloop transitions, 9 changer transitions 0/524 dead transitions. [2022-07-19 21:19:08,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 524 transitions, 1217 flow [2022-07-19 21:19:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4529 transitions. [2022-07-19 21:19:08,576 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7974995597816517 [2022-07-19 21:19:08,576 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4529 transitions. [2022-07-19 21:19:08,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4529 transitions. [2022-07-19 21:19:08,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:08,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4529 transitions. [2022-07-19 21:19:08,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 503.22222222222223) internal successors, (4529), 9 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:08,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:08,582 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:08,582 INFO L186 Difference]: Start difference. First operand has 562 places, 514 transitions, 1123 flow. Second operand 9 states and 4529 transitions. [2022-07-19 21:19:08,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 524 transitions, 1217 flow [2022-07-19 21:19:08,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 524 transitions, 1215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:08,589 INFO L242 Difference]: Finished difference. Result has 561 places, 520 transitions, 1171 flow [2022-07-19 21:19:08,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1171, PETRI_PLACES=561, PETRI_TRANSITIONS=520} [2022-07-19 21:19:08,590 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 1 predicate places. [2022-07-19 21:19:08,590 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 520 transitions, 1171 flow [2022-07-19 21:19:08,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 501.3) internal successors, (5013), 10 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:08,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:08,591 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] [2022-07-19 21:19:08,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:08,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-07-19 21:19:08,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash 345542977, now seen corresponding path program 1 times [2022-07-19 21:19:08,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:08,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492964909] [2022-07-19 21:19:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:08,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:08,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:08,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492964909] [2022-07-19 21:19:08,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492964909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:08,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762414210] [2022-07-19 21:19:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:08,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:08,870 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:08,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-19 21:19:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:09,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:09,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:09,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:09,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762414210] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:09,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:09,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:09,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910994598] [2022-07-19 21:19:09,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:09,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:09,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:09,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:09,349 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-19 21:19:09,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 520 transitions, 1171 flow. Second operand has 18 states, 18 states have (on average 501.6111111111111) internal successors, (9029), 18 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:09,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:09,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-19 21:19:09,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:09,729 INFO L129 PetriNetUnfolder]: 0/771 cut-off events. [2022-07-19 21:19:09,729 INFO L130 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-07-19 21:19:09,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 771 events. 0/771 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2334 event pairs, 0 based on Foata normal form. 4/775 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-19 21:19:09,731 INFO L132 encePairwiseOnDemand]: 625/631 looper letters, 35 selfloop transitions, 21 changer transitions 0/544 dead transitions. [2022-07-19 21:19:09,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 544 transitions, 1391 flow [2022-07-19 21:19:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10539 transitions. [2022-07-19 21:19:09,736 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953362010414309 [2022-07-19 21:19:09,736 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10539 transitions. [2022-07-19 21:19:09,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10539 transitions. [2022-07-19 21:19:09,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:09,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10539 transitions. [2022-07-19 21:19:09,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 501.85714285714283) internal successors, (10539), 21 states have internal predecessors, (10539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:09,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 631.0) internal successors, (13882), 22 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:09,750 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 631.0) internal successors, (13882), 22 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:09,750 INFO L186 Difference]: Start difference. First operand has 561 places, 520 transitions, 1171 flow. Second operand 21 states and 10539 transitions. [2022-07-19 21:19:09,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 544 transitions, 1391 flow [2022-07-19 21:19:09,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 544 transitions, 1377 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:09,757 INFO L242 Difference]: Finished difference. Result has 585 places, 533 transitions, 1295 flow [2022-07-19 21:19:09,757 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1295, PETRI_PLACES=585, PETRI_TRANSITIONS=533} [2022-07-19 21:19:09,758 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 25 predicate places. [2022-07-19 21:19:09,758 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 533 transitions, 1295 flow [2022-07-19 21:19:09,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 501.6111111111111) internal successors, (9029), 18 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:09,759 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:09,759 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] [2022-07-19 21:19:09,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:09,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:09,977 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:09,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1939114333, now seen corresponding path program 1 times [2022-07-19 21:19:09,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:09,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909234897] [2022-07-19 21:19:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:09,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:10,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:10,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909234897] [2022-07-19 21:19:10,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909234897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:10,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652697282] [2022-07-19 21:19:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:10,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:10,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:10,126 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:10,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-19 21:19:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:10,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:10,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:10,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:10,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652697282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:10,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:10,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:10,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214726467] [2022-07-19 21:19:10,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:10,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:10,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:10,737 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-19 21:19:10,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 533 transitions, 1295 flow. Second operand has 34 states, 34 states have (on average 501.79411764705884) internal successors, (17061), 34 states have internal predecessors, (17061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:10,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:10,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-19 21:19:10,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:11,411 INFO L129 PetriNetUnfolder]: 0/683 cut-off events. [2022-07-19 21:19:11,411 INFO L130 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-07-19 21:19:11,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 683 events. 0/683 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1758 event pairs, 0 based on Foata normal form. 8/691 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-19 21:19:11,412 INFO L132 encePairwiseOnDemand]: 625/631 looper letters, 51 selfloop transitions, 45 changer transitions 0/584 dead transitions. [2022-07-19 21:19:11,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 584 transitions, 1803 flow [2022-07-19 21:19:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22559 transitions. [2022-07-19 21:19:11,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7944708575453425 [2022-07-19 21:19:11,424 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22559 transitions. [2022-07-19 21:19:11,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22559 transitions. [2022-07-19 21:19:11,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:11,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22559 transitions. [2022-07-19 21:19:11,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 501.31111111111113) internal successors, (22559), 45 states have internal predecessors, (22559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:11,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 631.0) internal successors, (29026), 46 states have internal predecessors, (29026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:11,461 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 631.0) internal successors, (29026), 46 states have internal predecessors, (29026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:11,461 INFO L186 Difference]: Start difference. First operand has 585 places, 533 transitions, 1295 flow. Second operand 45 states and 22559 transitions. [2022-07-19 21:19:11,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 584 transitions, 1803 flow [2022-07-19 21:19:11,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 584 transitions, 1763 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:11,469 INFO L242 Difference]: Finished difference. Result has 632 places, 558 transitions, 1573 flow [2022-07-19 21:19:11,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1573, PETRI_PLACES=632, PETRI_TRANSITIONS=558} [2022-07-19 21:19:11,470 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 72 predicate places. [2022-07-19 21:19:11,470 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 558 transitions, 1573 flow [2022-07-19 21:19:11,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 501.79411764705884) internal successors, (17061), 34 states have internal predecessors, (17061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:11,472 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:11,472 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:11,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:11,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:11,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1036859799, now seen corresponding path program 1 times [2022-07-19 21:19:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:11,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562828813] [2022-07-19 21:19:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:11,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:11,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:11,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562828813] [2022-07-19 21:19:11,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562828813] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:11,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919492233] [2022-07-19 21:19:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:11,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:11,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:11,996 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:11,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-19 21:19:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:12,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:12,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:12,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:13,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919492233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:13,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:13,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:13,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661144405] [2022-07-19 21:19:13,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:13,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:13,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:13,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:13,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:13,184 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-19 21:19:13,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 558 transitions, 1573 flow. Second operand has 66 states, 66 states have (on average 501.8939393939394) internal successors, (33125), 66 states have internal predecessors, (33125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:13,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:13,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-19 21:19:13,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:13,983 INFO L129 PetriNetUnfolder]: 0/650 cut-off events. [2022-07-19 21:19:13,983 INFO L130 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-07-19 21:19:13,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 650 events. 0/650 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1561 event pairs, 0 based on Foata normal form. 3/653 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-19 21:19:13,985 INFO L132 encePairwiseOnDemand]: 626/631 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-07-19 21:19:13,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 584 transitions, 1967 flow [2022-07-19 21:19:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 21:19:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-19 21:19:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27055 transitions. [2022-07-19 21:19:13,998 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940071608851323 [2022-07-19 21:19:13,998 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27055 transitions. [2022-07-19 21:19:13,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27055 transitions. [2022-07-19 21:19:14,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:14,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27055 transitions. [2022-07-19 21:19:14,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 501.01851851851853) internal successors, (27055), 54 states have internal predecessors, (27055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 631.0) internal successors, (34705), 55 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,102 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 631.0) internal successors, (34705), 55 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,102 INFO L186 Difference]: Start difference. First operand has 632 places, 558 transitions, 1573 flow. Second operand 54 states and 27055 transitions. [2022-07-19 21:19:14,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 584 transitions, 1967 flow [2022-07-19 21:19:14,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:14,111 INFO L242 Difference]: Finished difference. Result has 641 places, 553 transitions, 1559 flow [2022-07-19 21:19:14,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1559, PETRI_PLACES=641, PETRI_TRANSITIONS=553} [2022-07-19 21:19:14,111 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 81 predicate places. [2022-07-19 21:19:14,112 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 553 transitions, 1559 flow [2022-07-19 21:19:14,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 501.8939393939394) internal successors, (33125), 66 states have internal predecessors, (33125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,115 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:14,115 INFO L200 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:14,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:14,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:14,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:14,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:14,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1484304650, now seen corresponding path program 1 times [2022-07-19 21:19:14,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:14,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596596263] [2022-07-19 21:19:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:14,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:14,357 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:14,393 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:14,393 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:14,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:14,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:14,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-07-19 21:19:14,394 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:19:14,394 WARN L231 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:14,394 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-07-19 21:19:14,425 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:14,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 589 places, 664 transitions, 1724 flow [2022-07-19 21:19:14,734 INFO L129 PetriNetUnfolder]: 184/1307 cut-off events. [2022-07-19 21:19:14,735 INFO L130 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-07-19 21:19:14,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 1307 events. 184/1307 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4730 event pairs, 0 based on Foata normal form. 0/1085 useless extension candidates. Maximal degree in co-relation 1415. Up to 38 conditions per place. [2022-07-19 21:19:14,791 INFO L82 GeneralOperation]: Start removeDead. Operand has 589 places, 664 transitions, 1724 flow [2022-07-19 21:19:14,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 664 transitions, 1724 flow [2022-07-19 21:19:14,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:14,816 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:19:14,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:14,819 INFO L129 PetriNetUnfolder]: 4/78 cut-off events. [2022-07-19 21:19:14,819 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:14,819 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:14,819 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] [2022-07-19 21:19:14,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:14,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1100248866, now seen corresponding path program 1 times [2022-07-19 21:19:14,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:14,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174301770] [2022-07-19 21:19:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:14,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:14,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:14,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174301770] [2022-07-19 21:19:14,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174301770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:14,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:14,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:14,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303263405] [2022-07-19 21:19:14,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:14,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:14,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:14,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:14,836 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 526 out of 664 [2022-07-19 21:19:14,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 664 transitions, 1724 flow. Second operand has 3 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:14,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 526 of 664 [2022-07-19 21:19:14,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:15,225 INFO L129 PetriNetUnfolder]: 0/1082 cut-off events. [2022-07-19 21:19:15,225 INFO L130 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-07-19 21:19:15,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 1082 events. 0/1082 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4318 event pairs, 0 based on Foata normal form. 5515/6561 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2022-07-19 21:19:15,227 INFO L132 encePairwiseOnDemand]: 549/664 looper letters, 27 selfloop transitions, 2 changer transitions 11/555 dead transitions. [2022-07-19 21:19:15,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 555 transitions, 1564 flow [2022-07-19 21:19:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1727 transitions. [2022-07-19 21:19:15,229 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8669678714859438 [2022-07-19 21:19:15,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1727 transitions. [2022-07-19 21:19:15,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1727 transitions. [2022-07-19 21:19:15,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:15,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1727 transitions. [2022-07-19 21:19:15,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 575.6666666666666) internal successors, (1727), 3 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:15,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 664.0) internal successors, (2656), 4 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:15,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 664.0) internal successors, (2656), 4 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:15,232 INFO L186 Difference]: Start difference. First operand has 589 places, 664 transitions, 1724 flow. Second operand 3 states and 1727 transitions. [2022-07-19 21:19:15,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 555 transitions, 1564 flow [2022-07-19 21:19:15,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 555 transitions, 1258 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:15,239 INFO L242 Difference]: Finished difference. Result has 591 places, 541 transitions, 1182 flow [2022-07-19 21:19:15,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1182, PETRI_PLACES=591, PETRI_TRANSITIONS=541} [2022-07-19 21:19:15,240 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 2 predicate places. [2022-07-19 21:19:15,240 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 541 transitions, 1182 flow [2022-07-19 21:19:15,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:15,240 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:15,240 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] [2022-07-19 21:19:15,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-07-19 21:19:15,241 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash -249523786, now seen corresponding path program 1 times [2022-07-19 21:19:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:15,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322527185] [2022-07-19 21:19:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:15,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:15,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:15,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322527185] [2022-07-19 21:19:15,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322527185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:15,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805289482] [2022-07-19 21:19:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:15,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:15,280 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:15,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-19 21:19:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:15,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:15,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:15,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805289482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:15,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:15,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:15,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15534044] [2022-07-19 21:19:15,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:15,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:15,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:15,641 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-19 21:19:15,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 541 transitions, 1182 flow. Second operand has 10 states, 10 states have (on average 527.3) internal successors, (5273), 10 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:15,643 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:15,643 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-19 21:19:15,643 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:16,007 INFO L129 PetriNetUnfolder]: 0/862 cut-off events. [2022-07-19 21:19:16,007 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-19 21:19:16,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 862 events. 0/862 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2806 event pairs, 0 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-19 21:19:16,009 INFO L132 encePairwiseOnDemand]: 658/664 looper letters, 28 selfloop transitions, 9 changer transitions 0/551 dead transitions. [2022-07-19 21:19:16,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 551 transitions, 1278 flow [2022-07-19 21:19:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4764 transitions. [2022-07-19 21:19:16,012 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7971887550200804 [2022-07-19 21:19:16,012 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4764 transitions. [2022-07-19 21:19:16,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4764 transitions. [2022-07-19 21:19:16,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:16,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4764 transitions. [2022-07-19 21:19:16,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 529.3333333333334) internal successors, (4764), 9 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:16,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 664.0) internal successors, (6640), 10 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:16,019 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 664.0) internal successors, (6640), 10 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:16,019 INFO L186 Difference]: Start difference. First operand has 591 places, 541 transitions, 1182 flow. Second operand 9 states and 4764 transitions. [2022-07-19 21:19:16,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 551 transitions, 1278 flow [2022-07-19 21:19:16,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 551 transitions, 1276 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:16,026 INFO L242 Difference]: Finished difference. Result has 590 places, 547 transitions, 1230 flow [2022-07-19 21:19:16,026 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1230, PETRI_PLACES=590, PETRI_TRANSITIONS=547} [2022-07-19 21:19:16,027 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 1 predicate places. [2022-07-19 21:19:16,027 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 547 transitions, 1230 flow [2022-07-19 21:19:16,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 527.3) internal successors, (5273), 10 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:16,027 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:16,028 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] [2022-07-19 21:19:16,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:16,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-07-19 21:19:16,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:16,247 INFO L85 PathProgramCache]: Analyzing trace with hash 228153505, now seen corresponding path program 1 times [2022-07-19 21:19:16,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:16,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629454294] [2022-07-19 21:19:16,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:16,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:16,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:16,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629454294] [2022-07-19 21:19:16,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629454294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:16,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039717128] [2022-07-19 21:19:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:16,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:16,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:16,287 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:16,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-19 21:19:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:16,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:16,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:16,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:16,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039717128] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:16,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:16,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:16,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148424029] [2022-07-19 21:19:16,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:16,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:16,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:16,732 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-19 21:19:16,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 547 transitions, 1230 flow. Second operand has 18 states, 18 states have (on average 527.6111111111111) internal successors, (9497), 18 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:16,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:16,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-19 21:19:16,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:17,136 INFO L129 PetriNetUnfolder]: 0/818 cut-off events. [2022-07-19 21:19:17,136 INFO L130 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-07-19 21:19:17,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 818 events. 0/818 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2513 event pairs, 0 based on Foata normal form. 4/822 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-19 21:19:17,138 INFO L132 encePairwiseOnDemand]: 658/664 looper letters, 36 selfloop transitions, 21 changer transitions 0/571 dead transitions. [2022-07-19 21:19:17,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 571 transitions, 1452 flow [2022-07-19 21:19:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11086 transitions. [2022-07-19 21:19:17,144 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7950372920252439 [2022-07-19 21:19:17,145 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11086 transitions. [2022-07-19 21:19:17,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11086 transitions. [2022-07-19 21:19:17,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:17,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11086 transitions. [2022-07-19 21:19:17,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 527.9047619047619) internal successors, (11086), 21 states have internal predecessors, (11086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:17,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 664.0) internal successors, (14608), 22 states have internal predecessors, (14608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:17,161 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 664.0) internal successors, (14608), 22 states have internal predecessors, (14608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:17,161 INFO L186 Difference]: Start difference. First operand has 590 places, 547 transitions, 1230 flow. Second operand 21 states and 11086 transitions. [2022-07-19 21:19:17,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 571 transitions, 1452 flow [2022-07-19 21:19:17,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 571 transitions, 1438 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:17,169 INFO L242 Difference]: Finished difference. Result has 614 places, 560 transitions, 1354 flow [2022-07-19 21:19:17,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1354, PETRI_PLACES=614, PETRI_TRANSITIONS=560} [2022-07-19 21:19:17,170 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 25 predicate places. [2022-07-19 21:19:17,170 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 560 transitions, 1354 flow [2022-07-19 21:19:17,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 527.6111111111111) internal successors, (9497), 18 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:17,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:17,172 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] [2022-07-19 21:19:17,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-19 21:19:17,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:17,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1823577469, now seen corresponding path program 1 times [2022-07-19 21:19:17,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:17,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510117782] [2022-07-19 21:19:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:17,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:17,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510117782] [2022-07-19 21:19:17,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510117782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348134601] [2022-07-19 21:19:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:17,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:17,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:17,511 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:17,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-19 21:19:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:17,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:18,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348134601] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:18,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:18,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:18,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615027441] [2022-07-19 21:19:18,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:18,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:18,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:18,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:18,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-19 21:19:18,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 560 transitions, 1354 flow. Second operand has 34 states, 34 states have (on average 527.7941176470588) internal successors, (17945), 34 states have internal predecessors, (17945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:18,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-19 21:19:18,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:18,788 INFO L129 PetriNetUnfolder]: 0/730 cut-off events. [2022-07-19 21:19:18,789 INFO L130 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-07-19 21:19:18,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 730 events. 0/730 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1932 event pairs, 0 based on Foata normal form. 8/738 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-07-19 21:19:18,790 INFO L132 encePairwiseOnDemand]: 658/664 looper letters, 52 selfloop transitions, 45 changer transitions 0/611 dead transitions. [2022-07-19 21:19:18,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 611 transitions, 1864 flow [2022-07-19 21:19:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:18,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23730 transitions. [2022-07-19 21:19:18,801 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7941767068273092 [2022-07-19 21:19:18,802 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23730 transitions. [2022-07-19 21:19:18,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23730 transitions. [2022-07-19 21:19:18,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:18,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23730 transitions. [2022-07-19 21:19:18,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 527.3333333333334) internal successors, (23730), 45 states have internal predecessors, (23730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 664.0) internal successors, (30544), 46 states have internal predecessors, (30544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,834 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 664.0) internal successors, (30544), 46 states have internal predecessors, (30544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,834 INFO L186 Difference]: Start difference. First operand has 614 places, 560 transitions, 1354 flow. Second operand 45 states and 23730 transitions. [2022-07-19 21:19:18,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 611 transitions, 1864 flow [2022-07-19 21:19:18,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 611 transitions, 1824 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:18,844 INFO L242 Difference]: Finished difference. Result has 661 places, 585 transitions, 1632 flow [2022-07-19 21:19:18,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1632, PETRI_PLACES=661, PETRI_TRANSITIONS=585} [2022-07-19 21:19:18,846 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 72 predicate places. [2022-07-19 21:19:18,846 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 585 transitions, 1632 flow [2022-07-19 21:19:18,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 527.7941176470588) internal successors, (17945), 34 states have internal predecessors, (17945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:18,848 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:18,849 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:18,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:19,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-07-19 21:19:19,065 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:19,065 INFO L85 PathProgramCache]: Analyzing trace with hash 828442231, now seen corresponding path program 1 times [2022-07-19 21:19:19,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:19,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408636696] [2022-07-19 21:19:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:19,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:19,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:19,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408636696] [2022-07-19 21:19:19,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408636696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:19,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465260737] [2022-07-19 21:19:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:19,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:19,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:19,438 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:19,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-19 21:19:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:19,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:19,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:20,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465260737] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:20,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:20,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729761368] [2022-07-19 21:19:20,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:20,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:20,521 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-19 21:19:20,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 585 transitions, 1632 flow. Second operand has 66 states, 66 states have (on average 527.8939393939394) internal successors, (34841), 66 states have internal predecessors, (34841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:20,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:20,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-19 21:19:20,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:21,463 INFO L129 PetriNetUnfolder]: 0/686 cut-off events. [2022-07-19 21:19:21,464 INFO L130 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-07-19 21:19:21,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1158 conditions, 686 events. 0/686 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1659 event pairs, 0 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-07-19 21:19:21,465 INFO L132 encePairwiseOnDemand]: 659/664 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-07-19 21:19:21,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 616 transitions, 2082 flow [2022-07-19 21:19:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-19 21:19:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-07-19 21:19:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30041 transitions. [2022-07-19 21:19:21,477 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7937275417459311 [2022-07-19 21:19:21,477 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30041 transitions. [2022-07-19 21:19:21,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30041 transitions. [2022-07-19 21:19:21,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:21,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30041 transitions. [2022-07-19 21:19:21,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 527.0350877192982) internal successors, (30041), 57 states have internal predecessors, (30041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:21,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 664.0) internal successors, (38512), 58 states have internal predecessors, (38512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:21,523 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 664.0) internal successors, (38512), 58 states have internal predecessors, (38512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:21,523 INFO L186 Difference]: Start difference. First operand has 661 places, 585 transitions, 1632 flow. Second operand 57 states and 30041 transitions. [2022-07-19 21:19:21,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 616 transitions, 2082 flow [2022-07-19 21:19:21,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:21,532 INFO L242 Difference]: Finished difference. Result has 673 places, 583 transitions, 1647 flow [2022-07-19 21:19:21,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1647, PETRI_PLACES=673, PETRI_TRANSITIONS=583} [2022-07-19 21:19:21,532 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 84 predicate places. [2022-07-19 21:19:21,533 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 583 transitions, 1647 flow [2022-07-19 21:19:21,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 527.8939393939394) internal successors, (34841), 66 states have internal predecessors, (34841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:21,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:21,536 INFO L200 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:21,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-19 21:19:21,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:21,752 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:21,752 INFO L85 PathProgramCache]: Analyzing trace with hash 444372635, now seen corresponding path program 1 times [2022-07-19 21:19:21,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:21,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501066806] [2022-07-19 21:19:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:21,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:21,774 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:21,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:21,805 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:21,805 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:21,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:21,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-07-19 21:19:21,806 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:19:21,806 WARN L231 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:21,806 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-07-19 21:19:21,836 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:21,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 618 places, 697 transitions, 1831 flow [2022-07-19 21:19:22,165 INFO L129 PetriNetUnfolder]: 194/1376 cut-off events. [2022-07-19 21:19:22,165 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-19 21:19:22,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 1376 events. 194/1376 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4984 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 1505. Up to 40 conditions per place. [2022-07-19 21:19:22,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 618 places, 697 transitions, 1831 flow [2022-07-19 21:19:22,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 618 places, 697 transitions, 1831 flow [2022-07-19 21:19:22,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:22,255 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:19:22,255 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:22,257 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-19 21:19:22,258 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:22,258 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:22,258 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] [2022-07-19 21:19:22,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1672739810, now seen corresponding path program 1 times [2022-07-19 21:19:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:22,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391339844] [2022-07-19 21:19:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:22,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:22,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:22,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391339844] [2022-07-19 21:19:22,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391339844] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:22,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:22,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:22,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326800785] [2022-07-19 21:19:22,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:22,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:22,274 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 552 out of 697 [2022-07-19 21:19:22,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 697 transitions, 1831 flow. Second operand has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:22,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:22,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 552 of 697 [2022-07-19 21:19:22,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:22,673 INFO L129 PetriNetUnfolder]: 0/1140 cut-off events. [2022-07-19 21:19:22,673 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-19 21:19:22,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 1140 events. 0/1140 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4569 event pairs, 0 based on Foata normal form. 6162/7264 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2022-07-19 21:19:22,675 INFO L132 encePairwiseOnDemand]: 576/697 looper letters, 28 selfloop transitions, 2 changer transitions 11/582 dead transitions. [2022-07-19 21:19:22,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 582 transitions, 1661 flow [2022-07-19 21:19:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1812 transitions. [2022-07-19 21:19:22,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.866571018651363 [2022-07-19 21:19:22,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1812 transitions. [2022-07-19 21:19:22,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1812 transitions. [2022-07-19 21:19:22,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:22,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1812 transitions. [2022-07-19 21:19:22,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 604.0) internal successors, (1812), 3 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:22,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:22,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:22,680 INFO L186 Difference]: Start difference. First operand has 618 places, 697 transitions, 1831 flow. Second operand 3 states and 1812 transitions. [2022-07-19 21:19:22,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 582 transitions, 1661 flow [2022-07-19 21:19:22,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 582 transitions, 1319 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:22,687 INFO L242 Difference]: Finished difference. Result has 620 places, 568 transitions, 1241 flow [2022-07-19 21:19:22,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1241, PETRI_PLACES=620, PETRI_TRANSITIONS=568} [2022-07-19 21:19:22,688 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 2 predicate places. [2022-07-19 21:19:22,688 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 568 transitions, 1241 flow [2022-07-19 21:19:22,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:22,688 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:22,688 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] [2022-07-19 21:19:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-07-19 21:19:22,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1470482998, now seen corresponding path program 1 times [2022-07-19 21:19:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:22,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532039700] [2022-07-19 21:19:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:22,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:22,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:22,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532039700] [2022-07-19 21:19:22,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532039700] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:22,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264709060] [2022-07-19 21:19:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:22,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:22,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:22,710 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:22,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-19 21:19:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:23,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:23,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264709060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:23,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:23,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:23,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609301828] [2022-07-19 21:19:23,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:23,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:23,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:23,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:23,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:23,067 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-19 21:19:23,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 568 transitions, 1241 flow. Second operand has 10 states, 10 states have (on average 553.3) internal successors, (5533), 10 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:23,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:23,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-19 21:19:23,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:23,410 INFO L129 PetriNetUnfolder]: 0/909 cut-off events. [2022-07-19 21:19:23,411 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-19 21:19:23,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 909 events. 0/909 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2979 event pairs, 0 based on Foata normal form. 2/911 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-19 21:19:23,413 INFO L132 encePairwiseOnDemand]: 691/697 looper letters, 29 selfloop transitions, 9 changer transitions 0/578 dead transitions. [2022-07-19 21:19:23,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 578 transitions, 1339 flow [2022-07-19 21:19:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4999 transitions. [2022-07-19 21:19:23,416 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969073808385143 [2022-07-19 21:19:23,416 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4999 transitions. [2022-07-19 21:19:23,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4999 transitions. [2022-07-19 21:19:23,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:23,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4999 transitions. [2022-07-19 21:19:23,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 555.4444444444445) internal successors, (4999), 9 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:23,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 697.0) internal successors, (6970), 10 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:23,422 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 697.0) internal successors, (6970), 10 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:23,422 INFO L186 Difference]: Start difference. First operand has 620 places, 568 transitions, 1241 flow. Second operand 9 states and 4999 transitions. [2022-07-19 21:19:23,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 578 transitions, 1339 flow [2022-07-19 21:19:23,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 578 transitions, 1337 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:23,429 INFO L242 Difference]: Finished difference. Result has 619 places, 574 transitions, 1289 flow [2022-07-19 21:19:23,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1289, PETRI_PLACES=619, PETRI_TRANSITIONS=574} [2022-07-19 21:19:23,429 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 1 predicate places. [2022-07-19 21:19:23,429 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 574 transitions, 1289 flow [2022-07-19 21:19:23,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 553.3) internal successors, (5533), 10 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:23,430 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:23,430 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] [2022-07-19 21:19:23,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:23,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:23,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:23,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1494018209, now seen corresponding path program 1 times [2022-07-19 21:19:23,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:23,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950833133] [2022-07-19 21:19:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:23,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:23,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:23,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950833133] [2022-07-19 21:19:23,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950833133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:23,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128619022] [2022-07-19 21:19:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:23,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:23,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:23,688 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:23,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-19 21:19:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:24,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:24,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:24,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128619022] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:24,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:24,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:24,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720683746] [2022-07-19 21:19:24,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:24,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:24,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:24,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:24,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:24,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-19 21:19:24,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 574 transitions, 1289 flow. Second operand has 18 states, 18 states have (on average 553.6111111111111) internal successors, (9965), 18 states have internal predecessors, (9965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:24,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:24,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-19 21:19:24,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:24,533 INFO L129 PetriNetUnfolder]: 0/865 cut-off events. [2022-07-19 21:19:24,533 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-07-19 21:19:24,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 865 events. 0/865 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2685 event pairs, 0 based on Foata normal form. 4/869 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-19 21:19:24,535 INFO L132 encePairwiseOnDemand]: 691/697 looper letters, 37 selfloop transitions, 21 changer transitions 0/598 dead transitions. [2022-07-19 21:19:24,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 598 transitions, 1513 flow [2022-07-19 21:19:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11633 transitions. [2022-07-19 21:19:24,541 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.79476668716267 [2022-07-19 21:19:24,541 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11633 transitions. [2022-07-19 21:19:24,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11633 transitions. [2022-07-19 21:19:24,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:24,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11633 transitions. [2022-07-19 21:19:24,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 553.952380952381) internal successors, (11633), 21 states have internal predecessors, (11633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:24,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 697.0) internal successors, (15334), 22 states have internal predecessors, (15334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:24,555 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 697.0) internal successors, (15334), 22 states have internal predecessors, (15334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:24,555 INFO L186 Difference]: Start difference. First operand has 619 places, 574 transitions, 1289 flow. Second operand 21 states and 11633 transitions. [2022-07-19 21:19:24,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 598 transitions, 1513 flow [2022-07-19 21:19:24,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 598 transitions, 1499 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:24,562 INFO L242 Difference]: Finished difference. Result has 643 places, 587 transitions, 1413 flow [2022-07-19 21:19:24,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1413, PETRI_PLACES=643, PETRI_TRANSITIONS=587} [2022-07-19 21:19:24,563 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 25 predicate places. [2022-07-19 21:19:24,563 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 587 transitions, 1413 flow [2022-07-19 21:19:24,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 553.6111111111111) internal successors, (9965), 18 states have internal predecessors, (9965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:24,564 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:24,564 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] [2022-07-19 21:19:24,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:24,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:24,771 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:24,772 INFO L85 PathProgramCache]: Analyzing trace with hash -432379517, now seen corresponding path program 1 times [2022-07-19 21:19:24,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:24,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447685220] [2022-07-19 21:19:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:24,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:24,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:24,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447685220] [2022-07-19 21:19:24,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447685220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:24,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458250553] [2022-07-19 21:19:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:24,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:24,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:24,915 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:24,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-19 21:19:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:25,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:25,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:25,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:25,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458250553] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:25,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:25,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:25,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711384717] [2022-07-19 21:19:25,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:25,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:25,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:25,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:25,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:25,543 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-19 21:19:25,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 587 transitions, 1413 flow. Second operand has 34 states, 34 states have (on average 553.7941176470588) internal successors, (18829), 34 states have internal predecessors, (18829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:25,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:25,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-19 21:19:25,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:26,112 INFO L129 PetriNetUnfolder]: 0/777 cut-off events. [2022-07-19 21:19:26,112 INFO L130 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2022-07-19 21:19:26,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 777 events. 0/777 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2101 event pairs, 0 based on Foata normal form. 8/785 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-19 21:19:26,113 INFO L132 encePairwiseOnDemand]: 691/697 looper letters, 53 selfloop transitions, 45 changer transitions 0/638 dead transitions. [2022-07-19 21:19:26,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 638 transitions, 1925 flow [2022-07-19 21:19:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 24901 transitions. [2022-07-19 21:19:26,125 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7939104096923322 [2022-07-19 21:19:26,125 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 24901 transitions. [2022-07-19 21:19:26,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 24901 transitions. [2022-07-19 21:19:26,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:26,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 24901 transitions. [2022-07-19 21:19:26,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 553.3555555555556) internal successors, (24901), 45 states have internal predecessors, (24901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:26,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 697.0) internal successors, (32062), 46 states have internal predecessors, (32062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:26,158 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 697.0) internal successors, (32062), 46 states have internal predecessors, (32062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:26,158 INFO L186 Difference]: Start difference. First operand has 643 places, 587 transitions, 1413 flow. Second operand 45 states and 24901 transitions. [2022-07-19 21:19:26,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 638 transitions, 1925 flow [2022-07-19 21:19:26,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 638 transitions, 1885 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:26,167 INFO L242 Difference]: Finished difference. Result has 690 places, 612 transitions, 1691 flow [2022-07-19 21:19:26,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1691, PETRI_PLACES=690, PETRI_TRANSITIONS=612} [2022-07-19 21:19:26,168 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 72 predicate places. [2022-07-19 21:19:26,168 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 612 transitions, 1691 flow [2022-07-19 21:19:26,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 553.7941176470588) internal successors, (18829), 34 states have internal predecessors, (18829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:26,169 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:26,170 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:26,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:26,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:26,391 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:26,391 INFO L85 PathProgramCache]: Analyzing trace with hash 439149431, now seen corresponding path program 1 times [2022-07-19 21:19:26,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:26,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588637452] [2022-07-19 21:19:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:26,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:26,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:26,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588637452] [2022-07-19 21:19:26,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588637452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:26,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594582176] [2022-07-19 21:19:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:26,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:26,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:26,700 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:26,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-19 21:19:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:27,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:27,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:27,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:27,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594582176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:27,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:27,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:27,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995072891] [2022-07-19 21:19:27,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:27,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:27,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:27,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:27,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:27,996 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-19 21:19:28,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 612 transitions, 1691 flow. Second operand has 66 states, 66 states have (on average 553.8939393939394) internal successors, (36557), 66 states have internal predecessors, (36557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:28,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:28,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-19 21:19:28,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:28,990 INFO L129 PetriNetUnfolder]: 0/722 cut-off events. [2022-07-19 21:19:28,990 INFO L130 PetriNetUnfolder]: For 772/772 co-relation queries the response was YES. [2022-07-19 21:19:28,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 722 events. 0/722 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1757 event pairs, 0 based on Foata normal form. 5/727 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2022-07-19 21:19:28,991 INFO L132 encePairwiseOnDemand]: 692/697 looper letters, 60 selfloop transitions, 58 changer transitions 0/648 dead transitions. [2022-07-19 21:19:28,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 648 transitions, 2197 flow [2022-07-19 21:19:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 21:19:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-19 21:19:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 33183 transitions. [2022-07-19 21:19:29,006 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934720229555237 [2022-07-19 21:19:29,006 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 33183 transitions. [2022-07-19 21:19:29,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 33183 transitions. [2022-07-19 21:19:29,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:29,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 33183 transitions. [2022-07-19 21:19:29,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 553.05) internal successors, (33183), 60 states have internal predecessors, (33183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:29,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 697.0) internal successors, (42517), 61 states have internal predecessors, (42517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:29,061 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 697.0) internal successors, (42517), 61 states have internal predecessors, (42517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:29,061 INFO L186 Difference]: Start difference. First operand has 690 places, 612 transitions, 1691 flow. Second operand 60 states and 33183 transitions. [2022-07-19 21:19:29,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 648 transitions, 2197 flow [2022-07-19 21:19:29,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 648 transitions, 2036 flow, removed 14 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:29,071 INFO L242 Difference]: Finished difference. Result has 705 places, 613 transitions, 1735 flow [2022-07-19 21:19:29,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=1735, PETRI_PLACES=705, PETRI_TRANSITIONS=613} [2022-07-19 21:19:29,072 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 87 predicate places. [2022-07-19 21:19:29,072 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 613 transitions, 1735 flow [2022-07-19 21:19:29,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 553.8939393939394) internal successors, (36557), 66 states have internal predecessors, (36557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:29,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:29,076 INFO L200 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:29,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:29,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-07-19 21:19:29,295 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:29,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1902582593, now seen corresponding path program 1 times [2022-07-19 21:19:29,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:29,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623426761] [2022-07-19 21:19:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:29,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:29,321 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:29,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:29,356 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:29,356 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:29,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:29,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-07-19 21:19:29,357 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:19:29,358 WARN L231 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:29,358 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2022-07-19 21:19:29,392 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:29,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 647 places, 730 transitions, 1940 flow [2022-07-19 21:19:29,763 INFO L129 PetriNetUnfolder]: 204/1445 cut-off events. [2022-07-19 21:19:29,763 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-07-19 21:19:29,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1716 conditions, 1445 events. 204/1445 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5244 event pairs, 0 based on Foata normal form. 0/1199 useless extension candidates. Maximal degree in co-relation 1596. Up to 42 conditions per place. [2022-07-19 21:19:29,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 647 places, 730 transitions, 1940 flow [2022-07-19 21:19:29,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 647 places, 730 transitions, 1940 flow [2022-07-19 21:19:29,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:29,864 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:19:29,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:29,867 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2022-07-19 21:19:29,867 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:29,867 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:29,868 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] [2022-07-19 21:19:29,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2123599711, now seen corresponding path program 1 times [2022-07-19 21:19:29,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:29,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803134278] [2022-07-19 21:19:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:29,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:29,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:29,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803134278] [2022-07-19 21:19:29,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803134278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:29,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:29,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:19:29,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839017729] [2022-07-19 21:19:29,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:29,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:19:29,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:29,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:19:29,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:19:29,882 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 585 out of 730 [2022-07-19 21:19:29,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 730 transitions, 1940 flow. Second operand has 2 states, 2 states have (on average 585.5) internal successors, (1171), 2 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:29,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:29,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 585 of 730 [2022-07-19 21:19:29,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:30,295 INFO L129 PetriNetUnfolder]: 0/1220 cut-off events. [2022-07-19 21:19:30,295 INFO L130 PetriNetUnfolder]: For 1730/1730 co-relation queries the response was YES. [2022-07-19 21:19:30,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1220 events. 0/1220 cut-off events. For 1730/1730 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4924 event pairs, 0 based on Foata normal form. 1232/2410 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-07-19 21:19:30,297 INFO L132 encePairwiseOnDemand]: 606/730 looper letters, 20 selfloop transitions, 0 changer transitions 11/605 dead transitions. [2022-07-19 21:19:30,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 605 transitions, 1730 flow [2022-07-19 21:19:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:19:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:19:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1314 transitions. [2022-07-19 21:19:30,299 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-19 21:19:30,299 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1314 transitions. [2022-07-19 21:19:30,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1314 transitions. [2022-07-19 21:19:30,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:30,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1314 transitions. [2022-07-19 21:19:30,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 657.0) internal successors, (1314), 2 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 730.0) internal successors, (2190), 3 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) [2022-07-19 21:19:30,302 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 730.0) internal successors, (2190), 3 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) [2022-07-19 21:19:30,302 INFO L186 Difference]: Start difference. First operand has 647 places, 730 transitions, 1940 flow. Second operand 2 states and 1314 transitions. [2022-07-19 21:19:30,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 605 transitions, 1730 flow [2022-07-19 21:19:30,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 605 transitions, 1350 flow, removed 190 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:30,310 INFO L242 Difference]: Finished difference. Result has 647 places, 594 transitions, 1288 flow [2022-07-19 21:19:30,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1288, PETRI_PLACES=647, PETRI_TRANSITIONS=594} [2022-07-19 21:19:30,311 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 0 predicate places. [2022-07-19 21:19:30,311 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 594 transitions, 1288 flow [2022-07-19 21:19:30,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 585.5) internal successors, (1171), 2 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,311 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:30,311 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] [2022-07-19 21:19:30,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-07-19 21:19:30,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:30,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:30,312 INFO L85 PathProgramCache]: Analyzing trace with hash 374416226, now seen corresponding path program 1 times [2022-07-19 21:19:30,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:30,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627409434] [2022-07-19 21:19:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:30,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:30,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627409434] [2022-07-19 21:19:30,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627409434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:30,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:30,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634763413] [2022-07-19 21:19:30,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:30,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:30,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:30,330 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 578 out of 730 [2022-07-19 21:19:30,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 594 transitions, 1288 flow. Second operand has 3 states, 3 states have (on average 579.0) internal successors, (1737), 3 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:30,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 578 of 730 [2022-07-19 21:19:30,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:30,678 INFO L129 PetriNetUnfolder]: 0/978 cut-off events. [2022-07-19 21:19:30,678 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:19:30,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 978 events. 0/978 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3261 event pairs, 0 based on Foata normal form. 0/958 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2022-07-19 21:19:30,680 INFO L132 encePairwiseOnDemand]: 727/730 looper letters, 29 selfloop transitions, 2 changer transitions 0/598 dead transitions. [2022-07-19 21:19:30,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 598 transitions, 1358 flow [2022-07-19 21:19:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1766 transitions. [2022-07-19 21:19:30,682 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.806392694063927 [2022-07-19 21:19:30,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1766 transitions. [2022-07-19 21:19:30,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1766 transitions. [2022-07-19 21:19:30,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:30,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1766 transitions. [2022-07-19 21:19:30,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 588.6666666666666) internal successors, (1766), 3 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 730.0) internal successors, (2920), 4 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 730.0) internal successors, (2920), 4 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,685 INFO L186 Difference]: Start difference. First operand has 647 places, 594 transitions, 1288 flow. Second operand 3 states and 1766 transitions. [2022-07-19 21:19:30,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 598 transitions, 1358 flow [2022-07-19 21:19:30,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 598 transitions, 1358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:30,691 INFO L242 Difference]: Finished difference. Result has 639 places, 595 transitions, 1300 flow [2022-07-19 21:19:30,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1300, PETRI_PLACES=639, PETRI_TRANSITIONS=595} [2022-07-19 21:19:30,692 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, -8 predicate places. [2022-07-19 21:19:30,692 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 595 transitions, 1300 flow [2022-07-19 21:19:30,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 579.0) internal successors, (1737), 3 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:30,693 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:30,693 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] [2022-07-19 21:19:30,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-07-19 21:19:30,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:30,693 INFO L85 PathProgramCache]: Analyzing trace with hash 87751190, now seen corresponding path program 1 times [2022-07-19 21:19:30,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:30,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893046840] [2022-07-19 21:19:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:30,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:30,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:30,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893046840] [2022-07-19 21:19:30,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893046840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:30,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265502185] [2022-07-19 21:19:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:30,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:30,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:30,728 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:30,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-19 21:19:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:31,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:31,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:31,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:31,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265502185] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:31,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:31,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:31,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251435610] [2022-07-19 21:19:31,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:31,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:31,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:31,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-19 21:19:31,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 595 transitions, 1300 flow. Second operand has 10 states, 10 states have (on average 579.3) internal successors, (5793), 10 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:31,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:31,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-19 21:19:31,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:31,517 INFO L129 PetriNetUnfolder]: 0/956 cut-off events. [2022-07-19 21:19:31,517 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-19 21:19:31,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1223 conditions, 956 events. 0/956 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3150 event pairs, 0 based on Foata normal form. 2/958 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-19 21:19:31,519 INFO L132 encePairwiseOnDemand]: 724/730 looper letters, 30 selfloop transitions, 9 changer transitions 0/605 dead transitions. [2022-07-19 21:19:31,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 605 transitions, 1400 flow [2022-07-19 21:19:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5234 transitions. [2022-07-19 21:19:31,522 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7966514459665145 [2022-07-19 21:19:31,522 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5234 transitions. [2022-07-19 21:19:31,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5234 transitions. [2022-07-19 21:19:31,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:31,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5234 transitions. [2022-07-19 21:19:31,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 581.5555555555555) internal successors, (5234), 9 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:31,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 730.0) internal successors, (7300), 10 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:31,529 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 730.0) internal successors, (7300), 10 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:31,529 INFO L186 Difference]: Start difference. First operand has 639 places, 595 transitions, 1300 flow. Second operand 9 states and 5234 transitions. [2022-07-19 21:19:31,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 605 transitions, 1400 flow [2022-07-19 21:19:31,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 605 transitions, 1398 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:31,536 INFO L242 Difference]: Finished difference. Result has 649 places, 601 transitions, 1348 flow [2022-07-19 21:19:31,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1348, PETRI_PLACES=649, PETRI_TRANSITIONS=601} [2022-07-19 21:19:31,537 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 2 predicate places. [2022-07-19 21:19:31,537 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 601 transitions, 1348 flow [2022-07-19 21:19:31,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 579.3) internal successors, (5793), 10 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:31,538 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:31,538 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] [2022-07-19 21:19:31,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:31,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:31,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash -151830207, now seen corresponding path program 1 times [2022-07-19 21:19:31,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:31,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215914097] [2022-07-19 21:19:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:31,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:31,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:31,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215914097] [2022-07-19 21:19:31,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215914097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:31,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970510667] [2022-07-19 21:19:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:31,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:31,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:31,801 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:31,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-19 21:19:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:32,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:32,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:32,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970510667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:32,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:32,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:32,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782910216] [2022-07-19 21:19:32,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:32,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:32,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:32,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:32,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:32,271 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-19 21:19:32,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 601 transitions, 1348 flow. Second operand has 18 states, 18 states have (on average 579.6111111111111) internal successors, (10433), 18 states have internal predecessors, (10433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:32,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:32,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-19 21:19:32,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:32,749 INFO L129 PetriNetUnfolder]: 0/912 cut-off events. [2022-07-19 21:19:32,749 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-19 21:19:32,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 912 events. 0/912 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2858 event pairs, 0 based on Foata normal form. 4/916 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-19 21:19:32,752 INFO L132 encePairwiseOnDemand]: 724/730 looper letters, 38 selfloop transitions, 21 changer transitions 0/625 dead transitions. [2022-07-19 21:19:32,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 625 transitions, 1574 flow [2022-07-19 21:19:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12180 transitions. [2022-07-19 21:19:32,757 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945205479452054 [2022-07-19 21:19:32,757 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12180 transitions. [2022-07-19 21:19:32,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12180 transitions. [2022-07-19 21:19:32,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:32,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12180 transitions. [2022-07-19 21:19:32,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 580.0) internal successors, (12180), 21 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:32,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 730.0) internal successors, (16060), 22 states have internal predecessors, (16060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:32,771 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 730.0) internal successors, (16060), 22 states have internal predecessors, (16060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:32,771 INFO L186 Difference]: Start difference. First operand has 649 places, 601 transitions, 1348 flow. Second operand 21 states and 12180 transitions. [2022-07-19 21:19:32,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 625 transitions, 1574 flow [2022-07-19 21:19:32,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 625 transitions, 1560 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:32,779 INFO L242 Difference]: Finished difference. Result has 673 places, 614 transitions, 1472 flow [2022-07-19 21:19:32,779 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1472, PETRI_PLACES=673, PETRI_TRANSITIONS=614} [2022-07-19 21:19:32,779 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 26 predicate places. [2022-07-19 21:19:32,779 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 614 transitions, 1472 flow [2022-07-19 21:19:32,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 579.6111111111111) internal successors, (10433), 18 states have internal predecessors, (10433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:32,781 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:32,781 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] [2022-07-19 21:19:32,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:32,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-07-19 21:19:32,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:32,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:32,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2060487773, now seen corresponding path program 1 times [2022-07-19 21:19:32,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:32,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062202773] [2022-07-19 21:19:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:32,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:33,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:33,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062202773] [2022-07-19 21:19:33,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062202773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:33,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943836682] [2022-07-19 21:19:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:33,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:33,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:33,132 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:33,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-19 21:19:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:33,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:33,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:33,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943836682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:33,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:33,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:33,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822335957] [2022-07-19 21:19:33,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:33,803 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-19 21:19:33,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 614 transitions, 1472 flow. Second operand has 34 states, 34 states have (on average 579.7941176470588) internal successors, (19713), 34 states have internal predecessors, (19713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:33,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:33,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-19 21:19:33,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:34,464 INFO L129 PetriNetUnfolder]: 0/824 cut-off events. [2022-07-19 21:19:34,464 INFO L130 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2022-07-19 21:19:34,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 824 events. 0/824 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2268 event pairs, 0 based on Foata normal form. 8/832 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-07-19 21:19:34,466 INFO L132 encePairwiseOnDemand]: 724/730 looper letters, 54 selfloop transitions, 45 changer transitions 0/665 dead transitions. [2022-07-19 21:19:34,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 665 transitions, 1986 flow [2022-07-19 21:19:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 26072 transitions. [2022-07-19 21:19:34,478 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7936681887366819 [2022-07-19 21:19:34,478 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 26072 transitions. [2022-07-19 21:19:34,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 26072 transitions. [2022-07-19 21:19:34,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:34,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 26072 transitions. [2022-07-19 21:19:34,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 579.3777777777777) internal successors, (26072), 45 states have internal predecessors, (26072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:34,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 730.0) internal successors, (33580), 46 states have internal predecessors, (33580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:34,515 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 730.0) internal successors, (33580), 46 states have internal predecessors, (33580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:34,515 INFO L186 Difference]: Start difference. First operand has 673 places, 614 transitions, 1472 flow. Second operand 45 states and 26072 transitions. [2022-07-19 21:19:34,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 665 transitions, 1986 flow [2022-07-19 21:19:34,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 665 transitions, 1946 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:34,524 INFO L242 Difference]: Finished difference. Result has 720 places, 639 transitions, 1750 flow [2022-07-19 21:19:34,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1750, PETRI_PLACES=720, PETRI_TRANSITIONS=639} [2022-07-19 21:19:34,525 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 73 predicate places. [2022-07-19 21:19:34,525 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 639 transitions, 1750 flow [2022-07-19 21:19:34,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 579.7941176470588) internal successors, (19713), 34 states have internal predecessors, (19713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:34,527 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:34,527 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:34,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:34,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-07-19 21:19:34,737 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:34,737 INFO L85 PathProgramCache]: Analyzing trace with hash -131018601, now seen corresponding path program 1 times [2022-07-19 21:19:34,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:34,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21840122] [2022-07-19 21:19:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:34,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:35,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:35,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21840122] [2022-07-19 21:19:35,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21840122] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:35,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982995777] [2022-07-19 21:19:35,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:35,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:35,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:35,175 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:35,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-19 21:19:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:35,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:35,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:36,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982995777] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:36,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:36,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:36,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146672098] [2022-07-19 21:19:36,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:36,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:36,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:36,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:36,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:36,715 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-19 21:19:36,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 639 transitions, 1750 flow. Second operand has 66 states, 66 states have (on average 579.8939393939394) internal successors, (38273), 66 states have internal predecessors, (38273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:36,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:36,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-19 21:19:36,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:37,712 INFO L129 PetriNetUnfolder]: 0/758 cut-off events. [2022-07-19 21:19:37,712 INFO L130 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2022-07-19 21:19:37,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 758 events. 0/758 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1855 event pairs, 0 based on Foata normal form. 6/764 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-19 21:19:37,714 INFO L132 encePairwiseOnDemand]: 725/730 looper letters, 63 selfloop transitions, 61 changer transitions 0/680 dead transitions. [2022-07-19 21:19:37,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 680 transitions, 2312 flow [2022-07-19 21:19:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-19 21:19:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-19 21:19:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 36481 transitions. [2022-07-19 21:19:37,729 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.793237660360948 [2022-07-19 21:19:37,730 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 36481 transitions. [2022-07-19 21:19:37,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 36481 transitions. [2022-07-19 21:19:37,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:37,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 36481 transitions. [2022-07-19 21:19:37,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 579.063492063492) internal successors, (36481), 63 states have internal predecessors, (36481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:37,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 730.0) internal successors, (46720), 64 states have internal predecessors, (46720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:37,787 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 730.0) internal successors, (46720), 64 states have internal predecessors, (46720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:37,787 INFO L186 Difference]: Start difference. First operand has 720 places, 639 transitions, 1750 flow. Second operand 63 states and 36481 transitions. [2022-07-19 21:19:37,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 680 transitions, 2312 flow [2022-07-19 21:19:37,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 680 transitions, 2143 flow, removed 15 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:37,797 INFO L242 Difference]: Finished difference. Result has 738 places, 643 transitions, 1823 flow [2022-07-19 21:19:37,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=730, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1823, PETRI_PLACES=738, PETRI_TRANSITIONS=643} [2022-07-19 21:19:37,798 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 91 predicate places. [2022-07-19 21:19:37,798 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 643 transitions, 1823 flow [2022-07-19 21:19:37,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 579.8939393939394) internal successors, (38273), 66 states have internal predecessors, (38273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:37,802 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:37,802 INFO L200 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:37,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-19 21:19:38,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash -988310136, now seen corresponding path program 1 times [2022-07-19 21:19:38,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:38,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61594234] [2022-07-19 21:19:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:38,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:38,040 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:38,076 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:38,076 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:38,077 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:38,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:38,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-07-19 21:19:38,077 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:38,077 WARN L231 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:38,077 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2022-07-19 21:19:38,121 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:38,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 676 places, 763 transitions, 2051 flow [2022-07-19 21:19:38,537 INFO L129 PetriNetUnfolder]: 214/1514 cut-off events. [2022-07-19 21:19:38,537 INFO L130 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-07-19 21:19:38,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 1514 events. 214/1514 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5512 event pairs, 0 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 1688. Up to 44 conditions per place. [2022-07-19 21:19:38,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 676 places, 763 transitions, 2051 flow [2022-07-19 21:19:38,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 676 places, 763 transitions, 2051 flow [2022-07-19 21:19:38,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:38,652 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:19:38,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:38,654 INFO L129 PetriNetUnfolder]: 5/77 cut-off events. [2022-07-19 21:19:38,655 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:38,655 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:38,655 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:38,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash -997770527, now seen corresponding path program 1 times [2022-07-19 21:19:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:38,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90953718] [2022-07-19 21:19:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:38,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:38,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90953718] [2022-07-19 21:19:38,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90953718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:38,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:38,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:19:38,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283191647] [2022-07-19 21:19:38,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:38,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:19:38,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:19:38,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:19:38,671 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 611 out of 763 [2022-07-19 21:19:38,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 763 transitions, 2051 flow. Second operand has 2 states, 2 states have (on average 611.5) internal successors, (1223), 2 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:38,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:38,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 611 of 763 [2022-07-19 21:19:38,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:39,084 INFO L129 PetriNetUnfolder]: 0/1278 cut-off events. [2022-07-19 21:19:39,084 INFO L130 PetriNetUnfolder]: For 1981/1981 co-relation queries the response was YES. [2022-07-19 21:19:39,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 1278 events. 0/1278 cut-off events. For 1981/1981 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5176 event pairs, 0 based on Foata normal form. 1356/2590 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2022-07-19 21:19:39,086 INFO L132 encePairwiseOnDemand]: 633/763 looper letters, 21 selfloop transitions, 0 changer transitions 11/632 dead transitions. [2022-07-19 21:19:39,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 632 transitions, 1831 flow [2022-07-19 21:19:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:19:39,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:19:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1373 transitions. [2022-07-19 21:19:39,088 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8997378768020969 [2022-07-19 21:19:39,088 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1373 transitions. [2022-07-19 21:19:39,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1373 transitions. [2022-07-19 21:19:39,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:39,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1373 transitions. [2022-07-19 21:19:39,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 686.5) internal successors, (1373), 2 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:39,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 763.0) internal successors, (2289), 3 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:39,090 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 763.0) internal successors, (2289), 3 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:39,090 INFO L186 Difference]: Start difference. First operand has 676 places, 763 transitions, 2051 flow. Second operand 2 states and 1373 transitions. [2022-07-19 21:19:39,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 632 transitions, 1831 flow [2022-07-19 21:19:39,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 632 transitions, 1411 flow, removed 210 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:39,098 INFO L242 Difference]: Finished difference. Result has 676 places, 621 transitions, 1347 flow [2022-07-19 21:19:39,099 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1347, PETRI_PLACES=676, PETRI_TRANSITIONS=621} [2022-07-19 21:19:39,099 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 0 predicate places. [2022-07-19 21:19:39,099 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 621 transitions, 1347 flow [2022-07-19 21:19:39,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 611.5) internal successors, (1223), 2 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:39,100 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:39,100 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] [2022-07-19 21:19:39,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-07-19 21:19:39,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:39,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1500245410, now seen corresponding path program 1 times [2022-07-19 21:19:39,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:39,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706571473] [2022-07-19 21:19:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:39,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:39,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:39,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706571473] [2022-07-19 21:19:39,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706571473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:39,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:39,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:39,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646786467] [2022-07-19 21:19:39,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:39,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:39,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:39,118 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 604 out of 763 [2022-07-19 21:19:39,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 621 transitions, 1347 flow. Second operand has 3 states, 3 states have (on average 605.0) internal successors, (1815), 3 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:39,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:39,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 604 of 763 [2022-07-19 21:19:39,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:39,492 INFO L129 PetriNetUnfolder]: 0/1025 cut-off events. [2022-07-19 21:19:39,493 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-19 21:19:39,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 1025 events. 0/1025 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3431 event pairs, 0 based on Foata normal form. 0/1004 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2022-07-19 21:19:39,495 INFO L132 encePairwiseOnDemand]: 760/763 looper letters, 30 selfloop transitions, 2 changer transitions 0/625 dead transitions. [2022-07-19 21:19:39,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 625 transitions, 1419 flow [2022-07-19 21:19:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1845 transitions. [2022-07-19 21:19:39,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8060288335517694 [2022-07-19 21:19:39,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1845 transitions. [2022-07-19 21:19:39,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1845 transitions. [2022-07-19 21:19:39,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:39,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1845 transitions. [2022-07-19 21:19:39,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 615.0) internal successors, (1845), 3 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:39,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:39,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:39,500 INFO L186 Difference]: Start difference. First operand has 676 places, 621 transitions, 1347 flow. Second operand 3 states and 1845 transitions. [2022-07-19 21:19:39,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 625 transitions, 1419 flow [2022-07-19 21:19:39,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 625 transitions, 1419 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:39,506 INFO L242 Difference]: Finished difference. Result has 668 places, 622 transitions, 1359 flow [2022-07-19 21:19:39,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1359, PETRI_PLACES=668, PETRI_TRANSITIONS=622} [2022-07-19 21:19:39,507 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, -8 predicate places. [2022-07-19 21:19:39,507 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 622 transitions, 1359 flow [2022-07-19 21:19:39,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 605.0) internal successors, (1815), 3 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:39,508 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:39,508 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:39,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-07-19 21:19:39,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash -102751914, now seen corresponding path program 1 times [2022-07-19 21:19:39,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:39,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111673061] [2022-07-19 21:19:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:39,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:39,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:39,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111673061] [2022-07-19 21:19:39,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111673061] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:39,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053177305] [2022-07-19 21:19:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:39,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:39,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:39,533 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:39,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-19 21:19:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:39,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:39,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:39,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053177305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:39,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:39,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:39,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680277487] [2022-07-19 21:19:39,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:39,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:39,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:39,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:39,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:39,948 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-19 21:19:39,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 622 transitions, 1359 flow. Second operand has 10 states, 10 states have (on average 605.3) internal successors, (6053), 10 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:39,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:39,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-19 21:19:39,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:40,403 INFO L129 PetriNetUnfolder]: 0/1003 cut-off events. [2022-07-19 21:19:40,403 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-19 21:19:40,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 1003 events. 0/1003 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3319 event pairs, 0 based on Foata normal form. 2/1005 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-19 21:19:40,405 INFO L132 encePairwiseOnDemand]: 757/763 looper letters, 31 selfloop transitions, 9 changer transitions 0/632 dead transitions. [2022-07-19 21:19:40,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 632 transitions, 1461 flow [2022-07-19 21:19:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5469 transitions. [2022-07-19 21:19:40,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7964176496286588 [2022-07-19 21:19:40,408 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5469 transitions. [2022-07-19 21:19:40,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5469 transitions. [2022-07-19 21:19:40,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:40,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5469 transitions. [2022-07-19 21:19:40,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 607.6666666666666) internal successors, (5469), 9 states have internal predecessors, (5469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:40,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 763.0) internal successors, (7630), 10 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:40,415 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 763.0) internal successors, (7630), 10 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:40,415 INFO L186 Difference]: Start difference. First operand has 668 places, 622 transitions, 1359 flow. Second operand 9 states and 5469 transitions. [2022-07-19 21:19:40,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 632 transitions, 1461 flow [2022-07-19 21:19:40,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 632 transitions, 1459 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:40,421 INFO L242 Difference]: Finished difference. Result has 678 places, 628 transitions, 1407 flow [2022-07-19 21:19:40,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1407, PETRI_PLACES=678, PETRI_TRANSITIONS=628} [2022-07-19 21:19:40,422 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 2 predicate places. [2022-07-19 21:19:40,422 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 628 transitions, 1407 flow [2022-07-19 21:19:40,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 605.3) internal successors, (6053), 10 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:40,423 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:40,423 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] [2022-07-19 21:19:40,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:40,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:40,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:40,636 INFO L85 PathProgramCache]: Analyzing trace with hash -414424447, now seen corresponding path program 1 times [2022-07-19 21:19:40,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:40,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987652407] [2022-07-19 21:19:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:40,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:40,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:40,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987652407] [2022-07-19 21:19:40,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987652407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:40,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167298578] [2022-07-19 21:19:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:40,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:40,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:40,677 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:40,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-19 21:19:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:41,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:41,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:41,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:41,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167298578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:41,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:41,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:41,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423725835] [2022-07-19 21:19:41,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:41,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:41,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:41,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:41,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:41,176 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-19 21:19:41,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 628 transitions, 1407 flow. Second operand has 18 states, 18 states have (on average 605.6111111111111) internal successors, (10901), 18 states have internal predecessors, (10901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:41,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:41,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-19 21:19:41,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:41,713 INFO L129 PetriNetUnfolder]: 0/959 cut-off events. [2022-07-19 21:19:41,713 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-07-19 21:19:41,713 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 959 events. 0/959 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3013 event pairs, 0 based on Foata normal form. 4/963 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-19 21:19:41,715 INFO L132 encePairwiseOnDemand]: 757/763 looper letters, 39 selfloop transitions, 21 changer transitions 0/652 dead transitions. [2022-07-19 21:19:41,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 652 transitions, 1635 flow [2022-07-19 21:19:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12727 transitions. [2022-07-19 21:19:41,721 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7942956999313486 [2022-07-19 21:19:41,721 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12727 transitions. [2022-07-19 21:19:41,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12727 transitions. [2022-07-19 21:19:41,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:41,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12727 transitions. [2022-07-19 21:19:41,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 606.047619047619) internal successors, (12727), 21 states have internal predecessors, (12727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:41,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 763.0) internal successors, (16786), 22 states have internal predecessors, (16786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:41,737 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 763.0) internal successors, (16786), 22 states have internal predecessors, (16786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:41,738 INFO L186 Difference]: Start difference. First operand has 678 places, 628 transitions, 1407 flow. Second operand 21 states and 12727 transitions. [2022-07-19 21:19:41,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 652 transitions, 1635 flow [2022-07-19 21:19:41,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 652 transitions, 1621 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:41,745 INFO L242 Difference]: Finished difference. Result has 702 places, 641 transitions, 1531 flow [2022-07-19 21:19:41,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1531, PETRI_PLACES=702, PETRI_TRANSITIONS=641} [2022-07-19 21:19:41,746 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 26 predicate places. [2022-07-19 21:19:41,746 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 641 transitions, 1531 flow [2022-07-19 21:19:41,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 605.6111111111111) internal successors, (10901), 18 states have internal predecessors, (10901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:41,747 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:41,748 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] [2022-07-19 21:19:41,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-07-19 21:19:41,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:41,966 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:41,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1882032355, now seen corresponding path program 1 times [2022-07-19 21:19:41,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:41,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562644706] [2022-07-19 21:19:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:41,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:42,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:42,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562644706] [2022-07-19 21:19:42,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562644706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:42,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875170008] [2022-07-19 21:19:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:42,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:42,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:42,072 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:42,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-19 21:19:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:42,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:42,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:42,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875170008] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:42,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:42,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:42,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914358861] [2022-07-19 21:19:42,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:42,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:42,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:42,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:42,833 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-19 21:19:42,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 641 transitions, 1531 flow. Second operand has 34 states, 34 states have (on average 605.7941176470588) internal successors, (20597), 34 states have internal predecessors, (20597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:42,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:42,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-19 21:19:42,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:43,496 INFO L129 PetriNetUnfolder]: 0/871 cut-off events. [2022-07-19 21:19:43,496 INFO L130 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2022-07-19 21:19:43,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 871 events. 0/871 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2445 event pairs, 0 based on Foata normal form. 8/879 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-19 21:19:43,498 INFO L132 encePairwiseOnDemand]: 757/763 looper letters, 55 selfloop transitions, 45 changer transitions 0/692 dead transitions. [2022-07-19 21:19:43,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 692 transitions, 2047 flow [2022-07-19 21:19:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 27243 transitions. [2022-07-19 21:19:43,509 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934469200524247 [2022-07-19 21:19:43,509 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 27243 transitions. [2022-07-19 21:19:43,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 27243 transitions. [2022-07-19 21:19:43,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:43,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 27243 transitions. [2022-07-19 21:19:43,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 605.4) internal successors, (27243), 45 states have internal predecessors, (27243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:43,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 763.0) internal successors, (35098), 46 states have internal predecessors, (35098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:43,553 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 763.0) internal successors, (35098), 46 states have internal predecessors, (35098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:43,554 INFO L186 Difference]: Start difference. First operand has 702 places, 641 transitions, 1531 flow. Second operand 45 states and 27243 transitions. [2022-07-19 21:19:43,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 692 transitions, 2047 flow [2022-07-19 21:19:43,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 692 transitions, 2007 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:43,562 INFO L242 Difference]: Finished difference. Result has 749 places, 666 transitions, 1809 flow [2022-07-19 21:19:43,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1809, PETRI_PLACES=749, PETRI_TRANSITIONS=666} [2022-07-19 21:19:43,563 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 73 predicate places. [2022-07-19 21:19:43,563 INFO L495 AbstractCegarLoop]: Abstraction has has 749 places, 666 transitions, 1809 flow [2022-07-19 21:19:43,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 605.7941176470588) internal successors, (20597), 34 states have internal predecessors, (20597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:43,566 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:43,567 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:43,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-07-19 21:19:43,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-07-19 21:19:43,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash -882061865, now seen corresponding path program 1 times [2022-07-19 21:19:43,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:43,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271994710] [2022-07-19 21:19:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:43,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:43,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:43,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271994710] [2022-07-19 21:19:43,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271994710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:43,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554027004] [2022-07-19 21:19:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:43,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:43,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:43,992 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:43,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-19 21:19:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:44,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:44,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:44,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:45,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554027004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:45,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:45,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:45,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067705285] [2022-07-19 21:19:45,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:45,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:45,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:45,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:45,019 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-19 21:19:45,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 666 transitions, 1809 flow. Second operand has 66 states, 66 states have (on average 605.8939393939394) internal successors, (39989), 66 states have internal predecessors, (39989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:45,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:45,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-19 21:19:45,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:45,872 INFO L129 PetriNetUnfolder]: 0/794 cut-off events. [2022-07-19 21:19:45,872 INFO L130 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2022-07-19 21:19:45,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 794 events. 0/794 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1953 event pairs, 0 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2022-07-19 21:19:45,874 INFO L132 encePairwiseOnDemand]: 758/763 looper letters, 66 selfloop transitions, 64 changer transitions 0/712 dead transitions. [2022-07-19 21:19:45,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 712 transitions, 2427 flow [2022-07-19 21:19:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-19 21:19:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-19 21:19:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 39935 transitions. [2022-07-19 21:19:45,890 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930219627467334 [2022-07-19 21:19:45,891 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 39935 transitions. [2022-07-19 21:19:45,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 39935 transitions. [2022-07-19 21:19:45,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:45,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 39935 transitions. [2022-07-19 21:19:45,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 605.0757575757576) internal successors, (39935), 66 states have internal predecessors, (39935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:45,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 763.0) internal successors, (51121), 67 states have internal predecessors, (51121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:45,954 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 763.0) internal successors, (51121), 67 states have internal predecessors, (51121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:45,954 INFO L186 Difference]: Start difference. First operand has 749 places, 666 transitions, 1809 flow. Second operand 66 states and 39935 transitions. [2022-07-19 21:19:45,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 712 transitions, 2427 flow [2022-07-19 21:19:45,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 712 transitions, 2250 flow, removed 16 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:45,966 INFO L242 Difference]: Finished difference. Result has 770 places, 673 transitions, 1911 flow [2022-07-19 21:19:45,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1911, PETRI_PLACES=770, PETRI_TRANSITIONS=673} [2022-07-19 21:19:45,967 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 94 predicate places. [2022-07-19 21:19:45,967 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 673 transitions, 1911 flow [2022-07-19 21:19:45,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 605.8939393939394) internal successors, (39989), 66 states have internal predecessors, (39989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:45,971 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:45,971 INFO L200 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:45,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:46,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-07-19 21:19:46,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:46,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1428775408, now seen corresponding path program 1 times [2022-07-19 21:19:46,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:46,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286752469] [2022-07-19 21:19:46,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:46,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:46,247 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:46,313 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:46,313 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:46,314 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:46,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:46,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-07-19 21:19:46,314 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:46,314 WARN L231 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:46,314 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2022-07-19 21:19:46,351 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:46,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 705 places, 796 transitions, 2164 flow [2022-07-19 21:19:46,806 INFO L129 PetriNetUnfolder]: 224/1583 cut-off events. [2022-07-19 21:19:46,807 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-19 21:19:46,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 1583 events. 224/1583 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5794 event pairs, 0 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 1781. Up to 46 conditions per place. [2022-07-19 21:19:46,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 705 places, 796 transitions, 2164 flow [2022-07-19 21:19:46,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 705 places, 796 transitions, 2164 flow [2022-07-19 21:19:46,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:46,932 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:19:46,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:46,935 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2022-07-19 21:19:46,935 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:46,935 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:46,935 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] [2022-07-19 21:19:46,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash 755260066, now seen corresponding path program 1 times [2022-07-19 21:19:46,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:46,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055960171] [2022-07-19 21:19:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:46,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:46,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055960171] [2022-07-19 21:19:46,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055960171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:46,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:46,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:46,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044505603] [2022-07-19 21:19:46,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:46,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:46,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:46,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:46,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:46,953 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 630 out of 796 [2022-07-19 21:19:46,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 796 transitions, 2164 flow. Second operand has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:46,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:46,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 630 of 796 [2022-07-19 21:19:46,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:47,440 INFO L129 PetriNetUnfolder]: 0/1314 cut-off events. [2022-07-19 21:19:47,441 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-19 21:19:47,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1771 conditions, 1314 events. 0/1314 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5322 event pairs, 0 based on Foata normal form. 8318/9588 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2022-07-19 21:19:47,443 INFO L132 encePairwiseOnDemand]: 657/796 looper letters, 31 selfloop transitions, 2 changer transitions 11/663 dead transitions. [2022-07-19 21:19:47,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 663 transitions, 1964 flow [2022-07-19 21:19:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2067 transitions. [2022-07-19 21:19:47,445 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8655778894472361 [2022-07-19 21:19:47,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2067 transitions. [2022-07-19 21:19:47,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2067 transitions. [2022-07-19 21:19:47,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:47,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2067 transitions. [2022-07-19 21:19:47,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 689.0) internal successors, (2067), 3 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:47,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:47,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:47,448 INFO L186 Difference]: Start difference. First operand has 705 places, 796 transitions, 2164 flow. Second operand 3 states and 2067 transitions. [2022-07-19 21:19:47,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 663 transitions, 1964 flow [2022-07-19 21:19:47,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 663 transitions, 1502 flow, removed 231 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:47,456 INFO L242 Difference]: Finished difference. Result has 707 places, 649 transitions, 1418 flow [2022-07-19 21:19:47,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1418, PETRI_PLACES=707, PETRI_TRANSITIONS=649} [2022-07-19 21:19:47,457 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 2 predicate places. [2022-07-19 21:19:47,457 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 649 transitions, 1418 flow [2022-07-19 21:19:47,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:47,458 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:47,458 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] [2022-07-19 21:19:47,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-07-19 21:19:47,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:47,458 INFO L85 PathProgramCache]: Analyzing trace with hash 898973686, now seen corresponding path program 1 times [2022-07-19 21:19:47,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:47,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579836770] [2022-07-19 21:19:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:47,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:47,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:47,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579836770] [2022-07-19 21:19:47,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579836770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:47,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457302347] [2022-07-19 21:19:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:47,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:47,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:47,481 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:47,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-19 21:19:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:47,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:47,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:47,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457302347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:47,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:47,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:47,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222345196] [2022-07-19 21:19:47,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:47,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:47,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:47,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:47,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:47,991 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-19 21:19:47,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 649 transitions, 1418 flow. Second operand has 10 states, 10 states have (on average 631.3) internal successors, (6313), 10 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:47,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:47,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-19 21:19:47,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:48,429 INFO L129 PetriNetUnfolder]: 0/1050 cut-off events. [2022-07-19 21:19:48,430 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-19 21:19:48,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1342 conditions, 1050 events. 0/1050 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3492 event pairs, 0 based on Foata normal form. 2/1052 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-19 21:19:48,432 INFO L132 encePairwiseOnDemand]: 790/796 looper letters, 32 selfloop transitions, 9 changer transitions 0/659 dead transitions. [2022-07-19 21:19:48,432 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 659 transitions, 1522 flow [2022-07-19 21:19:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5704 transitions. [2022-07-19 21:19:48,435 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7962032384142937 [2022-07-19 21:19:48,435 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5704 transitions. [2022-07-19 21:19:48,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5704 transitions. [2022-07-19 21:19:48,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:48,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5704 transitions. [2022-07-19 21:19:48,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 633.7777777777778) internal successors, (5704), 9 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:48,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 796.0) internal successors, (7960), 10 states have internal predecessors, (7960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:48,444 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 796.0) internal successors, (7960), 10 states have internal predecessors, (7960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:48,444 INFO L186 Difference]: Start difference. First operand has 707 places, 649 transitions, 1418 flow. Second operand 9 states and 5704 transitions. [2022-07-19 21:19:48,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 659 transitions, 1522 flow [2022-07-19 21:19:48,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 659 transitions, 1520 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:48,451 INFO L242 Difference]: Finished difference. Result has 706 places, 655 transitions, 1466 flow [2022-07-19 21:19:48,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1466, PETRI_PLACES=706, PETRI_TRANSITIONS=655} [2022-07-19 21:19:48,451 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 1 predicate places. [2022-07-19 21:19:48,451 INFO L495 AbstractCegarLoop]: Abstraction has has 706 places, 655 transitions, 1466 flow [2022-07-19 21:19:48,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 631.3) internal successors, (6313), 10 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:48,452 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:48,452 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] [2022-07-19 21:19:48,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-19 21:19:48,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-07-19 21:19:48,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash 706235489, now seen corresponding path program 1 times [2022-07-19 21:19:48,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:48,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750469771] [2022-07-19 21:19:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:48,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:48,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750469771] [2022-07-19 21:19:48,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750469771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262614287] [2022-07-19 21:19:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:48,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:48,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:48,724 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:48,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-19 21:19:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:49,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:49,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:49,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:49,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262614287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:49,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:49,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:49,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469784907] [2022-07-19 21:19:49,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:49,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:49,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:49,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:49,266 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-19 21:19:49,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 706 places, 655 transitions, 1466 flow. Second operand has 18 states, 18 states have (on average 631.6111111111111) internal successors, (11369), 18 states have internal predecessors, (11369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:49,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:49,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-19 21:19:49,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:49,824 INFO L129 PetriNetUnfolder]: 0/1006 cut-off events. [2022-07-19 21:19:49,825 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-07-19 21:19:49,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 1006 events. 0/1006 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3184 event pairs, 0 based on Foata normal form. 4/1010 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-19 21:19:49,827 INFO L132 encePairwiseOnDemand]: 790/796 looper letters, 40 selfloop transitions, 21 changer transitions 0/679 dead transitions. [2022-07-19 21:19:49,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 679 transitions, 1696 flow [2022-07-19 21:19:49,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13274 transitions. [2022-07-19 21:19:49,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940894950945202 [2022-07-19 21:19:49,833 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13274 transitions. [2022-07-19 21:19:49,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13274 transitions. [2022-07-19 21:19:49,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:49,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13274 transitions. [2022-07-19 21:19:49,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 632.0952380952381) internal successors, (13274), 21 states have internal predecessors, (13274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:49,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 796.0) internal successors, (17512), 22 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:49,849 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 796.0) internal successors, (17512), 22 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:49,850 INFO L186 Difference]: Start difference. First operand has 706 places, 655 transitions, 1466 flow. Second operand 21 states and 13274 transitions. [2022-07-19 21:19:49,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 679 transitions, 1696 flow [2022-07-19 21:19:49,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 679 transitions, 1682 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:49,858 INFO L242 Difference]: Finished difference. Result has 730 places, 668 transitions, 1590 flow [2022-07-19 21:19:49,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1590, PETRI_PLACES=730, PETRI_TRANSITIONS=668} [2022-07-19 21:19:49,858 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 25 predicate places. [2022-07-19 21:19:49,858 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 668 transitions, 1590 flow [2022-07-19 21:19:49,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 631.6111111111111) internal successors, (11369), 18 states have internal predecessors, (11369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:49,859 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:49,860 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] [2022-07-19 21:19:49,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:50,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:50,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1489721021, now seen corresponding path program 1 times [2022-07-19 21:19:50,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:50,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085758422] [2022-07-19 21:19:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:50,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:50,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:50,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085758422] [2022-07-19 21:19:50,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085758422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:50,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289738675] [2022-07-19 21:19:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:50,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:50,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:50,182 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:50,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-19 21:19:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:50,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:50,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289738675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:50,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:50,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:19:50,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313794959] [2022-07-19 21:19:50,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:50,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:19:50,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:50,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:19:50,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:19:50,898 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-19 21:19:50,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 668 transitions, 1590 flow. Second operand has 34 states, 34 states have (on average 631.7941176470588) internal successors, (21481), 34 states have internal predecessors, (21481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:50,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:50,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-19 21:19:50,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:51,768 INFO L129 PetriNetUnfolder]: 0/918 cut-off events. [2022-07-19 21:19:51,768 INFO L130 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-07-19 21:19:51,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 918 events. 0/918 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2606 event pairs, 0 based on Foata normal form. 8/926 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2022-07-19 21:19:51,770 INFO L132 encePairwiseOnDemand]: 790/796 looper letters, 56 selfloop transitions, 45 changer transitions 0/719 dead transitions. [2022-07-19 21:19:51,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 719 transitions, 2108 flow [2022-07-19 21:19:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:19:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:19:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 28414 transitions. [2022-07-19 21:19:51,782 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932439977666108 [2022-07-19 21:19:51,783 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 28414 transitions. [2022-07-19 21:19:51,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 28414 transitions. [2022-07-19 21:19:51,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:51,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 28414 transitions. [2022-07-19 21:19:51,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 631.4222222222222) internal successors, (28414), 45 states have internal predecessors, (28414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:51,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 796.0) internal successors, (36616), 46 states have internal predecessors, (36616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:51,827 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 796.0) internal successors, (36616), 46 states have internal predecessors, (36616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:51,828 INFO L186 Difference]: Start difference. First operand has 730 places, 668 transitions, 1590 flow. Second operand 45 states and 28414 transitions. [2022-07-19 21:19:51,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 719 transitions, 2108 flow [2022-07-19 21:19:51,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 719 transitions, 2068 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:51,837 INFO L242 Difference]: Finished difference. Result has 777 places, 693 transitions, 1868 flow [2022-07-19 21:19:51,837 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1868, PETRI_PLACES=777, PETRI_TRANSITIONS=693} [2022-07-19 21:19:51,838 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 72 predicate places. [2022-07-19 21:19:51,838 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 693 transitions, 1868 flow [2022-07-19 21:19:51,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 631.7941176470588) internal successors, (21481), 34 states have internal predecessors, (21481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:51,840 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:51,840 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:51,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:52,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-07-19 21:19:52,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1813980361, now seen corresponding path program 1 times [2022-07-19 21:19:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:52,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852223831] [2022-07-19 21:19:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:52,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:52,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:52,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852223831] [2022-07-19 21:19:52,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852223831] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:52,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493293421] [2022-07-19 21:19:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:52,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:52,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:52,331 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:52,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-19 21:19:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:52,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:19:52,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:52,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:53,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493293421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:53,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:53,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:19:53,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149474980] [2022-07-19 21:19:53,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:53,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:19:53,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:53,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:19:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:19:53,700 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-19 21:19:53,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 693 transitions, 1868 flow. Second operand has 66 states, 66 states have (on average 631.8939393939394) internal successors, (41705), 66 states have internal predecessors, (41705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:53,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:53,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-19 21:19:53,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:55,044 INFO L129 PetriNetUnfolder]: 0/830 cut-off events. [2022-07-19 21:19:55,045 INFO L130 PetriNetUnfolder]: For 1135/1135 co-relation queries the response was YES. [2022-07-19 21:19:55,045 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 830 events. 0/830 cut-off events. For 1135/1135 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2051 event pairs, 0 based on Foata normal form. 8/838 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2022-07-19 21:19:55,046 INFO L132 encePairwiseOnDemand]: 791/796 looper letters, 69 selfloop transitions, 67 changer transitions 0/744 dead transitions. [2022-07-19 21:19:55,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 744 transitions, 2542 flow [2022-07-19 21:19:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-19 21:19:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-19 21:19:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 43545 transitions. [2022-07-19 21:19:55,073 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928228097006773 [2022-07-19 21:19:55,073 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 43545 transitions. [2022-07-19 21:19:55,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 43545 transitions. [2022-07-19 21:19:55,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:55,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 43545 transitions. [2022-07-19 21:19:55,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 631.0869565217391) internal successors, (43545), 69 states have internal predecessors, (43545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:55,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 796.0) internal successors, (55720), 70 states have internal predecessors, (55720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:55,161 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 796.0) internal successors, (55720), 70 states have internal predecessors, (55720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:55,162 INFO L186 Difference]: Start difference. First operand has 777 places, 693 transitions, 1868 flow. Second operand 69 states and 43545 transitions. [2022-07-19 21:19:55,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 744 transitions, 2542 flow [2022-07-19 21:19:55,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 744 transitions, 2357 flow, removed 17 selfloop flow, removed 33 redundant places. [2022-07-19 21:19:55,172 INFO L242 Difference]: Finished difference. Result has 801 places, 703 transitions, 1999 flow [2022-07-19 21:19:55,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1999, PETRI_PLACES=801, PETRI_TRANSITIONS=703} [2022-07-19 21:19:55,172 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 96 predicate places. [2022-07-19 21:19:55,172 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 703 transitions, 1999 flow [2022-07-19 21:19:55,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 631.8939393939394) internal successors, (41705), 66 states have internal predecessors, (41705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:55,177 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:55,177 INFO L200 CegarLoopForPetriNet]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:55,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-07-19 21:19:55,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-07-19 21:19:55,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash -780882567, now seen corresponding path program 1 times [2022-07-19 21:19:55,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:55,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457424934] [2022-07-19 21:19:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:55,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:55,426 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:55,470 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:55,471 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:55,471 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:55,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:55,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-07-19 21:19:55,471 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:19:55,472 WARN L231 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:55,472 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2022-07-19 21:19:55,514 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:19:55,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 734 places, 829 transitions, 2279 flow [2022-07-19 21:19:56,042 INFO L129 PetriNetUnfolder]: 234/1652 cut-off events. [2022-07-19 21:19:56,043 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-19 21:19:56,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 1652 events. 234/1652 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6067 event pairs, 0 based on Foata normal form. 0/1370 useless extension candidates. Maximal degree in co-relation 1875. Up to 48 conditions per place. [2022-07-19 21:19:56,138 INFO L82 GeneralOperation]: Start removeDead. Operand has 734 places, 829 transitions, 2279 flow [2022-07-19 21:19:56,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 734 places, 829 transitions, 2279 flow [2022-07-19 21:19:56,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:56,179 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:19:56,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:56,182 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-19 21:19:56,182 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:56,182 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:56,183 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] [2022-07-19 21:19:56,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1860539806, now seen corresponding path program 1 times [2022-07-19 21:19:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:56,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209690905] [2022-07-19 21:19:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:56,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:56,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:56,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209690905] [2022-07-19 21:19:56,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209690905] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:56,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:56,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:56,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835466539] [2022-07-19 21:19:56,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:56,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:56,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:56,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:56,201 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 656 out of 829 [2022-07-19 21:19:56,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 829 transitions, 2279 flow. Second operand has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:56,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:56,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 656 of 829 [2022-07-19 21:19:56,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:56,844 INFO L129 PetriNetUnfolder]: 0/1372 cut-off events. [2022-07-19 21:19:56,844 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-19 21:19:56,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 1372 events. 0/1372 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5536 event pairs, 0 based on Foata normal form. 9110/10436 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2022-07-19 21:19:56,846 INFO L132 encePairwiseOnDemand]: 684/829 looper letters, 32 selfloop transitions, 2 changer transitions 11/690 dead transitions. [2022-07-19 21:19:56,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 690 transitions, 2069 flow [2022-07-19 21:19:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2152 transitions. [2022-07-19 21:19:56,848 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8652995577000402 [2022-07-19 21:19:56,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2152 transitions. [2022-07-19 21:19:56,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2152 transitions. [2022-07-19 21:19:56,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:56,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2152 transitions. [2022-07-19 21:19:56,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 717.3333333333334) internal successors, (2152), 3 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:56,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 829.0) internal successors, (3316), 4 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:56,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 829.0) internal successors, (3316), 4 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:56,852 INFO L186 Difference]: Start difference. First operand has 734 places, 829 transitions, 2279 flow. Second operand 3 states and 2152 transitions. [2022-07-19 21:19:56,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 690 transitions, 2069 flow [2022-07-19 21:19:56,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 690 transitions, 1563 flow, removed 253 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:56,860 INFO L242 Difference]: Finished difference. Result has 736 places, 676 transitions, 1477 flow [2022-07-19 21:19:56,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1477, PETRI_PLACES=736, PETRI_TRANSITIONS=676} [2022-07-19 21:19:56,861 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 2 predicate places. [2022-07-19 21:19:56,861 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 676 transitions, 1477 flow [2022-07-19 21:19:56,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:56,862 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:56,862 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] [2022-07-19 21:19:56,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-07-19 21:19:56,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:56,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1202039306, now seen corresponding path program 1 times [2022-07-19 21:19:56,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:56,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609068288] [2022-07-19 21:19:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:56,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:56,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:56,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609068288] [2022-07-19 21:19:56,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609068288] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:56,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951730845] [2022-07-19 21:19:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:56,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:56,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:56,886 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:56,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-19 21:19:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:57,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:57,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:57,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951730845] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:57,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:57,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:57,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359145457] [2022-07-19 21:19:57,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:57,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:57,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:57,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:57,390 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-19 21:19:57,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 676 transitions, 1477 flow. Second operand has 10 states, 10 states have (on average 657.3) internal successors, (6573), 10 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:57,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:57,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-19 21:19:57,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:57,901 INFO L129 PetriNetUnfolder]: 0/1097 cut-off events. [2022-07-19 21:19:57,901 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-07-19 21:19:57,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 1097 events. 0/1097 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3642 event pairs, 0 based on Foata normal form. 2/1099 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-19 21:19:57,904 INFO L132 encePairwiseOnDemand]: 823/829 looper letters, 33 selfloop transitions, 9 changer transitions 0/686 dead transitions. [2022-07-19 21:19:57,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 686 transitions, 1583 flow [2022-07-19 21:19:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5939 transitions. [2022-07-19 21:19:57,907 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7960058973327973 [2022-07-19 21:19:57,907 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5939 transitions. [2022-07-19 21:19:57,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5939 transitions. [2022-07-19 21:19:57,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:57,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5939 transitions. [2022-07-19 21:19:57,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 659.8888888888889) internal successors, (5939), 9 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:57,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 829.0) internal successors, (8290), 10 states have internal predecessors, (8290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:57,915 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 829.0) internal successors, (8290), 10 states have internal predecessors, (8290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:57,915 INFO L186 Difference]: Start difference. First operand has 736 places, 676 transitions, 1477 flow. Second operand 9 states and 5939 transitions. [2022-07-19 21:19:57,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 686 transitions, 1583 flow [2022-07-19 21:19:57,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 686 transitions, 1581 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:57,922 INFO L242 Difference]: Finished difference. Result has 735 places, 682 transitions, 1525 flow [2022-07-19 21:19:57,923 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1525, PETRI_PLACES=735, PETRI_TRANSITIONS=682} [2022-07-19 21:19:57,923 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 1 predicate places. [2022-07-19 21:19:57,923 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 682 transitions, 1525 flow [2022-07-19 21:19:57,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 657.3) internal successors, (6573), 10 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:57,924 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:57,924 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:57,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-07-19 21:19:58,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-07-19 21:19:58,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:58,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1084817695, now seen corresponding path program 1 times [2022-07-19 21:19:58,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:58,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387108733] [2022-07-19 21:19:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:58,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:58,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:58,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387108733] [2022-07-19 21:19:58,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387108733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:58,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284127777] [2022-07-19 21:19:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:58,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:58,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:58,187 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:58,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-19 21:19:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:58,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:58,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:58,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284127777] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:58,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:58,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:58,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85935740] [2022-07-19 21:19:58,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:58,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:58,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:58,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:58,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:58,769 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-19 21:19:58,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 682 transitions, 1525 flow. Second operand has 18 states, 18 states have (on average 657.6111111111111) internal successors, (11837), 18 states have internal predecessors, (11837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:58,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:58,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-19 21:19:58,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:59,348 INFO L129 PetriNetUnfolder]: 0/1053 cut-off events. [2022-07-19 21:19:59,349 INFO L130 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-07-19 21:19:59,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 1053 events. 0/1053 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3371 event pairs, 0 based on Foata normal form. 4/1057 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-19 21:19:59,351 INFO L132 encePairwiseOnDemand]: 823/829 looper letters, 41 selfloop transitions, 21 changer transitions 0/706 dead transitions. [2022-07-19 21:19:59,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 706 transitions, 1757 flow [2022-07-19 21:19:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:59,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13821 transitions. [2022-07-19 21:19:59,357 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7938997070480786 [2022-07-19 21:19:59,357 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13821 transitions. [2022-07-19 21:19:59,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13821 transitions. [2022-07-19 21:19:59,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:59,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13821 transitions. [2022-07-19 21:19:59,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 658.1428571428571) internal successors, (13821), 21 states have internal predecessors, (13821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:59,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 829.0) internal successors, (18238), 22 states have internal predecessors, (18238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:59,375 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 829.0) internal successors, (18238), 22 states have internal predecessors, (18238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:59,375 INFO L186 Difference]: Start difference. First operand has 735 places, 682 transitions, 1525 flow. Second operand 21 states and 13821 transitions. [2022-07-19 21:19:59,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 706 transitions, 1757 flow [2022-07-19 21:19:59,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 754 places, 706 transitions, 1743 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:59,384 INFO L242 Difference]: Finished difference. Result has 759 places, 695 transitions, 1649 flow [2022-07-19 21:19:59,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1649, PETRI_PLACES=759, PETRI_TRANSITIONS=695} [2022-07-19 21:19:59,384 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 25 predicate places. [2022-07-19 21:19:59,385 INFO L495 AbstractCegarLoop]: Abstraction has has 759 places, 695 transitions, 1649 flow [2022-07-19 21:19:59,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 657.6111111111111) internal successors, (11837), 18 states have internal predecessors, (11837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:59,386 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:59,386 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] [2022-07-19 21:19:59,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:59,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:59,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:59,604 INFO L85 PathProgramCache]: Analyzing trace with hash 709153987, now seen corresponding path program 1 times [2022-07-19 21:19:59,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:59,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380019655] [2022-07-19 21:19:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:59,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:59,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:59,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380019655] [2022-07-19 21:19:59,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380019655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:59,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340036767] [2022-07-19 21:19:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:59,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:59,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:59,694 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:59,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-19 21:20:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:00,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:00,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:00,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340036767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:00,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:00,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:00,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54250800] [2022-07-19 21:20:00,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:00,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:00,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:00,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:00,542 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-19 21:20:00,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 695 transitions, 1649 flow. Second operand has 34 states, 34 states have (on average 657.7941176470588) internal successors, (22365), 34 states have internal predecessors, (22365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:00,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:00,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-19 21:20:00,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:01,339 INFO L129 PetriNetUnfolder]: 0/965 cut-off events. [2022-07-19 21:20:01,339 INFO L130 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-07-19 21:20:01,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1550 conditions, 965 events. 0/965 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2778 event pairs, 0 based on Foata normal form. 8/973 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-19 21:20:01,341 INFO L132 encePairwiseOnDemand]: 823/829 looper letters, 57 selfloop transitions, 45 changer transitions 0/746 dead transitions. [2022-07-19 21:20:01,341 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 746 transitions, 2169 flow [2022-07-19 21:20:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 29585 transitions. [2022-07-19 21:20:01,355 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930572309341911 [2022-07-19 21:20:01,355 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 29585 transitions. [2022-07-19 21:20:01,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 29585 transitions. [2022-07-19 21:20:01,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:01,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 29585 transitions. [2022-07-19 21:20:01,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 657.4444444444445) internal successors, (29585), 45 states have internal predecessors, (29585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:01,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 829.0) internal successors, (38134), 46 states have internal predecessors, (38134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:01,401 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 829.0) internal successors, (38134), 46 states have internal predecessors, (38134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:01,401 INFO L186 Difference]: Start difference. First operand has 759 places, 695 transitions, 1649 flow. Second operand 45 states and 29585 transitions. [2022-07-19 21:20:01,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 746 transitions, 2169 flow [2022-07-19 21:20:01,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 746 transitions, 2129 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:01,412 INFO L242 Difference]: Finished difference. Result has 806 places, 720 transitions, 1927 flow [2022-07-19 21:20:01,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1927, PETRI_PLACES=806, PETRI_TRANSITIONS=720} [2022-07-19 21:20:01,412 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 72 predicate places. [2022-07-19 21:20:01,412 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 720 transitions, 1927 flow [2022-07-19 21:20:01,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 657.7941176470588) internal successors, (22365), 34 states have internal predecessors, (22365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:01,414 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:01,415 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:01,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-07-19 21:20:01,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-07-19 21:20:01,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:01,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1368193207, now seen corresponding path program 1 times [2022-07-19 21:20:01,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:01,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795996560] [2022-07-19 21:20:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:01,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:01,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:01,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795996560] [2022-07-19 21:20:01,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795996560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:01,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922557267] [2022-07-19 21:20:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:01,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:01,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:01,952 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:01,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-19 21:20:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:02,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:02,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:02,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:03,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922557267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:03,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:03,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:03,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990236661] [2022-07-19 21:20:03,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:03,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:03,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:03,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:03,200 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-19 21:20:03,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 720 transitions, 1927 flow. Second operand has 66 states, 66 states have (on average 657.8939393939394) internal successors, (43421), 66 states have internal predecessors, (43421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:03,213 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:03,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-19 21:20:03,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:04,342 INFO L129 PetriNetUnfolder]: 0/866 cut-off events. [2022-07-19 21:20:04,347 INFO L130 PetriNetUnfolder]: For 1256/1256 co-relation queries the response was YES. [2022-07-19 21:20:04,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 866 events. 0/866 cut-off events. For 1256/1256 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2149 event pairs, 0 based on Foata normal form. 9/875 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-19 21:20:04,349 INFO L132 encePairwiseOnDemand]: 824/829 looper letters, 72 selfloop transitions, 70 changer transitions 0/776 dead transitions. [2022-07-19 21:20:04,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 776 transitions, 2657 flow [2022-07-19 21:20:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-19 21:20:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-19 21:20:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 47311 transitions. [2022-07-19 21:20:04,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926383862752983 [2022-07-19 21:20:04,370 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 47311 transitions. [2022-07-19 21:20:04,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 47311 transitions. [2022-07-19 21:20:04,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:04,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 47311 transitions. [2022-07-19 21:20:04,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 657.0972222222222) internal successors, (47311), 72 states have internal predecessors, (47311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:04,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 829.0) internal successors, (60517), 73 states have internal predecessors, (60517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:04,448 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 829.0) internal successors, (60517), 73 states have internal predecessors, (60517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:04,448 INFO L186 Difference]: Start difference. First operand has 806 places, 720 transitions, 1927 flow. Second operand 72 states and 47311 transitions. [2022-07-19 21:20:04,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 776 transitions, 2657 flow [2022-07-19 21:20:04,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 776 transitions, 2464 flow, removed 18 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:04,464 INFO L242 Difference]: Finished difference. Result has 833 places, 733 transitions, 2087 flow [2022-07-19 21:20:04,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=829, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2087, PETRI_PLACES=833, PETRI_TRANSITIONS=733} [2022-07-19 21:20:04,465 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 99 predicate places. [2022-07-19 21:20:04,466 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 733 transitions, 2087 flow [2022-07-19 21:20:04,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 657.8939393939394) internal successors, (43421), 66 states have internal predecessors, (43421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:04,470 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:04,470 INFO L200 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:04,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-07-19 21:20:04,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:04,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash -136700829, now seen corresponding path program 1 times [2022-07-19 21:20:04,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:04,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343140488] [2022-07-19 21:20:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:04,712 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:04,753 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:04,754 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:04,754 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:04,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:04,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-07-19 21:20:04,754 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:20:04,755 WARN L231 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:04,755 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2022-07-19 21:20:04,793 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:04,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 763 places, 862 transitions, 2396 flow [2022-07-19 21:20:05,328 INFO L129 PetriNetUnfolder]: 244/1721 cut-off events. [2022-07-19 21:20:05,328 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-19 21:20:05,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 1721 events. 244/1721 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6344 event pairs, 0 based on Foata normal form. 0/1427 useless extension candidates. Maximal degree in co-relation 1970. Up to 50 conditions per place. [2022-07-19 21:20:05,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 763 places, 862 transitions, 2396 flow [2022-07-19 21:20:05,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 763 places, 862 transitions, 2396 flow [2022-07-19 21:20:05,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:05,484 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:20:05,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:05,487 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2022-07-19 21:20:05,487 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:05,487 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:05,487 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] [2022-07-19 21:20:05,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2052186910, now seen corresponding path program 1 times [2022-07-19 21:20:05,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:05,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850252790] [2022-07-19 21:20:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:05,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:05,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:05,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850252790] [2022-07-19 21:20:05,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850252790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:05,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:05,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:05,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199981816] [2022-07-19 21:20:05,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:05,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:05,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:05,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:05,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:05,510 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 682 out of 862 [2022-07-19 21:20:05,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 862 transitions, 2396 flow. Second operand has 3 states, 3 states have (on average 683.0) internal successors, (2049), 3 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:05,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:05,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 682 of 862 [2022-07-19 21:20:05,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:06,166 INFO L129 PetriNetUnfolder]: 0/1430 cut-off events. [2022-07-19 21:20:06,167 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-19 21:20:06,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1952 conditions, 1430 events. 0/1430 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5801 event pairs, 0 based on Foata normal form. 9937/11319 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2022-07-19 21:20:06,169 INFO L132 encePairwiseOnDemand]: 711/862 looper letters, 33 selfloop transitions, 2 changer transitions 11/717 dead transitions. [2022-07-19 21:20:06,169 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 717 transitions, 2176 flow [2022-07-19 21:20:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2237 transitions. [2022-07-19 21:20:06,172 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8650425367362722 [2022-07-19 21:20:06,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2237 transitions. [2022-07-19 21:20:06,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2237 transitions. [2022-07-19 21:20:06,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:06,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2237 transitions. [2022-07-19 21:20:06,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 745.6666666666666) internal successors, (2237), 3 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:06,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 862.0) internal successors, (3448), 4 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:06,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 862.0) internal successors, (3448), 4 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:06,176 INFO L186 Difference]: Start difference. First operand has 763 places, 862 transitions, 2396 flow. Second operand 3 states and 2237 transitions. [2022-07-19 21:20:06,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 717 transitions, 2176 flow [2022-07-19 21:20:06,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 717 transitions, 1624 flow, removed 276 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:06,185 INFO L242 Difference]: Finished difference. Result has 765 places, 703 transitions, 1536 flow [2022-07-19 21:20:06,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1536, PETRI_PLACES=765, PETRI_TRANSITIONS=703} [2022-07-19 21:20:06,186 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 2 predicate places. [2022-07-19 21:20:06,186 INFO L495 AbstractCegarLoop]: Abstraction has has 765 places, 703 transitions, 1536 flow [2022-07-19 21:20:06,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 683.0) internal successors, (2049), 3 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:06,186 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:06,186 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:06,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-07-19 21:20:06,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:06,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:06,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2110823594, now seen corresponding path program 1 times [2022-07-19 21:20:06,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:06,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625052795] [2022-07-19 21:20:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:06,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:06,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625052795] [2022-07-19 21:20:06,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625052795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:06,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461178226] [2022-07-19 21:20:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:06,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:06,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:06,210 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:06,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-19 21:20:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:06,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:06,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:06,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461178226] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:06,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:06,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:06,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811680899] [2022-07-19 21:20:06,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:06,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:06,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:06,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:06,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:06,767 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-19 21:20:06,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 703 transitions, 1536 flow. Second operand has 10 states, 10 states have (on average 683.3) internal successors, (6833), 10 states have internal predecessors, (6833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:06,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:06,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-19 21:20:06,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:07,295 INFO L129 PetriNetUnfolder]: 0/1144 cut-off events. [2022-07-19 21:20:07,295 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-19 21:20:07,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 1144 events. 0/1144 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3834 event pairs, 0 based on Foata normal form. 2/1146 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-19 21:20:07,298 INFO L132 encePairwiseOnDemand]: 856/862 looper letters, 34 selfloop transitions, 9 changer transitions 0/713 dead transitions. [2022-07-19 21:20:07,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 713 transitions, 1644 flow [2022-07-19 21:20:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6174 transitions. [2022-07-19 21:20:07,302 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7958236658932715 [2022-07-19 21:20:07,302 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6174 transitions. [2022-07-19 21:20:07,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6174 transitions. [2022-07-19 21:20:07,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:07,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6174 transitions. [2022-07-19 21:20:07,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 686.0) internal successors, (6174), 9 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:07,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 862.0) internal successors, (8620), 10 states have internal predecessors, (8620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:07,310 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 862.0) internal successors, (8620), 10 states have internal predecessors, (8620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:07,310 INFO L186 Difference]: Start difference. First operand has 765 places, 703 transitions, 1536 flow. Second operand 9 states and 6174 transitions. [2022-07-19 21:20:07,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 713 transitions, 1644 flow [2022-07-19 21:20:07,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 713 transitions, 1642 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:07,318 INFO L242 Difference]: Finished difference. Result has 764 places, 709 transitions, 1584 flow [2022-07-19 21:20:07,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1584, PETRI_PLACES=764, PETRI_TRANSITIONS=709} [2022-07-19 21:20:07,319 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 1 predicate places. [2022-07-19 21:20:07,320 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 709 transitions, 1584 flow [2022-07-19 21:20:07,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 683.3) internal successors, (6833), 10 states have internal predecessors, (6833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:07,320 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:07,320 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] [2022-07-19 21:20:07,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-07-19 21:20:07,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-07-19 21:20:07,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:07,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1492616703, now seen corresponding path program 1 times [2022-07-19 21:20:07,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:07,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065650360] [2022-07-19 21:20:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:07,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:07,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:07,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065650360] [2022-07-19 21:20:07,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065650360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:07,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32733233] [2022-07-19 21:20:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:07,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:07,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:07,584 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:07,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-19 21:20:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:08,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:08,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:08,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:08,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32733233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:08,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:08,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533340518] [2022-07-19 21:20:08,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:08,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:08,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:08,227 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-19 21:20:08,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 709 transitions, 1584 flow. Second operand has 18 states, 18 states have (on average 683.6111111111111) internal successors, (12305), 18 states have internal predecessors, (12305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:08,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:08,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-19 21:20:08,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:08,915 INFO L129 PetriNetUnfolder]: 0/1100 cut-off events. [2022-07-19 21:20:08,916 INFO L130 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-07-19 21:20:08,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 1100 events. 0/1100 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3542 event pairs, 0 based on Foata normal form. 4/1104 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-19 21:20:08,918 INFO L132 encePairwiseOnDemand]: 856/862 looper letters, 42 selfloop transitions, 21 changer transitions 0/733 dead transitions. [2022-07-19 21:20:08,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 733 transitions, 1818 flow [2022-07-19 21:20:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14368 transitions. [2022-07-19 21:20:08,986 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7937244503369794 [2022-07-19 21:20:08,987 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14368 transitions. [2022-07-19 21:20:08,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14368 transitions. [2022-07-19 21:20:08,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:08,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14368 transitions. [2022-07-19 21:20:09,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 684.1904761904761) internal successors, (14368), 21 states have internal predecessors, (14368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:09,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 862.0) internal successors, (18964), 22 states have internal predecessors, (18964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:09,013 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 862.0) internal successors, (18964), 22 states have internal predecessors, (18964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:09,014 INFO L186 Difference]: Start difference. First operand has 764 places, 709 transitions, 1584 flow. Second operand 21 states and 14368 transitions. [2022-07-19 21:20:09,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 733 transitions, 1818 flow [2022-07-19 21:20:09,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 783 places, 733 transitions, 1804 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:09,022 INFO L242 Difference]: Finished difference. Result has 788 places, 722 transitions, 1708 flow [2022-07-19 21:20:09,023 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1708, PETRI_PLACES=788, PETRI_TRANSITIONS=722} [2022-07-19 21:20:09,023 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 25 predicate places. [2022-07-19 21:20:09,023 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 722 transitions, 1708 flow [2022-07-19 21:20:09,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 683.6111111111111) internal successors, (12305), 18 states have internal predecessors, (12305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:09,024 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:09,025 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] [2022-07-19 21:20:09,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-07-19 21:20:09,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-07-19 21:20:09,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:09,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:09,244 INFO L85 PathProgramCache]: Analyzing trace with hash -111277213, now seen corresponding path program 1 times [2022-07-19 21:20:09,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:09,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388117538] [2022-07-19 21:20:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:09,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:09,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:09,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388117538] [2022-07-19 21:20:09,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388117538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:09,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274839307] [2022-07-19 21:20:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:09,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:09,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:09,360 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:09,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-19 21:20:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:09,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:09,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:09,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:10,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274839307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:10,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:10,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:10,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65656840] [2022-07-19 21:20:10,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:10,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:10,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:10,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:10,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:10,249 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-19 21:20:10,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 722 transitions, 1708 flow. Second operand has 34 states, 34 states have (on average 683.7941176470588) internal successors, (23249), 34 states have internal predecessors, (23249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:10,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:10,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-19 21:20:10,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:11,209 INFO L129 PetriNetUnfolder]: 0/1012 cut-off events. [2022-07-19 21:20:11,210 INFO L130 PetriNetUnfolder]: For 519/519 co-relation queries the response was YES. [2022-07-19 21:20:11,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 1012 events. 0/1012 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2958 event pairs, 0 based on Foata normal form. 8/1020 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2022-07-19 21:20:11,212 INFO L132 encePairwiseOnDemand]: 856/862 looper letters, 58 selfloop transitions, 45 changer transitions 0/773 dead transitions. [2022-07-19 21:20:11,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 773 transitions, 2230 flow [2022-07-19 21:20:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 30756 transitions. [2022-07-19 21:20:11,225 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928847641144625 [2022-07-19 21:20:11,226 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 30756 transitions. [2022-07-19 21:20:11,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 30756 transitions. [2022-07-19 21:20:11,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:11,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 30756 transitions. [2022-07-19 21:20:11,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 683.4666666666667) internal successors, (30756), 45 states have internal predecessors, (30756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:11,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 862.0) internal successors, (39652), 46 states have internal predecessors, (39652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:11,274 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 862.0) internal successors, (39652), 46 states have internal predecessors, (39652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:11,274 INFO L186 Difference]: Start difference. First operand has 788 places, 722 transitions, 1708 flow. Second operand 45 states and 30756 transitions. [2022-07-19 21:20:11,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 773 transitions, 2230 flow [2022-07-19 21:20:11,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 826 places, 773 transitions, 2190 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:11,286 INFO L242 Difference]: Finished difference. Result has 835 places, 747 transitions, 1986 flow [2022-07-19 21:20:11,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1986, PETRI_PLACES=835, PETRI_TRANSITIONS=747} [2022-07-19 21:20:11,287 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 72 predicate places. [2022-07-19 21:20:11,287 INFO L495 AbstractCegarLoop]: Abstraction has has 835 places, 747 transitions, 1986 flow [2022-07-19 21:20:11,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 683.7941176470588) internal successors, (23249), 34 states have internal predecessors, (23249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:11,289 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:11,289 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:11,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:11,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-07-19 21:20:11,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:11,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:11,510 INFO L85 PathProgramCache]: Analyzing trace with hash 74524247, now seen corresponding path program 1 times [2022-07-19 21:20:11,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:11,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263395473] [2022-07-19 21:20:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:11,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:11,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:11,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263395473] [2022-07-19 21:20:11,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263395473] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:11,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167271601] [2022-07-19 21:20:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:11,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:11,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:11,818 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:11,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-19 21:20:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:12,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:12,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:12,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:13,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167271601] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:13,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:13,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:13,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913521979] [2022-07-19 21:20:13,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:13,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:13,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:13,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:13,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:13,187 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-19 21:20:13,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 835 places, 747 transitions, 1986 flow. Second operand has 66 states, 66 states have (on average 683.8939393939394) internal successors, (45137), 66 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:13,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:13,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-19 21:20:13,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:14,571 INFO L129 PetriNetUnfolder]: 0/902 cut-off events. [2022-07-19 21:20:14,571 INFO L130 PetriNetUnfolder]: For 1377/1377 co-relation queries the response was YES. [2022-07-19 21:20:14,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 902 events. 0/902 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2247 event pairs, 0 based on Foata normal form. 10/912 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2022-07-19 21:20:14,573 INFO L132 encePairwiseOnDemand]: 857/862 looper letters, 75 selfloop transitions, 73 changer transitions 0/808 dead transitions. [2022-07-19 21:20:14,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 808 transitions, 2772 flow [2022-07-19 21:20:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-19 21:20:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-19 21:20:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 51233 transitions. [2022-07-19 21:20:14,595 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924671307037896 [2022-07-19 21:20:14,596 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 51233 transitions. [2022-07-19 21:20:14,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 51233 transitions. [2022-07-19 21:20:14,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:14,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 51233 transitions. [2022-07-19 21:20:14,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 683.1066666666667) internal successors, (51233), 75 states have internal predecessors, (51233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:14,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 862.0) internal successors, (65512), 76 states have internal predecessors, (65512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:14,677 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 862.0) internal successors, (65512), 76 states have internal predecessors, (65512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:14,678 INFO L186 Difference]: Start difference. First operand has 835 places, 747 transitions, 1986 flow. Second operand 75 states and 51233 transitions. [2022-07-19 21:20:14,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 808 transitions, 2772 flow [2022-07-19 21:20:14,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 865 places, 808 transitions, 2571 flow, removed 19 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:14,688 INFO L242 Difference]: Finished difference. Result has 865 places, 763 transitions, 2175 flow [2022-07-19 21:20:14,689 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=862, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=2175, PETRI_PLACES=865, PETRI_TRANSITIONS=763} [2022-07-19 21:20:14,689 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 102 predicate places. [2022-07-19 21:20:14,689 INFO L495 AbstractCegarLoop]: Abstraction has has 865 places, 763 transitions, 2175 flow [2022-07-19 21:20:14,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 683.8939393939394) internal successors, (45137), 66 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:14,694 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:14,694 INFO L200 CegarLoopForPetriNet]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:14,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:14,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:14,907 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 488055662, now seen corresponding path program 1 times [2022-07-19 21:20:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:14,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541440759] [2022-07-19 21:20:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:14,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:14,942 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:15,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:15,036 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:15,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:15,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:15,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-07-19 21:20:15,038 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:20:15,038 WARN L231 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:15,038 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2022-07-19 21:20:15,080 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:15,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 792 places, 895 transitions, 2515 flow [2022-07-19 21:20:15,650 INFO L129 PetriNetUnfolder]: 254/1790 cut-off events. [2022-07-19 21:20:15,651 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-19 21:20:15,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2191 conditions, 1790 events. 254/1790 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6609 event pairs, 0 based on Foata normal form. 0/1484 useless extension candidates. Maximal degree in co-relation 2066. Up to 52 conditions per place. [2022-07-19 21:20:15,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 792 places, 895 transitions, 2515 flow [2022-07-19 21:20:15,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 792 places, 895 transitions, 2515 flow [2022-07-19 21:20:15,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:15,828 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:20:15,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:15,831 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-19 21:20:15,831 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:15,832 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:15,832 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:15,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:15,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:15,832 INFO L85 PathProgramCache]: Analyzing trace with hash 180318754, now seen corresponding path program 1 times [2022-07-19 21:20:15,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:15,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683021088] [2022-07-19 21:20:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:15,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:15,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:15,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683021088] [2022-07-19 21:20:15,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683021088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:15,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:15,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055681291] [2022-07-19 21:20:15,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:15,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:15,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:15,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:15,851 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 708 out of 895 [2022-07-19 21:20:15,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 895 transitions, 2515 flow. Second operand has 3 states, 3 states have (on average 709.0) internal successors, (2127), 3 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:15,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:15,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 708 of 895 [2022-07-19 21:20:15,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:16,492 INFO L129 PetriNetUnfolder]: 0/1488 cut-off events. [2022-07-19 21:20:16,493 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-19 21:20:16,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 1488 events. 0/1488 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6075 event pairs, 0 based on Foata normal form. 10799/12237 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2022-07-19 21:20:16,496 INFO L132 encePairwiseOnDemand]: 738/895 looper letters, 34 selfloop transitions, 2 changer transitions 11/744 dead transitions. [2022-07-19 21:20:16,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 744 transitions, 2285 flow [2022-07-19 21:20:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2322 transitions. [2022-07-19 21:20:16,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.864804469273743 [2022-07-19 21:20:16,498 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2322 transitions. [2022-07-19 21:20:16,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2322 transitions. [2022-07-19 21:20:16,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:16,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2322 transitions. [2022-07-19 21:20:16,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 774.0) internal successors, (2322), 3 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:16,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 895.0) internal successors, (3580), 4 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:16,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 895.0) internal successors, (3580), 4 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:16,501 INFO L186 Difference]: Start difference. First operand has 792 places, 895 transitions, 2515 flow. Second operand 3 states and 2322 transitions. [2022-07-19 21:20:16,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 744 transitions, 2285 flow [2022-07-19 21:20:16,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 744 transitions, 1685 flow, removed 300 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:16,512 INFO L242 Difference]: Finished difference. Result has 794 places, 730 transitions, 1595 flow [2022-07-19 21:20:16,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1595, PETRI_PLACES=794, PETRI_TRANSITIONS=730} [2022-07-19 21:20:16,513 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 2 predicate places. [2022-07-19 21:20:16,513 INFO L495 AbstractCegarLoop]: Abstraction has has 794 places, 730 transitions, 1595 flow [2022-07-19 21:20:16,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 709.0) internal successors, (2127), 3 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:16,513 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:16,513 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] [2022-07-19 21:20:16,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-07-19 21:20:16,514 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:16,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:16,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1827379178, now seen corresponding path program 1 times [2022-07-19 21:20:16,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:16,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369224139] [2022-07-19 21:20:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:16,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:16,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369224139] [2022-07-19 21:20:16,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369224139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134525001] [2022-07-19 21:20:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:16,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:16,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:16,558 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:16,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-19 21:20:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:17,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:17,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:17,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134525001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:17,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:17,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284620242] [2022-07-19 21:20:17,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:17,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:17,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:17,115 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-19 21:20:17,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 730 transitions, 1595 flow. Second operand has 10 states, 10 states have (on average 709.3) internal successors, (7093), 10 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:17,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:17,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-19 21:20:17,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:17,657 INFO L129 PetriNetUnfolder]: 0/1191 cut-off events. [2022-07-19 21:20:17,657 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-07-19 21:20:17,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1522 conditions, 1191 events. 0/1191 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3982 event pairs, 0 based on Foata normal form. 2/1193 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-07-19 21:20:17,659 INFO L132 encePairwiseOnDemand]: 889/895 looper letters, 35 selfloop transitions, 9 changer transitions 0/740 dead transitions. [2022-07-19 21:20:17,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 740 transitions, 1705 flow [2022-07-19 21:20:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6409 transitions. [2022-07-19 21:20:17,663 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956548727498448 [2022-07-19 21:20:17,663 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6409 transitions. [2022-07-19 21:20:17,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6409 transitions. [2022-07-19 21:20:17,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:17,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6409 transitions. [2022-07-19 21:20:17,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 712.1111111111111) internal successors, (6409), 9 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:17,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 895.0) internal successors, (8950), 10 states have internal predecessors, (8950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:17,671 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 895.0) internal successors, (8950), 10 states have internal predecessors, (8950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:17,671 INFO L186 Difference]: Start difference. First operand has 794 places, 730 transitions, 1595 flow. Second operand 9 states and 6409 transitions. [2022-07-19 21:20:17,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 740 transitions, 1705 flow [2022-07-19 21:20:17,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 790 places, 740 transitions, 1703 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:17,678 INFO L242 Difference]: Finished difference. Result has 793 places, 736 transitions, 1643 flow [2022-07-19 21:20:17,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1643, PETRI_PLACES=793, PETRI_TRANSITIONS=736} [2022-07-19 21:20:17,679 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 1 predicate places. [2022-07-19 21:20:17,679 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 736 transitions, 1643 flow [2022-07-19 21:20:17,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 709.3) internal successors, (7093), 10 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:17,680 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:17,680 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] [2022-07-19 21:20:17,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:17,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-07-19 21:20:17,883 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash -517161535, now seen corresponding path program 1 times [2022-07-19 21:20:17,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:17,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579325828] [2022-07-19 21:20:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:17,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:17,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:17,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579325828] [2022-07-19 21:20:17,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579325828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:17,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501031351] [2022-07-19 21:20:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:17,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:17,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:17,932 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:17,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-19 21:20:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:18,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:18,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:18,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501031351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:18,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:18,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:18,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690771842] [2022-07-19 21:20:18,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:18,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:18,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:18,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:18,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:18,593 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-19 21:20:18,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 736 transitions, 1643 flow. Second operand has 18 states, 18 states have (on average 709.6111111111111) internal successors, (12773), 18 states have internal predecessors, (12773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:18,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:18,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-19 21:20:18,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:19,255 INFO L129 PetriNetUnfolder]: 0/1147 cut-off events. [2022-07-19 21:20:19,255 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-07-19 21:20:19,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 1147 events. 0/1147 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3713 event pairs, 0 based on Foata normal form. 4/1151 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-19 21:20:19,258 INFO L132 encePairwiseOnDemand]: 889/895 looper letters, 43 selfloop transitions, 21 changer transitions 0/760 dead transitions. [2022-07-19 21:20:19,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 813 places, 760 transitions, 1879 flow [2022-07-19 21:20:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14915 transitions. [2022-07-19 21:20:19,265 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7935621175844639 [2022-07-19 21:20:19,265 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14915 transitions. [2022-07-19 21:20:19,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14915 transitions. [2022-07-19 21:20:19,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:19,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14915 transitions. [2022-07-19 21:20:19,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 710.2380952380952) internal successors, (14915), 21 states have internal predecessors, (14915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:19,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 895.0) internal successors, (19690), 22 states have internal predecessors, (19690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:19,283 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 895.0) internal successors, (19690), 22 states have internal predecessors, (19690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:19,283 INFO L186 Difference]: Start difference. First operand has 793 places, 736 transitions, 1643 flow. Second operand 21 states and 14915 transitions. [2022-07-19 21:20:19,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 813 places, 760 transitions, 1879 flow [2022-07-19 21:20:19,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 760 transitions, 1865 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:19,292 INFO L242 Difference]: Finished difference. Result has 817 places, 749 transitions, 1767 flow [2022-07-19 21:20:19,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1767, PETRI_PLACES=817, PETRI_TRANSITIONS=749} [2022-07-19 21:20:19,293 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 25 predicate places. [2022-07-19 21:20:19,293 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 749 transitions, 1767 flow [2022-07-19 21:20:19,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 709.6111111111111) internal successors, (12773), 18 states have internal predecessors, (12773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:19,294 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:19,294 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] [2022-07-19 21:20:19,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-07-19 21:20:19,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:19,497 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:19,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:19,497 INFO L85 PathProgramCache]: Analyzing trace with hash 343952675, now seen corresponding path program 1 times [2022-07-19 21:20:19,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:19,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599840346] [2022-07-19 21:20:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:19,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:19,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:19,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599840346] [2022-07-19 21:20:19,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599840346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:19,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101758005] [2022-07-19 21:20:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:19,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:19,609 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:19,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-19 21:20:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:20,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:20,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:20,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:20,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101758005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:20,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:20,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:20,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725645757] [2022-07-19 21:20:20,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:20,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:20,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:20,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:20,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:20,480 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-19 21:20:20,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 749 transitions, 1767 flow. Second operand has 34 states, 34 states have (on average 709.7941176470588) internal successors, (24133), 34 states have internal predecessors, (24133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:20,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:20,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-19 21:20:20,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:21,346 INFO L129 PetriNetUnfolder]: 0/1059 cut-off events. [2022-07-19 21:20:21,347 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-19 21:20:21,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 1059 events. 0/1059 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3118 event pairs, 0 based on Foata normal form. 8/1067 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-19 21:20:21,349 INFO L132 encePairwiseOnDemand]: 889/895 looper letters, 59 selfloop transitions, 45 changer transitions 0/800 dead transitions. [2022-07-19 21:20:21,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 861 places, 800 transitions, 2291 flow [2022-07-19 21:20:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 31927 transitions. [2022-07-19 21:20:21,366 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927250155183116 [2022-07-19 21:20:21,366 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 31927 transitions. [2022-07-19 21:20:21,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 31927 transitions. [2022-07-19 21:20:21,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:21,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 31927 transitions. [2022-07-19 21:20:21,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 709.4888888888889) internal successors, (31927), 45 states have internal predecessors, (31927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:21,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 895.0) internal successors, (41170), 46 states have internal predecessors, (41170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:21,420 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 895.0) internal successors, (41170), 46 states have internal predecessors, (41170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:21,420 INFO L186 Difference]: Start difference. First operand has 817 places, 749 transitions, 1767 flow. Second operand 45 states and 31927 transitions. [2022-07-19 21:20:21,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 861 places, 800 transitions, 2291 flow [2022-07-19 21:20:21,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 800 transitions, 2251 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:21,457 INFO L242 Difference]: Finished difference. Result has 864 places, 774 transitions, 2045 flow [2022-07-19 21:20:21,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2045, PETRI_PLACES=864, PETRI_TRANSITIONS=774} [2022-07-19 21:20:21,458 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 72 predicate places. [2022-07-19 21:20:21,458 INFO L495 AbstractCegarLoop]: Abstraction has has 864 places, 774 transitions, 2045 flow [2022-07-19 21:20:21,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 709.7941176470588) internal successors, (24133), 34 states have internal predecessors, (24133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:21,465 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:21,466 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:21,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:21,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:21,666 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1400019945, now seen corresponding path program 1 times [2022-07-19 21:20:21,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:21,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737535556] [2022-07-19 21:20:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:21,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:21,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737535556] [2022-07-19 21:20:21,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737535556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549370380] [2022-07-19 21:20:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:21,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:21,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:21,889 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:21,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-19 21:20:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:22,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:22,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:22,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:23,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549370380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:23,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:23,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:23,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702188170] [2022-07-19 21:20:23,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:23,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:23,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:23,426 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-19 21:20:23,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 774 transitions, 2045 flow. Second operand has 66 states, 66 states have (on average 709.8939393939394) internal successors, (46853), 66 states have internal predecessors, (46853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:23,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:23,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-19 21:20:23,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:24,678 INFO L129 PetriNetUnfolder]: 0/938 cut-off events. [2022-07-19 21:20:24,679 INFO L130 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2022-07-19 21:20:24,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 938 events. 0/938 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2345 event pairs, 0 based on Foata normal form. 11/949 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2022-07-19 21:20:24,680 INFO L132 encePairwiseOnDemand]: 890/895 looper letters, 78 selfloop transitions, 76 changer transitions 0/840 dead transitions. [2022-07-19 21:20:24,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 840 transitions, 2887 flow [2022-07-19 21:20:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-19 21:20:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-19 21:20:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 55311 transitions. [2022-07-19 21:20:24,705 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923076923076923 [2022-07-19 21:20:24,705 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 55311 transitions. [2022-07-19 21:20:24,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 55311 transitions. [2022-07-19 21:20:24,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:24,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 55311 transitions. [2022-07-19 21:20:24,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 709.1153846153846) internal successors, (55311), 78 states have internal predecessors, (55311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:24,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 895.0) internal successors, (70705), 79 states have internal predecessors, (70705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:24,797 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 895.0) internal successors, (70705), 79 states have internal predecessors, (70705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:24,797 INFO L186 Difference]: Start difference. First operand has 864 places, 774 transitions, 2045 flow. Second operand 78 states and 55311 transitions. [2022-07-19 21:20:24,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 840 transitions, 2887 flow [2022-07-19 21:20:24,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 840 transitions, 2678 flow, removed 20 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:24,811 INFO L242 Difference]: Finished difference. Result has 897 places, 793 transitions, 2263 flow [2022-07-19 21:20:24,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=895, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2263, PETRI_PLACES=897, PETRI_TRANSITIONS=793} [2022-07-19 21:20:24,812 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 105 predicate places. [2022-07-19 21:20:24,812 INFO L495 AbstractCegarLoop]: Abstraction has has 897 places, 793 transitions, 2263 flow [2022-07-19 21:20:24,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 709.8939393939394) internal successors, (46853), 66 states have internal predecessors, (46853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:24,816 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:24,816 INFO L200 CegarLoopForPetriNet]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:24,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:25,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:25,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:25,038 INFO L85 PathProgramCache]: Analyzing trace with hash -906765510, now seen corresponding path program 1 times [2022-07-19 21:20:25,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:25,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712397342] [2022-07-19 21:20:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:25,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:25,071 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:25,121 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:25,121 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:25,121 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:25,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:25,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-07-19 21:20:25,122 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:20:25,122 WARN L231 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:25,122 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2022-07-19 21:20:25,170 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:25,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 821 places, 928 transitions, 2636 flow [2022-07-19 21:20:25,777 INFO L129 PetriNetUnfolder]: 264/1859 cut-off events. [2022-07-19 21:20:25,778 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-19 21:20:25,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 1859 events. 264/1859 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6830 event pairs, 0 based on Foata normal form. 0/1541 useless extension candidates. Maximal degree in co-relation 2163. Up to 54 conditions per place. [2022-07-19 21:20:25,899 INFO L82 GeneralOperation]: Start removeDead. Operand has 821 places, 928 transitions, 2636 flow [2022-07-19 21:20:25,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 821 places, 928 transitions, 2636 flow [2022-07-19 21:20:25,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:25,954 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:20:25,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:25,957 INFO L129 PetriNetUnfolder]: 4/78 cut-off events. [2022-07-19 21:20:25,957 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:25,957 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:25,957 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] [2022-07-19 21:20:25,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:25,957 INFO L85 PathProgramCache]: Analyzing trace with hash 542009890, now seen corresponding path program 1 times [2022-07-19 21:20:25,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:25,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420432271] [2022-07-19 21:20:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:25,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:25,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:25,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420432271] [2022-07-19 21:20:25,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420432271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:25,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:25,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:25,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198173227] [2022-07-19 21:20:25,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:25,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:25,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:25,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:25,980 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 734 out of 928 [2022-07-19 21:20:25,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 928 transitions, 2636 flow. Second operand has 3 states, 3 states have (on average 735.0) internal successors, (2205), 3 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:25,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:25,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 734 of 928 [2022-07-19 21:20:25,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:26,670 INFO L129 PetriNetUnfolder]: 0/1546 cut-off events. [2022-07-19 21:20:26,671 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-19 21:20:26,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 1546 events. 0/1546 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6283 event pairs, 0 based on Foata normal form. 11698/13192 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2022-07-19 21:20:26,674 INFO L132 encePairwiseOnDemand]: 765/928 looper letters, 35 selfloop transitions, 2 changer transitions 11/771 dead transitions. [2022-07-19 21:20:26,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 771 transitions, 2396 flow [2022-07-19 21:20:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2407 transitions. [2022-07-19 21:20:26,675 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8645833333333334 [2022-07-19 21:20:26,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2407 transitions. [2022-07-19 21:20:26,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2407 transitions. [2022-07-19 21:20:26,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:26,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2407 transitions. [2022-07-19 21:20:26,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 802.3333333333334) internal successors, (2407), 3 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:26,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 928.0) internal successors, (3712), 4 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:26,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 928.0) internal successors, (3712), 4 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:26,679 INFO L186 Difference]: Start difference. First operand has 821 places, 928 transitions, 2636 flow. Second operand 3 states and 2407 transitions. [2022-07-19 21:20:26,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 771 transitions, 2396 flow [2022-07-19 21:20:26,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 822 places, 771 transitions, 1746 flow, removed 325 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:26,690 INFO L242 Difference]: Finished difference. Result has 823 places, 757 transitions, 1654 flow [2022-07-19 21:20:26,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1654, PETRI_PLACES=823, PETRI_TRANSITIONS=757} [2022-07-19 21:20:26,691 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 2 predicate places. [2022-07-19 21:20:26,691 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 757 transitions, 1654 flow [2022-07-19 21:20:26,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 735.0) internal successors, (2205), 3 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:26,691 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:26,691 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] [2022-07-19 21:20:26,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-07-19 21:20:26,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:26,692 INFO L85 PathProgramCache]: Analyzing trace with hash -351706058, now seen corresponding path program 1 times [2022-07-19 21:20:26,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:26,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174411494] [2022-07-19 21:20:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:26,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:26,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:26,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174411494] [2022-07-19 21:20:26,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174411494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:26,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716101911] [2022-07-19 21:20:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:26,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:26,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:26,715 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:26,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-19 21:20:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:27,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:27,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:27,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716101911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:27,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:27,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:27,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290031349] [2022-07-19 21:20:27,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:27,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:27,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:27,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:27,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:27,325 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-19 21:20:27,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 757 transitions, 1654 flow. Second operand has 10 states, 10 states have (on average 735.3) internal successors, (7353), 10 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:27,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:27,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-19 21:20:27,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:27,939 INFO L129 PetriNetUnfolder]: 0/1238 cut-off events. [2022-07-19 21:20:27,940 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-19 21:20:27,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1582 conditions, 1238 events. 0/1238 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4176 event pairs, 0 based on Foata normal form. 2/1240 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-07-19 21:20:27,942 INFO L132 encePairwiseOnDemand]: 922/928 looper letters, 36 selfloop transitions, 9 changer transitions 0/767 dead transitions. [2022-07-19 21:20:27,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 767 transitions, 1766 flow [2022-07-19 21:20:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6644 transitions. [2022-07-19 21:20:27,945 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954980842911877 [2022-07-19 21:20:27,946 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6644 transitions. [2022-07-19 21:20:27,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6644 transitions. [2022-07-19 21:20:27,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:27,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6644 transitions. [2022-07-19 21:20:27,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 738.2222222222222) internal successors, (6644), 9 states have internal predecessors, (6644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:27,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 928.0) internal successors, (9280), 10 states have internal predecessors, (9280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:27,956 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 928.0) internal successors, (9280), 10 states have internal predecessors, (9280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:27,956 INFO L186 Difference]: Start difference. First operand has 823 places, 757 transitions, 1654 flow. Second operand 9 states and 6644 transitions. [2022-07-19 21:20:27,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 767 transitions, 1766 flow [2022-07-19 21:20:27,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 767 transitions, 1764 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:27,964 INFO L242 Difference]: Finished difference. Result has 822 places, 763 transitions, 1702 flow [2022-07-19 21:20:27,964 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1702, PETRI_PLACES=822, PETRI_TRANSITIONS=763} [2022-07-19 21:20:27,964 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 1 predicate places. [2022-07-19 21:20:27,965 INFO L495 AbstractCegarLoop]: Abstraction has has 822 places, 763 transitions, 1702 flow [2022-07-19 21:20:27,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 735.3) internal successors, (7353), 10 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:27,965 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:27,965 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] [2022-07-19 21:20:27,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:28,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-07-19 21:20:28,179 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1841547809, now seen corresponding path program 1 times [2022-07-19 21:20:28,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:28,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622484020] [2022-07-19 21:20:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:28,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:28,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:28,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622484020] [2022-07-19 21:20:28,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622484020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:28,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906029213] [2022-07-19 21:20:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:28,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:28,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:28,228 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:28,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-19 21:20:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:28,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:28,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:28,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:28,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906029213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:28,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:28,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:28,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717268788] [2022-07-19 21:20:28,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:28,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:28,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:28,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:28,913 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-19 21:20:28,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 763 transitions, 1702 flow. Second operand has 18 states, 18 states have (on average 735.6111111111111) internal successors, (13241), 18 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:28,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:28,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-19 21:20:28,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:29,609 INFO L129 PetriNetUnfolder]: 0/1194 cut-off events. [2022-07-19 21:20:29,610 INFO L130 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-07-19 21:20:29,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1727 conditions, 1194 events. 0/1194 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3864 event pairs, 0 based on Foata normal form. 4/1198 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-19 21:20:29,612 INFO L132 encePairwiseOnDemand]: 922/928 looper letters, 44 selfloop transitions, 21 changer transitions 0/787 dead transitions. [2022-07-19 21:20:29,612 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 842 places, 787 transitions, 1940 flow [2022-07-19 21:20:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 15462 transitions. [2022-07-19 21:20:29,619 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934113300492611 [2022-07-19 21:20:29,619 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 15462 transitions. [2022-07-19 21:20:29,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 15462 transitions. [2022-07-19 21:20:29,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:29,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 15462 transitions. [2022-07-19 21:20:29,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 736.2857142857143) internal successors, (15462), 21 states have internal predecessors, (15462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:29,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 928.0) internal successors, (20416), 22 states have internal predecessors, (20416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:29,639 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 928.0) internal successors, (20416), 22 states have internal predecessors, (20416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:29,639 INFO L186 Difference]: Start difference. First operand has 822 places, 763 transitions, 1702 flow. Second operand 21 states and 15462 transitions. [2022-07-19 21:20:29,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 842 places, 787 transitions, 1940 flow [2022-07-19 21:20:29,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 787 transitions, 1926 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:29,649 INFO L242 Difference]: Finished difference. Result has 846 places, 776 transitions, 1826 flow [2022-07-19 21:20:29,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=821, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1826, PETRI_PLACES=846, PETRI_TRANSITIONS=776} [2022-07-19 21:20:29,650 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 25 predicate places. [2022-07-19 21:20:29,650 INFO L495 AbstractCegarLoop]: Abstraction has has 846 places, 776 transitions, 1826 flow [2022-07-19 21:20:29,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 735.6111111111111) internal successors, (13241), 18 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:29,651 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:29,651 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] [2022-07-19 21:20:29,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-07-19 21:20:29,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-07-19 21:20:29,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash 2074843651, now seen corresponding path program 1 times [2022-07-19 21:20:29,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:29,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663431416] [2022-07-19 21:20:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:29,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:29,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:29,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663431416] [2022-07-19 21:20:29,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663431416] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:29,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134099603] [2022-07-19 21:20:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:29,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:29,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:29,980 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:29,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-19 21:20:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:30,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:30,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:30,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:30,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134099603] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:30,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:30,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:30,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442562007] [2022-07-19 21:20:30,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:30,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:30,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:30,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:30,919 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-19 21:20:30,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 776 transitions, 1826 flow. Second operand has 34 states, 34 states have (on average 735.7941176470588) internal successors, (25017), 34 states have internal predecessors, (25017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:30,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:30,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-19 21:20:30,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:31,918 INFO L129 PetriNetUnfolder]: 0/1106 cut-off events. [2022-07-19 21:20:31,918 INFO L130 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-07-19 21:20:31,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1781 conditions, 1106 events. 0/1106 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3283 event pairs, 0 based on Foata normal form. 8/1114 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-19 21:20:31,920 INFO L132 encePairwiseOnDemand]: 922/928 looper letters, 60 selfloop transitions, 45 changer transitions 0/827 dead transitions. [2022-07-19 21:20:31,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 827 transitions, 2352 flow [2022-07-19 21:20:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 33098 transitions. [2022-07-19 21:20:31,935 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925766283524904 [2022-07-19 21:20:31,935 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 33098 transitions. [2022-07-19 21:20:31,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 33098 transitions. [2022-07-19 21:20:31,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:31,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 33098 transitions. [2022-07-19 21:20:31,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 735.5111111111111) internal successors, (33098), 45 states have internal predecessors, (33098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:31,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 928.0) internal successors, (42688), 46 states have internal predecessors, (42688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:31,987 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 928.0) internal successors, (42688), 46 states have internal predecessors, (42688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:31,987 INFO L186 Difference]: Start difference. First operand has 846 places, 776 transitions, 1826 flow. Second operand 45 states and 33098 transitions. [2022-07-19 21:20:31,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 890 places, 827 transitions, 2352 flow [2022-07-19 21:20:31,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 884 places, 827 transitions, 2312 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:31,998 INFO L242 Difference]: Finished difference. Result has 893 places, 801 transitions, 2104 flow [2022-07-19 21:20:31,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=840, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2104, PETRI_PLACES=893, PETRI_TRANSITIONS=801} [2022-07-19 21:20:31,999 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 72 predicate places. [2022-07-19 21:20:31,999 INFO L495 AbstractCegarLoop]: Abstraction has has 893 places, 801 transitions, 2104 flow [2022-07-19 21:20:32,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 735.7941176470588) internal successors, (25017), 34 states have internal predecessors, (25017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:32,002 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:32,002 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:32,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-07-19 21:20:32,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:32,215 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1239527927, now seen corresponding path program 1 times [2022-07-19 21:20:32,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:32,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433954217] [2022-07-19 21:20:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:32,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:32,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:32,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433954217] [2022-07-19 21:20:32,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433954217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:32,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099822114] [2022-07-19 21:20:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:32,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:32,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:32,520 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:32,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-19 21:20:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:33,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:33,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:33,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099822114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:33,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:33,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:33,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617436532] [2022-07-19 21:20:33,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:33,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:33,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:33,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:33,895 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-19 21:20:33,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 801 transitions, 2104 flow. Second operand has 66 states, 66 states have (on average 735.8939393939394) internal successors, (48569), 66 states have internal predecessors, (48569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:33,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:33,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-19 21:20:33,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:35,148 INFO L129 PetriNetUnfolder]: 0/974 cut-off events. [2022-07-19 21:20:35,149 INFO L130 PetriNetUnfolder]: For 1619/1619 co-relation queries the response was YES. [2022-07-19 21:20:35,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 974 events. 0/974 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2443 event pairs, 0 based on Foata normal form. 12/986 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-19 21:20:35,150 INFO L132 encePairwiseOnDemand]: 923/928 looper letters, 81 selfloop transitions, 79 changer transitions 0/872 dead transitions. [2022-07-19 21:20:35,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 872 transitions, 3002 flow [2022-07-19 21:20:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-19 21:20:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-19 21:20:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 59545 transitions. [2022-07-19 21:20:35,176 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921588974031503 [2022-07-19 21:20:35,177 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 59545 transitions. [2022-07-19 21:20:35,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 59545 transitions. [2022-07-19 21:20:35,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:35,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 59545 transitions. [2022-07-19 21:20:35,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 735.1234567901234) internal successors, (59545), 81 states have internal predecessors, (59545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:35,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 928.0) internal successors, (76096), 82 states have internal predecessors, (76096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:35,272 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 928.0) internal successors, (76096), 82 states have internal predecessors, (76096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:35,272 INFO L186 Difference]: Start difference. First operand has 893 places, 801 transitions, 2104 flow. Second operand 81 states and 59545 transitions. [2022-07-19 21:20:35,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 872 transitions, 3002 flow [2022-07-19 21:20:35,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 872 transitions, 2785 flow, removed 21 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:35,285 INFO L242 Difference]: Finished difference. Result has 929 places, 823 transitions, 2351 flow [2022-07-19 21:20:35,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2351, PETRI_PLACES=929, PETRI_TRANSITIONS=823} [2022-07-19 21:20:35,286 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 108 predicate places. [2022-07-19 21:20:35,286 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 823 transitions, 2351 flow [2022-07-19 21:20:35,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 735.8939393939394) internal successors, (48569), 66 states have internal predecessors, (48569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:35,290 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:35,290 INFO L200 CegarLoopForPetriNet]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:35,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:35,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:35,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1409301607, now seen corresponding path program 1 times [2022-07-19 21:20:35,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:35,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109796246] [2022-07-19 21:20:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:35,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:35,540 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:35,591 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:35,591 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:35,591 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:35,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-07-19 21:20:35,591 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:20:35,592 WARN L231 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:35,592 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2022-07-19 21:20:35,624 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:35,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 850 places, 961 transitions, 2759 flow [2022-07-19 21:20:36,299 INFO L129 PetriNetUnfolder]: 274/1928 cut-off events. [2022-07-19 21:20:36,300 INFO L130 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-07-19 21:20:36,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2388 conditions, 1928 events. 274/1928 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7047 event pairs, 0 based on Foata normal form. 0/1598 useless extension candidates. Maximal degree in co-relation 2261. Up to 56 conditions per place. [2022-07-19 21:20:36,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 850 places, 961 transitions, 2759 flow [2022-07-19 21:20:36,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 850 places, 961 transitions, 2759 flow [2022-07-19 21:20:36,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:36,490 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:20:36,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:36,493 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-19 21:20:36,493 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:36,493 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:36,493 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:36,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash -967113502, now seen corresponding path program 1 times [2022-07-19 21:20:36,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:36,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058047448] [2022-07-19 21:20:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:36,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:36,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:36,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058047448] [2022-07-19 21:20:36,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058047448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:36,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:36,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:36,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131602382] [2022-07-19 21:20:36,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:36,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:36,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:36,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:36,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:36,521 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 760 out of 961 [2022-07-19 21:20:36,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 961 transitions, 2759 flow. Second operand has 3 states, 3 states have (on average 761.0) internal successors, (2283), 3 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:36,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:36,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 760 of 961 [2022-07-19 21:20:36,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:37,268 INFO L129 PetriNetUnfolder]: 0/1604 cut-off events. [2022-07-19 21:20:37,268 INFO L130 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-07-19 21:20:37,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2231 conditions, 1604 events. 0/1604 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6535 event pairs, 0 based on Foata normal form. 12633/14183 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2022-07-19 21:20:37,271 INFO L132 encePairwiseOnDemand]: 792/961 looper letters, 36 selfloop transitions, 2 changer transitions 11/798 dead transitions. [2022-07-19 21:20:37,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 851 places, 798 transitions, 2509 flow [2022-07-19 21:20:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2492 transitions. [2022-07-19 21:20:37,273 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8643773846687478 [2022-07-19 21:20:37,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2492 transitions. [2022-07-19 21:20:37,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2492 transitions. [2022-07-19 21:20:37,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:37,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2492 transitions. [2022-07-19 21:20:37,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 830.6666666666666) internal successors, (2492), 3 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:37,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 961.0) internal successors, (3844), 4 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:37,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 961.0) internal successors, (3844), 4 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:37,277 INFO L186 Difference]: Start difference. First operand has 850 places, 961 transitions, 2759 flow. Second operand 3 states and 2492 transitions. [2022-07-19 21:20:37,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 851 places, 798 transitions, 2509 flow [2022-07-19 21:20:37,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 798 transitions, 1807 flow, removed 351 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:37,289 INFO L242 Difference]: Finished difference. Result has 852 places, 784 transitions, 1713 flow [2022-07-19 21:20:37,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1713, PETRI_PLACES=852, PETRI_TRANSITIONS=784} [2022-07-19 21:20:37,290 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 2 predicate places. [2022-07-19 21:20:37,290 INFO L495 AbstractCegarLoop]: Abstraction has has 852 places, 784 transitions, 1713 flow [2022-07-19 21:20:37,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 761.0) internal successors, (2283), 3 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:37,290 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:37,291 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] [2022-07-19 21:20:37,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-07-19 21:20:37,291 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:37,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:37,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1978771530, now seen corresponding path program 1 times [2022-07-19 21:20:37,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:37,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289051366] [2022-07-19 21:20:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:37,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:37,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:37,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289051366] [2022-07-19 21:20:37,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289051366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:37,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657067960] [2022-07-19 21:20:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:37,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:37,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:37,315 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:37,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-19 21:20:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:37,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:37,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:38,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657067960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:38,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:38,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:38,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376700893] [2022-07-19 21:20:38,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:38,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:38,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:38,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:38,010 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-19 21:20:38,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 852 places, 784 transitions, 1713 flow. Second operand has 10 states, 10 states have (on average 761.3) internal successors, (7613), 10 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:38,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:38,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-19 21:20:38,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:38,644 INFO L129 PetriNetUnfolder]: 0/1285 cut-off events. [2022-07-19 21:20:38,645 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-19 21:20:38,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 1285 events. 0/1285 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4322 event pairs, 0 based on Foata normal form. 2/1287 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-07-19 21:20:38,647 INFO L132 encePairwiseOnDemand]: 955/961 looper letters, 37 selfloop transitions, 9 changer transitions 0/794 dead transitions. [2022-07-19 21:20:38,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 794 transitions, 1827 flow [2022-07-19 21:20:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6879 transitions. [2022-07-19 21:20:38,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953520638224072 [2022-07-19 21:20:38,651 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6879 transitions. [2022-07-19 21:20:38,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6879 transitions. [2022-07-19 21:20:38,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:38,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6879 transitions. [2022-07-19 21:20:38,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 764.3333333333334) internal successors, (6879), 9 states have internal predecessors, (6879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:38,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 961.0) internal successors, (9610), 10 states have internal predecessors, (9610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:38,660 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 961.0) internal successors, (9610), 10 states have internal predecessors, (9610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:38,660 INFO L186 Difference]: Start difference. First operand has 852 places, 784 transitions, 1713 flow. Second operand 9 states and 6879 transitions. [2022-07-19 21:20:38,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 794 transitions, 1827 flow [2022-07-19 21:20:38,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 848 places, 794 transitions, 1825 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:38,668 INFO L242 Difference]: Finished difference. Result has 851 places, 790 transitions, 1761 flow [2022-07-19 21:20:38,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=840, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1761, PETRI_PLACES=851, PETRI_TRANSITIONS=790} [2022-07-19 21:20:38,669 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 1 predicate places. [2022-07-19 21:20:38,669 INFO L495 AbstractCegarLoop]: Abstraction has has 851 places, 790 transitions, 1761 flow [2022-07-19 21:20:38,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 761.3) internal successors, (7613), 10 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:38,670 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:38,670 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] [2022-07-19 21:20:38,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:38,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:38,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:38,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1288544033, now seen corresponding path program 1 times [2022-07-19 21:20:38,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:38,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647124332] [2022-07-19 21:20:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:38,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:38,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647124332] [2022-07-19 21:20:38,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647124332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504269708] [2022-07-19 21:20:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:38,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:38,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:38,948 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:38,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-19 21:20:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:39,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:39,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:39,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:39,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504269708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:39,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:39,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:39,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460935317] [2022-07-19 21:20:39,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:39,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:39,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:39,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:39,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:39,734 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-19 21:20:39,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 790 transitions, 1761 flow. Second operand has 18 states, 18 states have (on average 761.6111111111111) internal successors, (13709), 18 states have internal predecessors, (13709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:39,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:39,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-19 21:20:39,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:40,513 INFO L129 PetriNetUnfolder]: 0/1241 cut-off events. [2022-07-19 21:20:40,514 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-19 21:20:40,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 1241 events. 0/1241 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4052 event pairs, 0 based on Foata normal form. 4/1245 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-19 21:20:40,516 INFO L132 encePairwiseOnDemand]: 955/961 looper letters, 45 selfloop transitions, 21 changer transitions 0/814 dead transitions. [2022-07-19 21:20:40,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 814 transitions, 2001 flow [2022-07-19 21:20:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16009 transitions. [2022-07-19 21:20:40,524 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932708983697537 [2022-07-19 21:20:40,524 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16009 transitions. [2022-07-19 21:20:40,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16009 transitions. [2022-07-19 21:20:40,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:40,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16009 transitions. [2022-07-19 21:20:40,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 762.3333333333334) internal successors, (16009), 21 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:40,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 961.0) internal successors, (21142), 22 states have internal predecessors, (21142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:40,547 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 961.0) internal successors, (21142), 22 states have internal predecessors, (21142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:40,547 INFO L186 Difference]: Start difference. First operand has 851 places, 790 transitions, 1761 flow. Second operand 21 states and 16009 transitions. [2022-07-19 21:20:40,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 814 transitions, 2001 flow [2022-07-19 21:20:40,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 814 transitions, 1987 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:40,557 INFO L242 Difference]: Finished difference. Result has 875 places, 803 transitions, 1885 flow [2022-07-19 21:20:40,558 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=850, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1885, PETRI_PLACES=875, PETRI_TRANSITIONS=803} [2022-07-19 21:20:40,559 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 25 predicate places. [2022-07-19 21:20:40,559 INFO L495 AbstractCegarLoop]: Abstraction has has 875 places, 803 transitions, 1885 flow [2022-07-19 21:20:40,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 761.6111111111111) internal successors, (13709), 18 states have internal predecessors, (13709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:40,560 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:40,561 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] [2022-07-19 21:20:40,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-07-19 21:20:40,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:40,780 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:40,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash 786428419, now seen corresponding path program 1 times [2022-07-19 21:20:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:40,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625920697] [2022-07-19 21:20:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:40,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:40,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:40,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625920697] [2022-07-19 21:20:40,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625920697] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:40,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677299588] [2022-07-19 21:20:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:40,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:40,921 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:40,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-19 21:20:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:41,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:41,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:41,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:41,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677299588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:41,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:41,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:41,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824308995] [2022-07-19 21:20:41,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:41,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:41,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:41,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:41,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-19 21:20:41,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 875 places, 803 transitions, 1885 flow. Second operand has 34 states, 34 states have (on average 761.7941176470588) internal successors, (25901), 34 states have internal predecessors, (25901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:41,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:41,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-19 21:20:41,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:42,868 INFO L129 PetriNetUnfolder]: 0/1153 cut-off events. [2022-07-19 21:20:42,869 INFO L130 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2022-07-19 21:20:42,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 1153 events. 0/1153 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3471 event pairs, 0 based on Foata normal form. 8/1161 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-19 21:20:42,871 INFO L132 encePairwiseOnDemand]: 955/961 looper letters, 61 selfloop transitions, 45 changer transitions 0/854 dead transitions. [2022-07-19 21:20:42,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 919 places, 854 transitions, 2413 flow [2022-07-19 21:20:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 34269 transitions. [2022-07-19 21:20:42,886 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924384321886924 [2022-07-19 21:20:42,886 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 34269 transitions. [2022-07-19 21:20:42,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 34269 transitions. [2022-07-19 21:20:42,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:42,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 34269 transitions. [2022-07-19 21:20:42,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 761.5333333333333) internal successors, (34269), 45 states have internal predecessors, (34269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:42,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 961.0) internal successors, (44206), 46 states have internal predecessors, (44206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:42,940 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 961.0) internal successors, (44206), 46 states have internal predecessors, (44206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:42,940 INFO L186 Difference]: Start difference. First operand has 875 places, 803 transitions, 1885 flow. Second operand 45 states and 34269 transitions. [2022-07-19 21:20:42,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 919 places, 854 transitions, 2413 flow [2022-07-19 21:20:42,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 913 places, 854 transitions, 2373 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:42,951 INFO L242 Difference]: Finished difference. Result has 922 places, 828 transitions, 2163 flow [2022-07-19 21:20:42,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2163, PETRI_PLACES=922, PETRI_TRANSITIONS=828} [2022-07-19 21:20:42,952 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 72 predicate places. [2022-07-19 21:20:42,952 INFO L495 AbstractCegarLoop]: Abstraction has has 922 places, 828 transitions, 2163 flow [2022-07-19 21:20:42,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 761.7941176470588) internal successors, (25901), 34 states have internal predecessors, (25901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:42,955 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:42,955 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:42,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-07-19 21:20:43,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:43,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:43,160 INFO L85 PathProgramCache]: Analyzing trace with hash -596766729, now seen corresponding path program 1 times [2022-07-19 21:20:43,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:43,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904281025] [2022-07-19 21:20:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:43,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:43,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:43,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904281025] [2022-07-19 21:20:43,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904281025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:43,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232062850] [2022-07-19 21:20:43,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:43,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:43,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:43,467 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:43,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-07-19 21:20:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:44,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:44,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:44,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:45,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232062850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:45,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:45,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:45,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666260359] [2022-07-19 21:20:45,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:45,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:45,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:45,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-19 21:20:45,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 922 places, 828 transitions, 2163 flow. Second operand has 66 states, 66 states have (on average 761.8939393939394) internal successors, (50285), 66 states have internal predecessors, (50285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:45,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:45,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-19 21:20:45,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:46,842 INFO L129 PetriNetUnfolder]: 0/1010 cut-off events. [2022-07-19 21:20:46,843 INFO L130 PetriNetUnfolder]: For 1740/1740 co-relation queries the response was YES. [2022-07-19 21:20:46,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1725 conditions, 1010 events. 0/1010 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2541 event pairs, 0 based on Foata normal form. 13/1023 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2022-07-19 21:20:46,845 INFO L132 encePairwiseOnDemand]: 956/961 looper letters, 84 selfloop transitions, 82 changer transitions 0/904 dead transitions. [2022-07-19 21:20:46,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 994 places, 904 transitions, 3117 flow [2022-07-19 21:20:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-19 21:20:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-07-19 21:20:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 63935 transitions. [2022-07-19 21:20:46,872 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7920197215202418 [2022-07-19 21:20:46,872 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 63935 transitions. [2022-07-19 21:20:46,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 63935 transitions. [2022-07-19 21:20:46,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:46,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 63935 transitions. [2022-07-19 21:20:47,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 761.1309523809524) internal successors, (63935), 84 states have internal predecessors, (63935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:47,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 961.0) internal successors, (81685), 85 states have internal predecessors, (81685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:47,094 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 961.0) internal successors, (81685), 85 states have internal predecessors, (81685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:47,094 INFO L186 Difference]: Start difference. First operand has 922 places, 828 transitions, 2163 flow. Second operand 84 states and 63935 transitions. [2022-07-19 21:20:47,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 994 places, 904 transitions, 3117 flow [2022-07-19 21:20:47,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 961 places, 904 transitions, 2892 flow, removed 22 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:47,105 INFO L242 Difference]: Finished difference. Result has 961 places, 853 transitions, 2439 flow [2022-07-19 21:20:47,106 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=961, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=878, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=2439, PETRI_PLACES=961, PETRI_TRANSITIONS=853} [2022-07-19 21:20:47,106 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 111 predicate places. [2022-07-19 21:20:47,106 INFO L495 AbstractCegarLoop]: Abstraction has has 961 places, 853 transitions, 2439 flow [2022-07-19 21:20:47,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 761.8939393939394) internal successors, (50285), 66 states have internal predecessors, (50285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:47,111 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:47,112 INFO L200 CegarLoopForPetriNet]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:47,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:47,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-07-19 21:20:47,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -98295915, now seen corresponding path program 1 times [2022-07-19 21:20:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:47,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033767814] [2022-07-19 21:20:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:47,362 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:47,418 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:47,418 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:47,418 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:47,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:47,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-07-19 21:20:47,419 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:20:47,419 WARN L231 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:47,419 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2022-07-19 21:20:47,471 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:47,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 879 places, 994 transitions, 2884 flow [2022-07-19 21:20:48,178 INFO L129 PetriNetUnfolder]: 284/1997 cut-off events. [2022-07-19 21:20:48,178 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-19 21:20:48,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2488 conditions, 1997 events. 284/1997 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7328 event pairs, 0 based on Foata normal form. 0/1655 useless extension candidates. Maximal degree in co-relation 2360. Up to 58 conditions per place. [2022-07-19 21:20:48,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 879 places, 994 transitions, 2884 flow [2022-07-19 21:20:48,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 879 places, 994 transitions, 2884 flow [2022-07-19 21:20:48,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:48,395 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:20:48,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:20:48,399 INFO L129 PetriNetUnfolder]: 5/80 cut-off events. [2022-07-19 21:20:48,399 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:48,399 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:48,399 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] [2022-07-19 21:20:48,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:48,400 INFO L85 PathProgramCache]: Analyzing trace with hash -52084126, now seen corresponding path program 1 times [2022-07-19 21:20:48,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:48,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703095239] [2022-07-19 21:20:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:48,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:48,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:48,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703095239] [2022-07-19 21:20:48,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703095239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:48,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:48,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:48,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302595621] [2022-07-19 21:20:48,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:48,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:48,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:48,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:48,421 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 786 out of 994 [2022-07-19 21:20:48,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 879 places, 994 transitions, 2884 flow. Second operand has 3 states, 3 states have (on average 787.0) internal successors, (2361), 3 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:48,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:48,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 786 of 994 [2022-07-19 21:20:48,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:49,293 INFO L129 PetriNetUnfolder]: 0/1662 cut-off events. [2022-07-19 21:20:49,293 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-19 21:20:49,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2326 conditions, 1662 events. 0/1662 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6782 event pairs, 0 based on Foata normal form. 13605/15211 useless extension candidates. Maximal degree in co-relation 0. Up to 168 conditions per place. [2022-07-19 21:20:49,296 INFO L132 encePairwiseOnDemand]: 819/994 looper letters, 37 selfloop transitions, 2 changer transitions 11/825 dead transitions. [2022-07-19 21:20:49,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 825 transitions, 2624 flow [2022-07-19 21:20:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2577 transitions. [2022-07-19 21:20:49,298 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.864185110663984 [2022-07-19 21:20:49,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2577 transitions. [2022-07-19 21:20:49,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2577 transitions. [2022-07-19 21:20:49,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:49,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2577 transitions. [2022-07-19 21:20:49,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 859.0) internal successors, (2577), 3 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:49,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 994.0) internal successors, (3976), 4 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:49,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 994.0) internal successors, (3976), 4 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:49,302 INFO L186 Difference]: Start difference. First operand has 879 places, 994 transitions, 2884 flow. Second operand 3 states and 2577 transitions. [2022-07-19 21:20:49,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 825 transitions, 2624 flow [2022-07-19 21:20:49,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 880 places, 825 transitions, 1868 flow, removed 378 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:49,314 INFO L242 Difference]: Finished difference. Result has 881 places, 811 transitions, 1772 flow [2022-07-19 21:20:49,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=878, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1772, PETRI_PLACES=881, PETRI_TRANSITIONS=811} [2022-07-19 21:20:49,315 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 2 predicate places. [2022-07-19 21:20:49,315 INFO L495 AbstractCegarLoop]: Abstraction has has 881 places, 811 transitions, 1772 flow [2022-07-19 21:20:49,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 787.0) internal successors, (2361), 3 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:49,315 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:49,315 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] [2022-07-19 21:20:49,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-07-19 21:20:49,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:49,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1881358998, now seen corresponding path program 1 times [2022-07-19 21:20:49,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:49,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973613096] [2022-07-19 21:20:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:49,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:49,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:49,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973613096] [2022-07-19 21:20:49,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973613096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:49,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261253110] [2022-07-19 21:20:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:49,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:49,345 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:49,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-07-19 21:20:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:50,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:20:50,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:50,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:50,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261253110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:50,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:50,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:20:50,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589017463] [2022-07-19 21:20:50,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:50,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:20:50,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:20:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:20:50,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-19 21:20:50,095 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 811 transitions, 1772 flow. Second operand has 10 states, 10 states have (on average 787.3) internal successors, (7873), 10 states have internal predecessors, (7873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:50,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:50,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-19 21:20:50,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:50,836 INFO L129 PetriNetUnfolder]: 0/1332 cut-off events. [2022-07-19 21:20:50,836 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:20:50,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 1332 events. 0/1332 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4491 event pairs, 0 based on Foata normal form. 2/1334 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-07-19 21:20:50,839 INFO L132 encePairwiseOnDemand]: 988/994 looper letters, 38 selfloop transitions, 9 changer transitions 0/821 dead transitions. [2022-07-19 21:20:50,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 878 places, 821 transitions, 1888 flow [2022-07-19 21:20:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:20:50,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:20:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7114 transitions. [2022-07-19 21:20:50,842 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7952157388777107 [2022-07-19 21:20:50,843 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7114 transitions. [2022-07-19 21:20:50,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7114 transitions. [2022-07-19 21:20:50,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:50,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7114 transitions. [2022-07-19 21:20:50,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 790.4444444444445) internal successors, (7114), 9 states have internal predecessors, (7114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:50,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 994.0) internal successors, (9940), 10 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) [2022-07-19 21:20:50,852 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 994.0) internal successors, (9940), 10 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) [2022-07-19 21:20:50,852 INFO L186 Difference]: Start difference. First operand has 881 places, 811 transitions, 1772 flow. Second operand 9 states and 7114 transitions. [2022-07-19 21:20:50,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 878 places, 821 transitions, 1888 flow [2022-07-19 21:20:50,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 877 places, 821 transitions, 1886 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:50,860 INFO L242 Difference]: Finished difference. Result has 880 places, 817 transitions, 1820 flow [2022-07-19 21:20:50,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=805, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1820, PETRI_PLACES=880, PETRI_TRANSITIONS=817} [2022-07-19 21:20:50,865 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 1 predicate places. [2022-07-19 21:20:50,865 INFO L495 AbstractCegarLoop]: Abstraction has has 880 places, 817 transitions, 1820 flow [2022-07-19 21:20:50,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 787.3) internal successors, (7873), 10 states have internal predecessors, (7873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:50,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:50,866 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] [2022-07-19 21:20:50,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:51,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-07-19 21:20:51,086 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:51,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2118794433, now seen corresponding path program 1 times [2022-07-19 21:20:51,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:51,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530778642] [2022-07-19 21:20:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:51,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:51,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:51,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530778642] [2022-07-19 21:20:51,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530778642] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:51,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714697716] [2022-07-19 21:20:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:51,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:51,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:51,132 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:51,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-07-19 21:20:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:20:51,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:51,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:51,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714697716] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:51,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:51,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:20:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194096645] [2022-07-19 21:20:51,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:51,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:20:51,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:51,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:20:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:20:51,858 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-19 21:20:51,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 880 places, 817 transitions, 1820 flow. Second operand has 18 states, 18 states have (on average 787.6111111111111) internal successors, (14177), 18 states have internal predecessors, (14177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:51,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:51,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-19 21:20:51,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:52,681 INFO L129 PetriNetUnfolder]: 0/1288 cut-off events. [2022-07-19 21:20:52,682 INFO L130 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-07-19 21:20:52,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 1288 events. 0/1288 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4224 event pairs, 0 based on Foata normal form. 4/1292 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-19 21:20:52,685 INFO L132 encePairwiseOnDemand]: 988/994 looper letters, 46 selfloop transitions, 21 changer transitions 0/841 dead transitions. [2022-07-19 21:20:52,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 841 transitions, 2062 flow [2022-07-19 21:20:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:20:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:20:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16556 transitions. [2022-07-19 21:20:52,693 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931397911277187 [2022-07-19 21:20:52,693 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16556 transitions. [2022-07-19 21:20:52,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16556 transitions. [2022-07-19 21:20:52,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:52,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16556 transitions. [2022-07-19 21:20:52,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 788.3809523809524) internal successors, (16556), 21 states have internal predecessors, (16556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:52,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 994.0) internal successors, (21868), 22 states have internal predecessors, (21868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:52,719 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 994.0) internal successors, (21868), 22 states have internal predecessors, (21868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:52,719 INFO L186 Difference]: Start difference. First operand has 880 places, 817 transitions, 1820 flow. Second operand 21 states and 16556 transitions. [2022-07-19 21:20:52,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 841 transitions, 2062 flow [2022-07-19 21:20:52,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 899 places, 841 transitions, 2048 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:52,730 INFO L242 Difference]: Finished difference. Result has 904 places, 830 transitions, 1944 flow [2022-07-19 21:20:52,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=879, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1944, PETRI_PLACES=904, PETRI_TRANSITIONS=830} [2022-07-19 21:20:52,731 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 25 predicate places. [2022-07-19 21:20:52,731 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 830 transitions, 1944 flow [2022-07-19 21:20:52,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 787.6111111111111) internal successors, (14177), 18 states have internal predecessors, (14177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:52,732 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:52,733 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] [2022-07-19 21:20:52,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:52,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:52,953 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash 773674275, now seen corresponding path program 1 times [2022-07-19 21:20:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:52,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024437735] [2022-07-19 21:20:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:53,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024437735] [2022-07-19 21:20:53,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024437735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614512321] [2022-07-19 21:20:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:53,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:53,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:53,106 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:53,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-07-19 21:20:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:53,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:20:53,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:53,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:54,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614512321] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:54,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:54,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:20:54,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340679067] [2022-07-19 21:20:54,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:54,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:20:54,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:54,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:20:54,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:20:54,082 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-19 21:20:54,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 830 transitions, 1944 flow. Second operand has 34 states, 34 states have (on average 787.7941176470588) internal successors, (26785), 34 states have internal predecessors, (26785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:54,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:54,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-19 21:20:54,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:55,089 INFO L129 PetriNetUnfolder]: 0/1200 cut-off events. [2022-07-19 21:20:55,090 INFO L130 PetriNetUnfolder]: For 627/627 co-relation queries the response was YES. [2022-07-19 21:20:55,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1935 conditions, 1200 events. 0/1200 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3640 event pairs, 0 based on Foata normal form. 8/1208 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-19 21:20:55,092 INFO L132 encePairwiseOnDemand]: 988/994 looper letters, 62 selfloop transitions, 45 changer transitions 0/881 dead transitions. [2022-07-19 21:20:55,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 881 transitions, 2474 flow [2022-07-19 21:20:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:20:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:20:55,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 35440 transitions. [2022-07-19 21:20:55,112 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923094120277219 [2022-07-19 21:20:55,112 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 35440 transitions. [2022-07-19 21:20:55,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 35440 transitions. [2022-07-19 21:20:55,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:55,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 35440 transitions. [2022-07-19 21:20:55,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 787.5555555555555) internal successors, (35440), 45 states have internal predecessors, (35440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:55,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 994.0) internal successors, (45724), 46 states have internal predecessors, (45724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:55,171 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 994.0) internal successors, (45724), 46 states have internal predecessors, (45724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:55,171 INFO L186 Difference]: Start difference. First operand has 904 places, 830 transitions, 1944 flow. Second operand 45 states and 35440 transitions. [2022-07-19 21:20:55,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 881 transitions, 2474 flow [2022-07-19 21:20:55,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 942 places, 881 transitions, 2434 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:20:55,184 INFO L242 Difference]: Finished difference. Result has 951 places, 855 transitions, 2222 flow [2022-07-19 21:20:55,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=898, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2222, PETRI_PLACES=951, PETRI_TRANSITIONS=855} [2022-07-19 21:20:55,185 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 72 predicate places. [2022-07-19 21:20:55,185 INFO L495 AbstractCegarLoop]: Abstraction has has 951 places, 855 transitions, 2222 flow [2022-07-19 21:20:55,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 787.7941176470588) internal successors, (26785), 34 states have internal predecessors, (26785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:55,187 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:55,187 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:55,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-07-19 21:20:55,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-07-19 21:20:55,391 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1681030679, now seen corresponding path program 1 times [2022-07-19 21:20:55,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:55,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549007321] [2022-07-19 21:20:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:55,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:55,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549007321] [2022-07-19 21:20:55,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549007321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:20:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102873001] [2022-07-19 21:20:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:55,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:55,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:55,689 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:20:55,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-07-19 21:20:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:20:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:20:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:56,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:20:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:20:57,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102873001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:20:57,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:20:57,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:20:57,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112461451] [2022-07-19 21:20:57,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:20:57,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:20:57,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:20:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:20:57,223 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-19 21:20:57,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 951 places, 855 transitions, 2222 flow. Second operand has 66 states, 66 states have (on average 787.8939393939394) internal successors, (52001), 66 states have internal predecessors, (52001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:57,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:57,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-19 21:20:57,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:58,972 INFO L129 PetriNetUnfolder]: 0/1046 cut-off events. [2022-07-19 21:20:58,973 INFO L130 PetriNetUnfolder]: For 1861/1861 co-relation queries the response was YES. [2022-07-19 21:20:58,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1788 conditions, 1046 events. 0/1046 cut-off events. For 1861/1861 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2639 event pairs, 0 based on Foata normal form. 14/1060 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2022-07-19 21:20:58,975 INFO L132 encePairwiseOnDemand]: 989/994 looper letters, 87 selfloop transitions, 85 changer transitions 0/936 dead transitions. [2022-07-19 21:20:58,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1026 places, 936 transitions, 3232 flow [2022-07-19 21:20:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-19 21:20:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-19 21:20:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 68481 transitions. [2022-07-19 21:20:59,086 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918892666342885 [2022-07-19 21:20:59,086 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 68481 transitions. [2022-07-19 21:20:59,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 68481 transitions. [2022-07-19 21:20:59,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:59,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 68481 transitions. [2022-07-19 21:20:59,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 787.1379310344828) internal successors, (68481), 87 states have internal predecessors, (68481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:59,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 994.0) internal successors, (87472), 88 states have internal predecessors, (87472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:59,194 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 994.0) internal successors, (87472), 88 states have internal predecessors, (87472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:59,194 INFO L186 Difference]: Start difference. First operand has 951 places, 855 transitions, 2222 flow. Second operand 87 states and 68481 transitions. [2022-07-19 21:20:59,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1026 places, 936 transitions, 3232 flow [2022-07-19 21:20:59,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 936 transitions, 2999 flow, removed 23 selfloop flow, removed 33 redundant places. [2022-07-19 21:20:59,208 INFO L242 Difference]: Finished difference. Result has 993 places, 883 transitions, 2527 flow [2022-07-19 21:20:59,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=994, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=907, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=2527, PETRI_PLACES=993, PETRI_TRANSITIONS=883} [2022-07-19 21:20:59,209 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 114 predicate places. [2022-07-19 21:20:59,209 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 883 transitions, 2527 flow [2022-07-19 21:20:59,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 787.8939393939394) internal successors, (52001), 66 states have internal predecessors, (52001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:59,215 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:59,215 INFO L200 CegarLoopForPetriNet]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:59,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-07-19 21:20:59,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:20:59,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:20:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1162920604, now seen corresponding path program 1 times [2022-07-19 21:20:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:59,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296900030] [2022-07-19 21:20:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:59,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:59,466 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:59,524 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:59,524 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:59,524 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:20:59,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:20:59,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-07-19 21:20:59,525 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:20:59,525 WARN L231 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:59,525 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2022-07-19 21:20:59,571 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:20:59,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 908 places, 1027 transitions, 3011 flow [2022-07-19 21:21:00,378 INFO L129 PetriNetUnfolder]: 294/2066 cut-off events. [2022-07-19 21:21:00,379 INFO L130 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2022-07-19 21:21:00,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2589 conditions, 2066 events. 294/2066 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7498 event pairs, 0 based on Foata normal form. 0/1712 useless extension candidates. Maximal degree in co-relation 2460. Up to 60 conditions per place. [2022-07-19 21:21:00,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 908 places, 1027 transitions, 3011 flow [2022-07-19 21:21:00,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 908 places, 1027 transitions, 3011 flow [2022-07-19 21:21:00,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:21:00,605 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:21:00,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:21:00,608 INFO L129 PetriNetUnfolder]: 2/73 cut-off events. [2022-07-19 21:21:00,609 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:21:00,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:00,609 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:00,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:00,609 INFO L85 PathProgramCache]: Analyzing trace with hash 789082081, now seen corresponding path program 1 times [2022-07-19 21:21:00,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:00,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007689281] [2022-07-19 21:21:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:00,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:00,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:00,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007689281] [2022-07-19 21:21:00,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007689281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:00,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:00,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:21:00,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880892832] [2022-07-19 21:21:00,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:00,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:21:00,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:00,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:21:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:21:00,626 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 819 out of 1027 [2022-07-19 21:21:00,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 1027 transitions, 3011 flow. Second operand has 2 states, 2 states have (on average 819.5) internal successors, (1639), 2 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:00,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:00,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 819 of 1027 [2022-07-19 21:21:00,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:01,407 INFO L129 PetriNetUnfolder]: 0/1742 cut-off events. [2022-07-19 21:21:01,407 INFO L130 PetriNetUnfolder]: For 4901/4901 co-relation queries the response was YES. [2022-07-19 21:21:01,407 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 1742 events. 0/1742 cut-off events. For 4901/4901 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 7105 event pairs, 0 based on Foata normal form. 2564/4246 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-19 21:21:01,410 INFO L132 encePairwiseOnDemand]: 849/1027 looper letters, 29 selfloop transitions, 0 changer transitions 11/848 dead transitions. [2022-07-19 21:21:01,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 848 transitions, 2711 flow [2022-07-19 21:21:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:21:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:21:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1845 transitions. [2022-07-19 21:21:01,412 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8982473222979552 [2022-07-19 21:21:01,412 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1845 transitions. [2022-07-19 21:21:01,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1845 transitions. [2022-07-19 21:21:01,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:01,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1845 transitions. [2022-07-19 21:21:01,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 922.5) internal successors, (1845), 2 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:01,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1027.0) internal successors, (3081), 3 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:01,415 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1027.0) internal successors, (3081), 3 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:01,415 INFO L186 Difference]: Start difference. First operand has 908 places, 1027 transitions, 3011 flow. Second operand 2 states and 1845 transitions. [2022-07-19 21:21:01,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 848 transitions, 2711 flow [2022-07-19 21:21:01,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 908 places, 848 transitions, 1899 flow, removed 406 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:01,430 INFO L242 Difference]: Finished difference. Result has 908 places, 837 transitions, 1819 flow [2022-07-19 21:21:01,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=907, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1819, PETRI_PLACES=908, PETRI_TRANSITIONS=837} [2022-07-19 21:21:01,431 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 0 predicate places. [2022-07-19 21:21:01,431 INFO L495 AbstractCegarLoop]: Abstraction has has 908 places, 837 transitions, 1819 flow [2022-07-19 21:21:01,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 819.5) internal successors, (1639), 2 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:01,432 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:01,432 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:01,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-07-19 21:21:01,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1007869278, now seen corresponding path program 1 times [2022-07-19 21:21:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:01,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220134686] [2022-07-19 21:21:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:01,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:01,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220134686] [2022-07-19 21:21:01,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220134686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:01,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:01,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:21:01,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013830639] [2022-07-19 21:21:01,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:01,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:21:01,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:01,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:21:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:21:01,468 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 812 out of 1027 [2022-07-19 21:21:01,469 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 837 transitions, 1819 flow. Second operand has 3 states, 3 states have (on average 813.0) internal successors, (2439), 3 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:01,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:01,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 812 of 1027 [2022-07-19 21:21:01,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:02,137 INFO L129 PetriNetUnfolder]: 0/1401 cut-off events. [2022-07-19 21:21:02,138 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-19 21:21:02,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1698 conditions, 1401 events. 0/1401 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4819 event pairs, 0 based on Foata normal form. 0/1372 useless extension candidates. Maximal degree in co-relation 0. Up to 174 conditions per place. [2022-07-19 21:21:02,140 INFO L132 encePairwiseOnDemand]: 1024/1027 looper letters, 38 selfloop transitions, 2 changer transitions 0/841 dead transitions. [2022-07-19 21:21:02,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 899 places, 841 transitions, 1907 flow [2022-07-19 21:21:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:21:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:21:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2477 transitions. [2022-07-19 21:21:02,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8039597533268419 [2022-07-19 21:21:02,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2477 transitions. [2022-07-19 21:21:02,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2477 transitions. [2022-07-19 21:21:02,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:02,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2477 transitions. [2022-07-19 21:21:02,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 825.6666666666666) internal successors, (2477), 3 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:02,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1027.0) internal successors, (4108), 4 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:02,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1027.0) internal successors, (4108), 4 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:02,146 INFO L186 Difference]: Start difference. First operand has 908 places, 837 transitions, 1819 flow. Second operand 3 states and 2477 transitions. [2022-07-19 21:21:02,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 899 places, 841 transitions, 1907 flow [2022-07-19 21:21:02,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 899 places, 841 transitions, 1907 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:02,155 INFO L242 Difference]: Finished difference. Result has 900 places, 838 transitions, 1831 flow [2022-07-19 21:21:02,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=897, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1831, PETRI_PLACES=900, PETRI_TRANSITIONS=838} [2022-07-19 21:21:02,155 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, -8 predicate places. [2022-07-19 21:21:02,155 INFO L495 AbstractCegarLoop]: Abstraction has has 900 places, 838 transitions, 1831 flow [2022-07-19 21:21:02,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 813.0) internal successors, (2439), 3 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:02,156 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:02,156 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] [2022-07-19 21:21:02,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-07-19 21:21:02,156 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:02,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1656216362, now seen corresponding path program 1 times [2022-07-19 21:21:02,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:02,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796652787] [2022-07-19 21:21:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:02,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:02,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796652787] [2022-07-19 21:21:02,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796652787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649863816] [2022-07-19 21:21:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:02,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:02,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:02,183 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:02,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-07-19 21:21:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:02,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:21:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:02,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:02,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649863816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:02,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:02,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:21:02,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774585598] [2022-07-19 21:21:02,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:02,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:21:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:21:02,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:21:02,972 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-19 21:21:02,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 900 places, 838 transitions, 1831 flow. Second operand has 10 states, 10 states have (on average 813.3) internal successors, (8133), 10 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:02,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:02,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-19 21:21:02,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:03,752 INFO L129 PetriNetUnfolder]: 0/1379 cut-off events. [2022-07-19 21:21:03,752 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-19 21:21:03,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1763 conditions, 1379 events. 0/1379 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4686 event pairs, 0 based on Foata normal form. 2/1381 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-07-19 21:21:03,755 INFO L132 encePairwiseOnDemand]: 1021/1027 looper letters, 39 selfloop transitions, 9 changer transitions 0/848 dead transitions. [2022-07-19 21:21:03,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 848 transitions, 1949 flow [2022-07-19 21:21:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7349 transitions. [2022-07-19 21:21:03,760 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7950881748350103 [2022-07-19 21:21:03,760 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7349 transitions. [2022-07-19 21:21:03,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7349 transitions. [2022-07-19 21:21:03,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:03,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7349 transitions. [2022-07-19 21:21:03,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 816.5555555555555) internal successors, (7349), 9 states have internal predecessors, (7349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:03,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1027.0) internal successors, (10270), 10 states have internal predecessors, (10270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:03,770 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1027.0) internal successors, (10270), 10 states have internal predecessors, (10270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:03,770 INFO L186 Difference]: Start difference. First operand has 900 places, 838 transitions, 1831 flow. Second operand 9 states and 7349 transitions. [2022-07-19 21:21:03,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 848 transitions, 1949 flow [2022-07-19 21:21:03,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 907 places, 848 transitions, 1947 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:03,779 INFO L242 Difference]: Finished difference. Result has 910 places, 844 transitions, 1879 flow [2022-07-19 21:21:03,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=899, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1879, PETRI_PLACES=910, PETRI_TRANSITIONS=844} [2022-07-19 21:21:03,780 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 2 predicate places. [2022-07-19 21:21:03,780 INFO L495 AbstractCegarLoop]: Abstraction has has 910 places, 844 transitions, 1879 flow [2022-07-19 21:21:03,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 813.3) internal successors, (8133), 10 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:03,781 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:03,781 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] [2022-07-19 21:21:03,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:03,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:03,997 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash 37331713, now seen corresponding path program 1 times [2022-07-19 21:21:03,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:03,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713042359] [2022-07-19 21:21:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:03,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:04,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:04,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713042359] [2022-07-19 21:21:04,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713042359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:04,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484402120] [2022-07-19 21:21:04,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:04,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:04,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:04,041 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:04,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-07-19 21:21:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:04,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:21:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:04,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:04,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484402120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:04,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:04,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:21:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121453069] [2022-07-19 21:21:04,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:04,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:21:04,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:21:04,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:04,920 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-19 21:21:04,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 910 places, 844 transitions, 1879 flow. Second operand has 18 states, 18 states have (on average 813.6111111111111) internal successors, (14645), 18 states have internal predecessors, (14645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:04,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:04,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-19 21:21:04,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:05,785 INFO L129 PetriNetUnfolder]: 0/1335 cut-off events. [2022-07-19 21:21:05,785 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-19 21:21:05,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 1335 events. 0/1335 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4374 event pairs, 0 based on Foata normal form. 4/1339 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-07-19 21:21:05,788 INFO L132 encePairwiseOnDemand]: 1021/1027 looper letters, 47 selfloop transitions, 21 changer transitions 0/868 dead transitions. [2022-07-19 21:21:05,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 868 transitions, 2123 flow [2022-07-19 21:21:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:21:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:21:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17103 transitions. [2022-07-19 21:21:05,805 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930171094728057 [2022-07-19 21:21:05,805 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17103 transitions. [2022-07-19 21:21:05,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17103 transitions. [2022-07-19 21:21:05,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:05,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17103 transitions. [2022-07-19 21:21:05,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 814.4285714285714) internal successors, (17103), 21 states have internal predecessors, (17103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:05,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1027.0) internal successors, (22594), 22 states have internal predecessors, (22594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:05,875 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1027.0) internal successors, (22594), 22 states have internal predecessors, (22594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:05,876 INFO L186 Difference]: Start difference. First operand has 910 places, 844 transitions, 1879 flow. Second operand 21 states and 17103 transitions. [2022-07-19 21:21:05,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 868 transitions, 2123 flow [2022-07-19 21:21:05,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 868 transitions, 2109 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:05,887 INFO L242 Difference]: Finished difference. Result has 934 places, 857 transitions, 2003 flow [2022-07-19 21:21:05,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=909, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=833, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2003, PETRI_PLACES=934, PETRI_TRANSITIONS=857} [2022-07-19 21:21:05,889 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 26 predicate places. [2022-07-19 21:21:05,889 INFO L495 AbstractCegarLoop]: Abstraction has has 934 places, 857 transitions, 2003 flow [2022-07-19 21:21:05,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 813.6111111111111) internal successors, (14645), 18 states have internal predecessors, (14645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:05,891 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:05,891 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] [2022-07-19 21:21:05,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:06,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-07-19 21:21:06,112 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2036581219, now seen corresponding path program 1 times [2022-07-19 21:21:06,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:06,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551363358] [2022-07-19 21:21:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:06,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:06,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:06,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551363358] [2022-07-19 21:21:06,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551363358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:06,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429617458] [2022-07-19 21:21:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:06,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:06,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:06,232 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:06,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-07-19 21:21:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:06,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:21:06,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:07,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:07,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429617458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:07,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:07,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:21:07,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563646125] [2022-07-19 21:21:07,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:07,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:21:07,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:07,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:21:07,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:21:07,258 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-19 21:21:07,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 934 places, 857 transitions, 2003 flow. Second operand has 34 states, 34 states have (on average 813.7941176470588) internal successors, (27669), 34 states have internal predecessors, (27669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:07,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:07,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-19 21:21:07,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:08,445 INFO L129 PetriNetUnfolder]: 0/1247 cut-off events. [2022-07-19 21:21:08,446 INFO L130 PetriNetUnfolder]: For 654/654 co-relation queries the response was YES. [2022-07-19 21:21:08,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 1247 events. 0/1247 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3798 event pairs, 0 based on Foata normal form. 8/1255 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-19 21:21:08,449 INFO L132 encePairwiseOnDemand]: 1021/1027 looper letters, 63 selfloop transitions, 45 changer transitions 0/908 dead transitions. [2022-07-19 21:21:08,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 908 transitions, 2535 flow [2022-07-19 21:21:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:21:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:21:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 36611 transitions. [2022-07-19 21:21:08,466 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921886833279238 [2022-07-19 21:21:08,467 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 36611 transitions. [2022-07-19 21:21:08,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 36611 transitions. [2022-07-19 21:21:08,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:08,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 36611 transitions. [2022-07-19 21:21:08,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 813.5777777777778) internal successors, (36611), 45 states have internal predecessors, (36611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:08,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1027.0) internal successors, (47242), 46 states have internal predecessors, (47242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:08,529 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1027.0) internal successors, (47242), 46 states have internal predecessors, (47242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:08,530 INFO L186 Difference]: Start difference. First operand has 934 places, 857 transitions, 2003 flow. Second operand 45 states and 36611 transitions. [2022-07-19 21:21:08,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 908 transitions, 2535 flow [2022-07-19 21:21:08,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 972 places, 908 transitions, 2495 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:08,543 INFO L242 Difference]: Finished difference. Result has 981 places, 882 transitions, 2281 flow [2022-07-19 21:21:08,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2281, PETRI_PLACES=981, PETRI_TRANSITIONS=882} [2022-07-19 21:21:08,544 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 73 predicate places. [2022-07-19 21:21:08,544 INFO L495 AbstractCegarLoop]: Abstraction has has 981 places, 882 transitions, 2281 flow [2022-07-19 21:21:08,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 813.7941176470588) internal successors, (27669), 34 states have internal predecessors, (27669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:08,547 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:08,547 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:08,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-07-19 21:21:08,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-07-19 21:21:08,763 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash -517014441, now seen corresponding path program 1 times [2022-07-19 21:21:08,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:08,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844401650] [2022-07-19 21:21:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:08,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:09,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:09,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844401650] [2022-07-19 21:21:09,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844401650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:09,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091605831] [2022-07-19 21:21:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:09,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:09,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:09,028 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:09,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-07-19 21:21:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:09,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:21:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:09,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:10,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091605831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:10,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:10,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:21:10,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165638553] [2022-07-19 21:21:10,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:10,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:21:10,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:21:10,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:21:10,490 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-19 21:21:10,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 981 places, 882 transitions, 2281 flow. Second operand has 66 states, 66 states have (on average 813.8939393939394) internal successors, (53717), 66 states have internal predecessors, (53717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:10,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:10,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-19 21:21:10,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:12,404 INFO L129 PetriNetUnfolder]: 0/1082 cut-off events. [2022-07-19 21:21:12,405 INFO L130 PetriNetUnfolder]: For 1982/1982 co-relation queries the response was YES. [2022-07-19 21:21:12,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 1082 events. 0/1082 cut-off events. For 1982/1982 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2737 event pairs, 0 based on Foata normal form. 15/1097 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-19 21:21:12,407 INFO L132 encePairwiseOnDemand]: 1022/1027 looper letters, 90 selfloop transitions, 88 changer transitions 0/968 dead transitions. [2022-07-19 21:21:12,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 968 transitions, 3347 flow [2022-07-19 21:21:12,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-19 21:21:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-07-19 21:21:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 73183 transitions. [2022-07-19 21:21:12,439 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7917667423996538 [2022-07-19 21:21:12,440 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 73183 transitions. [2022-07-19 21:21:12,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 73183 transitions. [2022-07-19 21:21:12,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:12,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 73183 transitions. [2022-07-19 21:21:12,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 813.1444444444444) internal successors, (73183), 90 states have internal predecessors, (73183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:12,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 1027.0) internal successors, (93457), 91 states have internal predecessors, (93457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:12,560 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 1027.0) internal successors, (93457), 91 states have internal predecessors, (93457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:12,560 INFO L186 Difference]: Start difference. First operand has 981 places, 882 transitions, 2281 flow. Second operand 90 states and 73183 transitions. [2022-07-19 21:21:12,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 968 transitions, 3347 flow [2022-07-19 21:21:12,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1026 places, 968 transitions, 3106 flow, removed 24 selfloop flow, removed 33 redundant places. [2022-07-19 21:21:12,574 INFO L242 Difference]: Finished difference. Result has 1026 places, 913 transitions, 2615 flow [2022-07-19 21:21:12,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=937, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=2615, PETRI_PLACES=1026, PETRI_TRANSITIONS=913} [2022-07-19 21:21:12,575 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 118 predicate places. [2022-07-19 21:21:12,575 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 913 transitions, 2615 flow [2022-07-19 21:21:12,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 813.8939393939394) internal successors, (53717), 66 states have internal predecessors, (53717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:12,581 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:12,581 INFO L200 CegarLoopForPetriNet]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:12,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:12,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-07-19 21:21:12,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:12,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1024905612, now seen corresponding path program 1 times [2022-07-19 21:21:12,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:12,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660779377] [2022-07-19 21:21:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:12,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:12,832 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:21:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:12,911 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:21:12,912 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:21:12,912 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:21:12,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:21:12,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-07-19 21:21:12,912 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:12,913 WARN L231 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:21:12,913 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2022-07-19 21:21:12,961 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:21:12,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 937 places, 1060 transitions, 3140 flow [2022-07-19 21:21:13,826 INFO L129 PetriNetUnfolder]: 304/2135 cut-off events. [2022-07-19 21:21:13,826 INFO L130 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2022-07-19 21:21:13,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2691 conditions, 2135 events. 304/2135 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7817 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2561. Up to 62 conditions per place. [2022-07-19 21:21:13,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 937 places, 1060 transitions, 3140 flow [2022-07-19 21:21:14,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 937 places, 1060 transitions, 3140 flow [2022-07-19 21:21:14,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:21:14,071 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:21:14,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:21:14,074 INFO L129 PetriNetUnfolder]: 5/82 cut-off events. [2022-07-19 21:21:14,074 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:21:14,074 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:14,074 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] [2022-07-19 21:21:14,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:14,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:14,075 INFO L85 PathProgramCache]: Analyzing trace with hash 460498338, now seen corresponding path program 1 times [2022-07-19 21:21:14,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:14,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375333677] [2022-07-19 21:21:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:14,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:14,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375333677] [2022-07-19 21:21:14,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375333677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:14,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:14,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:21:14,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568505094] [2022-07-19 21:21:14,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:14,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:21:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:21:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:21:14,097 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 838 out of 1060 [2022-07-19 21:21:14,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 937 places, 1060 transitions, 3140 flow. Second operand has 3 states, 3 states have (on average 839.0) internal successors, (2517), 3 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:14,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:14,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 838 of 1060 [2022-07-19 21:21:14,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:15,058 INFO L129 PetriNetUnfolder]: 0/1778 cut-off events. [2022-07-19 21:21:15,058 INFO L130 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2022-07-19 21:21:15,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 1778 events. 0/1778 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7291 event pairs, 0 based on Foata normal form. 15654/17372 useless extension candidates. Maximal degree in co-relation 0. Up to 180 conditions per place. [2022-07-19 21:21:15,061 INFO L132 encePairwiseOnDemand]: 873/1060 looper letters, 39 selfloop transitions, 2 changer transitions 11/879 dead transitions. [2022-07-19 21:21:15,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 938 places, 879 transitions, 2860 flow [2022-07-19 21:21:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:21:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:21:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2747 transitions. [2022-07-19 21:21:15,063 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8638364779874214 [2022-07-19 21:21:15,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2747 transitions. [2022-07-19 21:21:15,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2747 transitions. [2022-07-19 21:21:15,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:15,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2747 transitions. [2022-07-19 21:21:15,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 915.6666666666666) internal successors, (2747), 3 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:15,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1060.0) internal successors, (4240), 4 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:15,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1060.0) internal successors, (4240), 4 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:15,068 INFO L186 Difference]: Start difference. First operand has 937 places, 1060 transitions, 3140 flow. Second operand 3 states and 2747 transitions. [2022-07-19 21:21:15,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 938 places, 879 transitions, 2860 flow [2022-07-19 21:21:15,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 938 places, 879 transitions, 1990 flow, removed 435 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:15,081 INFO L242 Difference]: Finished difference. Result has 939 places, 865 transitions, 1890 flow [2022-07-19 21:21:15,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=873, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1890, PETRI_PLACES=939, PETRI_TRANSITIONS=865} [2022-07-19 21:21:15,082 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 2 predicate places. [2022-07-19 21:21:15,082 INFO L495 AbstractCegarLoop]: Abstraction has has 939 places, 865 transitions, 1890 flow [2022-07-19 21:21:15,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 839.0) internal successors, (2517), 3 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:15,082 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:15,082 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] [2022-07-19 21:21:15,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-07-19 21:21:15,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:15,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:15,083 INFO L85 PathProgramCache]: Analyzing trace with hash 293404278, now seen corresponding path program 1 times [2022-07-19 21:21:15,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:15,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254700179] [2022-07-19 21:21:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:15,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:15,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:15,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254700179] [2022-07-19 21:21:15,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254700179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:15,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697260898] [2022-07-19 21:21:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:15,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:15,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:15,109 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:15,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-07-19 21:21:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:15,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:21:15,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:15,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:15,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697260898] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:15,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:15,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:21:15,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829231274] [2022-07-19 21:21:15,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:15,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:21:15,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:15,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:21:15,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:21:15,886 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-19 21:21:15,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 939 places, 865 transitions, 1890 flow. Second operand has 10 states, 10 states have (on average 839.3) internal successors, (8393), 10 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:15,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:15,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-19 21:21:15,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:16,758 INFO L129 PetriNetUnfolder]: 0/1426 cut-off events. [2022-07-19 21:21:16,759 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-07-19 21:21:16,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1822 conditions, 1426 events. 0/1426 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4857 event pairs, 0 based on Foata normal form. 2/1428 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-07-19 21:21:16,762 INFO L132 encePairwiseOnDemand]: 1054/1060 looper letters, 40 selfloop transitions, 9 changer transitions 0/875 dead transitions. [2022-07-19 21:21:16,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 936 places, 875 transitions, 2010 flow [2022-07-19 21:21:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7584 transitions. [2022-07-19 21:21:16,766 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7949685534591195 [2022-07-19 21:21:16,766 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7584 transitions. [2022-07-19 21:21:16,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7584 transitions. [2022-07-19 21:21:16,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:16,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7584 transitions. [2022-07-19 21:21:16,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 842.6666666666666) internal successors, (7584), 9 states have internal predecessors, (7584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:16,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1060.0) internal successors, (10600), 10 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:16,777 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1060.0) internal successors, (10600), 10 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:16,777 INFO L186 Difference]: Start difference. First operand has 939 places, 865 transitions, 1890 flow. Second operand 9 states and 7584 transitions. [2022-07-19 21:21:16,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 936 places, 875 transitions, 2010 flow [2022-07-19 21:21:16,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 935 places, 875 transitions, 2008 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:16,787 INFO L242 Difference]: Finished difference. Result has 938 places, 871 transitions, 1938 flow [2022-07-19 21:21:16,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=927, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=859, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1938, PETRI_PLACES=938, PETRI_TRANSITIONS=871} [2022-07-19 21:21:16,788 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 1 predicate places. [2022-07-19 21:21:16,788 INFO L495 AbstractCegarLoop]: Abstraction has has 938 places, 871 transitions, 1938 flow [2022-07-19 21:21:16,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 839.3) internal successors, (8393), 10 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:16,789 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:16,789 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] [2022-07-19 21:21:16,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-07-19 21:21:17,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:17,010 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash -660876831, now seen corresponding path program 1 times [2022-07-19 21:21:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:17,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584627510] [2022-07-19 21:21:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:17,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:17,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:17,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584627510] [2022-07-19 21:21:17,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584627510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:17,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678971085] [2022-07-19 21:21:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:17,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:17,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:17,055 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:17,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-07-19 21:21:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:21:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:17,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:17,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678971085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:17,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:17,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:21:17,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257529552] [2022-07-19 21:21:17,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:17,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:21:17,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:17,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:21:17,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:17,970 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-19 21:21:17,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 938 places, 871 transitions, 1938 flow. Second operand has 18 states, 18 states have (on average 839.6111111111111) internal successors, (15113), 18 states have internal predecessors, (15113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:17,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:17,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-19 21:21:17,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:18,821 INFO L129 PetriNetUnfolder]: 0/1382 cut-off events. [2022-07-19 21:21:18,822 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-19 21:21:18,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1999 conditions, 1382 events. 0/1382 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4544 event pairs, 0 based on Foata normal form. 4/1386 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-07-19 21:21:18,824 INFO L132 encePairwiseOnDemand]: 1054/1060 looper letters, 48 selfloop transitions, 21 changer transitions 0/895 dead transitions. [2022-07-19 21:21:18,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 958 places, 895 transitions, 2184 flow [2022-07-19 21:21:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:21:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:21:18,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17650 transitions. [2022-07-19 21:21:18,832 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7929020664869721 [2022-07-19 21:21:18,832 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17650 transitions. [2022-07-19 21:21:18,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17650 transitions. [2022-07-19 21:21:18,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:18,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17650 transitions. [2022-07-19 21:21:18,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 840.4761904761905) internal successors, (17650), 21 states have internal predecessors, (17650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:18,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1060.0) internal successors, (23320), 22 states have internal predecessors, (23320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:18,857 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1060.0) internal successors, (23320), 22 states have internal predecessors, (23320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:18,857 INFO L186 Difference]: Start difference. First operand has 938 places, 871 transitions, 1938 flow. Second operand 21 states and 17650 transitions. [2022-07-19 21:21:18,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 958 places, 895 transitions, 2184 flow [2022-07-19 21:21:18,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 957 places, 895 transitions, 2170 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:18,867 INFO L242 Difference]: Finished difference. Result has 962 places, 884 transitions, 2062 flow [2022-07-19 21:21:18,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=937, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2062, PETRI_PLACES=962, PETRI_TRANSITIONS=884} [2022-07-19 21:21:18,867 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 25 predicate places. [2022-07-19 21:21:18,867 INFO L495 AbstractCegarLoop]: Abstraction has has 962 places, 884 transitions, 2062 flow [2022-07-19 21:21:18,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 839.6111111111111) internal successors, (15113), 18 states have internal predecessors, (15113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:18,869 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:18,869 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] [2022-07-19 21:21:18,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:19,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:19,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:19,083 INFO L85 PathProgramCache]: Analyzing trace with hash 280181955, now seen corresponding path program 1 times [2022-07-19 21:21:19,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:19,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706179442] [2022-07-19 21:21:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:19,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:19,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:19,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706179442] [2022-07-19 21:21:19,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706179442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:19,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598305627] [2022-07-19 21:21:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:19,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:19,193 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:19,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-07-19 21:21:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:21:19,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:20,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:20,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598305627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:20,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:20,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:21:20,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295490370] [2022-07-19 21:21:20,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:20,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:21:20,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:21:20,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:21:20,202 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-19 21:21:20,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 962 places, 884 transitions, 2062 flow. Second operand has 34 states, 34 states have (on average 839.7941176470588) internal successors, (28553), 34 states have internal predecessors, (28553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:20,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:20,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-19 21:21:20,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:21,422 INFO L129 PetriNetUnfolder]: 0/1294 cut-off events. [2022-07-19 21:21:21,422 INFO L130 PetriNetUnfolder]: For 681/681 co-relation queries the response was YES. [2022-07-19 21:21:21,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 1294 events. 0/1294 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3982 event pairs, 0 based on Foata normal form. 8/1302 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-19 21:21:21,425 INFO L132 encePairwiseOnDemand]: 1054/1060 looper letters, 64 selfloop transitions, 45 changer transitions 0/935 dead transitions. [2022-07-19 21:21:21,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 935 transitions, 2596 flow [2022-07-19 21:21:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:21:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:21:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 37782 transitions. [2022-07-19 21:21:21,442 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7920754716981132 [2022-07-19 21:21:21,442 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 37782 transitions. [2022-07-19 21:21:21,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 37782 transitions. [2022-07-19 21:21:21,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:21,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 37782 transitions. [2022-07-19 21:21:21,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 839.6) internal successors, (37782), 45 states have internal predecessors, (37782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:21,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1060.0) internal successors, (48760), 46 states have internal predecessors, (48760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:21,502 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1060.0) internal successors, (48760), 46 states have internal predecessors, (48760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:21,503 INFO L186 Difference]: Start difference. First operand has 962 places, 884 transitions, 2062 flow. Second operand 45 states and 37782 transitions. [2022-07-19 21:21:21,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 935 transitions, 2596 flow [2022-07-19 21:21:21,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1000 places, 935 transitions, 2556 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:21,516 INFO L242 Difference]: Finished difference. Result has 1009 places, 909 transitions, 2340 flow [2022-07-19 21:21:21,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=956, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2340, PETRI_PLACES=1009, PETRI_TRANSITIONS=909} [2022-07-19 21:21:21,517 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 72 predicate places. [2022-07-19 21:21:21,517 INFO L495 AbstractCegarLoop]: Abstraction has has 1009 places, 909 transitions, 2340 flow [2022-07-19 21:21:21,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 839.7941176470588) internal successors, (28553), 34 states have internal predecessors, (28553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:21,520 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:21,520 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:21,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:21,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:21,735 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:21,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1399032503, now seen corresponding path program 1 times [2022-07-19 21:21:21,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:21,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4504960] [2022-07-19 21:21:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:21,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:22,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:22,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4504960] [2022-07-19 21:21:22,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4504960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:22,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624301922] [2022-07-19 21:21:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:22,052 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:22,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-07-19 21:21:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:22,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:21:22,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:22,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624301922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:23,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:23,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:21:23,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637025006] [2022-07-19 21:21:23,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:23,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:21:23,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:21:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:21:23,713 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-19 21:21:23,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1009 places, 909 transitions, 2340 flow. Second operand has 66 states, 66 states have (on average 839.8939393939394) internal successors, (55433), 66 states have internal predecessors, (55433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:23,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:23,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-19 21:21:23,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:25,854 INFO L129 PetriNetUnfolder]: 0/1118 cut-off events. [2022-07-19 21:21:25,854 INFO L130 PetriNetUnfolder]: For 2103/2103 co-relation queries the response was YES. [2022-07-19 21:21:25,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1914 conditions, 1118 events. 0/1118 cut-off events. For 2103/2103 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2835 event pairs, 0 based on Foata normal form. 16/1134 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2022-07-19 21:21:25,856 INFO L132 encePairwiseOnDemand]: 1055/1060 looper letters, 93 selfloop transitions, 91 changer transitions 0/1000 dead transitions. [2022-07-19 21:21:25,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1090 places, 1000 transitions, 3462 flow [2022-07-19 21:21:25,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:21:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:21:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 78041 transitions. [2022-07-19 21:21:25,890 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916514505984987 [2022-07-19 21:21:25,891 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 78041 transitions. [2022-07-19 21:21:25,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 78041 transitions. [2022-07-19 21:21:25,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:25,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 78041 transitions. [2022-07-19 21:21:25,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 839.1505376344086) internal successors, (78041), 93 states have internal predecessors, (78041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:26,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1060.0) internal successors, (99640), 94 states have internal predecessors, (99640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:26,021 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1060.0) internal successors, (99640), 94 states have internal predecessors, (99640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:26,022 INFO L186 Difference]: Start difference. First operand has 1009 places, 909 transitions, 2340 flow. Second operand 93 states and 78041 transitions. [2022-07-19 21:21:26,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1090 places, 1000 transitions, 3462 flow [2022-07-19 21:21:26,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1057 places, 1000 transitions, 3213 flow, removed 25 selfloop flow, removed 33 redundant places. [2022-07-19 21:21:26,035 INFO L242 Difference]: Finished difference. Result has 1057 places, 943 transitions, 2703 flow [2022-07-19 21:21:26,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=965, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=2703, PETRI_PLACES=1057, PETRI_TRANSITIONS=943} [2022-07-19 21:21:26,036 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 120 predicate places. [2022-07-19 21:21:26,036 INFO L495 AbstractCegarLoop]: Abstraction has has 1057 places, 943 transitions, 2703 flow [2022-07-19 21:21:26,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 839.8939393939394) internal successors, (55433), 66 states have internal predecessors, (55433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:26,042 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:26,042 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:26,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:26,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:26,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:26,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1478585189, now seen corresponding path program 1 times [2022-07-19 21:21:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:26,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791804583] [2022-07-19 21:21:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:26,286 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:21:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:26,352 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:21:26,352 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:21:26,352 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:21:26,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:21:26,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-07-19 21:21:26,353 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:21:26,353 WARN L231 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:21:26,353 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2022-07-19 21:21:26,405 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:21:26,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 966 places, 1093 transitions, 3271 flow [2022-07-19 21:21:27,463 INFO L129 PetriNetUnfolder]: 314/2204 cut-off events. [2022-07-19 21:21:27,464 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-19 21:21:27,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 2204 events. 314/2204 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8097 event pairs, 0 based on Foata normal form. 0/1826 useless extension candidates. Maximal degree in co-relation 2663. Up to 64 conditions per place. [2022-07-19 21:21:27,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 966 places, 1093 transitions, 3271 flow [2022-07-19 21:21:27,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 966 places, 1093 transitions, 3271 flow [2022-07-19 21:21:27,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:21:27,601 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:21:27,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:21:27,604 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-19 21:21:27,604 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:21:27,604 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:27,605 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] [2022-07-19 21:21:27,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:27,605 INFO L85 PathProgramCache]: Analyzing trace with hash 58051426, now seen corresponding path program 1 times [2022-07-19 21:21:27,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:27,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045086455] [2022-07-19 21:21:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:27,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:27,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045086455] [2022-07-19 21:21:27,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045086455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:27,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:27,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:21:27,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433485349] [2022-07-19 21:21:27,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:27,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:21:27,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:27,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:21:27,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:21:27,628 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 864 out of 1093 [2022-07-19 21:21:27,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 966 places, 1093 transitions, 3271 flow. Second operand has 3 states, 3 states have (on average 865.0) internal successors, (2595), 3 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:27,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:27,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 864 of 1093 [2022-07-19 21:21:27,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:28,731 INFO L129 PetriNetUnfolder]: 0/1836 cut-off events. [2022-07-19 21:21:28,732 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-19 21:21:28,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 1836 events. 0/1836 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7539 event pairs, 0 based on Foata normal form. 16733/18507 useless extension candidates. Maximal degree in co-relation 0. Up to 186 conditions per place. [2022-07-19 21:21:28,736 INFO L132 encePairwiseOnDemand]: 900/1093 looper letters, 40 selfloop transitions, 2 changer transitions 11/906 dead transitions. [2022-07-19 21:21:28,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 906 transitions, 2981 flow [2022-07-19 21:21:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:21:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:21:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2832 transitions. [2022-07-19 21:21:28,739 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8636779505946935 [2022-07-19 21:21:28,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2832 transitions. [2022-07-19 21:21:28,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2832 transitions. [2022-07-19 21:21:28,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:28,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2832 transitions. [2022-07-19 21:21:28,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 944.0) internal successors, (2832), 3 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:28,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1093.0) internal successors, (4372), 4 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:28,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1093.0) internal successors, (4372), 4 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:28,744 INFO L186 Difference]: Start difference. First operand has 966 places, 1093 transitions, 3271 flow. Second operand 3 states and 2832 transitions. [2022-07-19 21:21:28,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 906 transitions, 2981 flow [2022-07-19 21:21:28,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 967 places, 906 transitions, 2051 flow, removed 465 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:28,762 INFO L242 Difference]: Finished difference. Result has 968 places, 892 transitions, 1949 flow [2022-07-19 21:21:28,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=965, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=900, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1949, PETRI_PLACES=968, PETRI_TRANSITIONS=892} [2022-07-19 21:21:28,763 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 2 predicate places. [2022-07-19 21:21:28,763 INFO L495 AbstractCegarLoop]: Abstraction has has 968 places, 892 transitions, 1949 flow [2022-07-19 21:21:28,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 865.0) internal successors, (2595), 3 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:28,763 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:28,763 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] [2022-07-19 21:21:28,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-07-19 21:21:28,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash -859713674, now seen corresponding path program 1 times [2022-07-19 21:21:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:28,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770754465] [2022-07-19 21:21:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:28,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:28,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770754465] [2022-07-19 21:21:28,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770754465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368939599] [2022-07-19 21:21:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:28,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:28,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:28,797 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:28,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-07-19 21:21:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:21:29,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:29,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:29,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368939599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:29,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:29,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:21:29,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306548286] [2022-07-19 21:21:29,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:29,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:21:29,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:29,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:21:29,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:21:29,720 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-19 21:21:29,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 968 places, 892 transitions, 1949 flow. Second operand has 10 states, 10 states have (on average 865.3) internal successors, (8653), 10 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:29,723 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:29,723 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-19 21:21:29,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:30,662 INFO L129 PetriNetUnfolder]: 0/1473 cut-off events. [2022-07-19 21:21:30,663 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-19 21:21:30,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1882 conditions, 1473 events. 0/1473 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5031 event pairs, 0 based on Foata normal form. 2/1475 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-07-19 21:21:30,665 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 41 selfloop transitions, 9 changer transitions 0/902 dead transitions. [2022-07-19 21:21:30,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 965 places, 902 transitions, 2071 flow [2022-07-19 21:21:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7819 transitions. [2022-07-19 21:21:30,669 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7948561553319101 [2022-07-19 21:21:30,669 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7819 transitions. [2022-07-19 21:21:30,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7819 transitions. [2022-07-19 21:21:30,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:30,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7819 transitions. [2022-07-19 21:21:30,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 868.7777777777778) internal successors, (7819), 9 states have internal predecessors, (7819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1093.0) internal successors, (10930), 10 states have internal predecessors, (10930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,680 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1093.0) internal successors, (10930), 10 states have internal predecessors, (10930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,680 INFO L186 Difference]: Start difference. First operand has 968 places, 892 transitions, 1949 flow. Second operand 9 states and 7819 transitions. [2022-07-19 21:21:30,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 965 places, 902 transitions, 2071 flow [2022-07-19 21:21:30,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 964 places, 902 transitions, 2069 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:30,689 INFO L242 Difference]: Finished difference. Result has 967 places, 898 transitions, 1997 flow [2022-07-19 21:21:30,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=956, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=886, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1997, PETRI_PLACES=967, PETRI_TRANSITIONS=898} [2022-07-19 21:21:30,690 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 1 predicate places. [2022-07-19 21:21:30,690 INFO L495 AbstractCegarLoop]: Abstraction has has 967 places, 898 transitions, 1997 flow [2022-07-19 21:21:30,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 865.3) internal successors, (8653), 10 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:30,692 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:30,692 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] [2022-07-19 21:21:30,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:30,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-07-19 21:21:30,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash 24168801, now seen corresponding path program 1 times [2022-07-19 21:21:30,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:30,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993881094] [2022-07-19 21:21:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:30,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:30,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993881094] [2022-07-19 21:21:30,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993881094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:30,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391167736] [2022-07-19 21:21:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:30,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:30,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:30,951 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:30,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-07-19 21:21:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:31,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:21:31,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:31,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:31,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391167736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:31,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:31,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:21:31,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280959212] [2022-07-19 21:21:31,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:31,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:21:31,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:21:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:31,852 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-19 21:21:31,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 967 places, 898 transitions, 1997 flow. Second operand has 18 states, 18 states have (on average 865.6111111111111) internal successors, (15581), 18 states have internal predecessors, (15581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:31,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:31,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-19 21:21:31,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:32,854 INFO L129 PetriNetUnfolder]: 0/1429 cut-off events. [2022-07-19 21:21:32,854 INFO L130 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-07-19 21:21:32,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2067 conditions, 1429 events. 0/1429 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4736 event pairs, 0 based on Foata normal form. 4/1433 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-07-19 21:21:32,857 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 49 selfloop transitions, 21 changer transitions 0/922 dead transitions. [2022-07-19 21:21:32,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 987 places, 922 transitions, 2245 flow [2022-07-19 21:21:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:21:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:21:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18197 transitions. [2022-07-19 21:21:32,866 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927939702871084 [2022-07-19 21:21:32,866 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18197 transitions. [2022-07-19 21:21:32,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18197 transitions. [2022-07-19 21:21:32,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:32,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18197 transitions. [2022-07-19 21:21:32,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 866.5238095238095) internal successors, (18197), 21 states have internal predecessors, (18197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:32,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1093.0) internal successors, (24046), 22 states have internal predecessors, (24046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:32,894 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1093.0) internal successors, (24046), 22 states have internal predecessors, (24046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:32,895 INFO L186 Difference]: Start difference. First operand has 967 places, 898 transitions, 1997 flow. Second operand 21 states and 18197 transitions. [2022-07-19 21:21:32,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 987 places, 922 transitions, 2245 flow [2022-07-19 21:21:32,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 986 places, 922 transitions, 2231 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:32,907 INFO L242 Difference]: Finished difference. Result has 991 places, 911 transitions, 2121 flow [2022-07-19 21:21:32,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=966, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=887, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2121, PETRI_PLACES=991, PETRI_TRANSITIONS=911} [2022-07-19 21:21:32,908 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 25 predicate places. [2022-07-19 21:21:32,908 INFO L495 AbstractCegarLoop]: Abstraction has has 991 places, 911 transitions, 2121 flow [2022-07-19 21:21:32,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 865.6111111111111) internal successors, (15581), 18 states have internal predecessors, (15581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:32,909 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:32,909 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] [2022-07-19 21:21:32,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:33,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-07-19 21:21:33,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash -200556221, now seen corresponding path program 1 times [2022-07-19 21:21:33,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:33,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527723639] [2022-07-19 21:21:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:33,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:33,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:33,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527723639] [2022-07-19 21:21:33,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527723639] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:33,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131340199] [2022-07-19 21:21:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:33,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:33,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:33,236 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:33,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-07-19 21:21:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:21:34,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:34,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:34,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131340199] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:34,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:34,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:21:34,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888759643] [2022-07-19 21:21:34,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:34,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:21:34,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:21:34,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:21:34,330 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-19 21:21:34,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 991 places, 911 transitions, 2121 flow. Second operand has 34 states, 34 states have (on average 865.7941176470588) internal successors, (29437), 34 states have internal predecessors, (29437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:34,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:34,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-19 21:21:34,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:35,529 INFO L129 PetriNetUnfolder]: 0/1341 cut-off events. [2022-07-19 21:21:35,530 INFO L130 PetriNetUnfolder]: For 708/708 co-relation queries the response was YES. [2022-07-19 21:21:35,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2166 conditions, 1341 events. 0/1341 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4138 event pairs, 0 based on Foata normal form. 8/1349 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-19 21:21:35,532 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 65 selfloop transitions, 45 changer transitions 0/962 dead transitions. [2022-07-19 21:21:35,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 962 transitions, 2657 flow [2022-07-19 21:21:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:21:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:21:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 38953 transitions. [2022-07-19 21:21:35,549 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7919690962691878 [2022-07-19 21:21:35,549 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 38953 transitions. [2022-07-19 21:21:35,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 38953 transitions. [2022-07-19 21:21:35,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:35,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 38953 transitions. [2022-07-19 21:21:35,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 865.6222222222223) internal successors, (38953), 45 states have internal predecessors, (38953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1093.0) internal successors, (50278), 46 states have internal predecessors, (50278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,611 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1093.0) internal successors, (50278), 46 states have internal predecessors, (50278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,611 INFO L186 Difference]: Start difference. First operand has 991 places, 911 transitions, 2121 flow. Second operand 45 states and 38953 transitions. [2022-07-19 21:21:35,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 962 transitions, 2657 flow [2022-07-19 21:21:35,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1029 places, 962 transitions, 2617 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:35,624 INFO L242 Difference]: Finished difference. Result has 1038 places, 936 transitions, 2399 flow [2022-07-19 21:21:35,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=985, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2399, PETRI_PLACES=1038, PETRI_TRANSITIONS=936} [2022-07-19 21:21:35,625 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 72 predicate places. [2022-07-19 21:21:35,625 INFO L495 AbstractCegarLoop]: Abstraction has has 1038 places, 936 transitions, 2399 flow [2022-07-19 21:21:35,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 865.7941176470588) internal successors, (29437), 34 states have internal predecessors, (29437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:35,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:35,628 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:35,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-07-19 21:21:35,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-07-19 21:21:35,844 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1160763081, now seen corresponding path program 1 times [2022-07-19 21:21:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:35,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649625668] [2022-07-19 21:21:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:36,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:36,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649625668] [2022-07-19 21:21:36,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649625668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:36,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492484275] [2022-07-19 21:21:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:36,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:36,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:36,183 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:36,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-07-19 21:21:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:37,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:21:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:37,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:37,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492484275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:37,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:37,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:21:37,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206288222] [2022-07-19 21:21:37,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:37,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:21:37,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:37,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:21:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:21:37,908 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-19 21:21:37,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1038 places, 936 transitions, 2399 flow. Second operand has 66 states, 66 states have (on average 865.8939393939394) internal successors, (57149), 66 states have internal predecessors, (57149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:37,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:37,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-19 21:21:37,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:39,679 INFO L129 PetriNetUnfolder]: 0/1165 cut-off events. [2022-07-19 21:21:39,679 INFO L130 PetriNetUnfolder]: For 2224/2224 co-relation queries the response was YES. [2022-07-19 21:21:39,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2004 conditions, 1165 events. 0/1165 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2986 event pairs, 0 based on Foata normal form. 16/1181 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2022-07-19 21:21:39,681 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 97 selfloop transitions, 93 changer transitions 0/1042 dead transitions. [2022-07-19 21:21:39,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1130 places, 1042 transitions, 3627 flow [2022-07-19 21:21:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:21:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:21:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 80465 transitions. [2022-07-19 21:21:39,718 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.791596572519159 [2022-07-19 21:21:39,718 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 80465 transitions. [2022-07-19 21:21:39,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 80465 transitions. [2022-07-19 21:21:39,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:39,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 80465 transitions. [2022-07-19 21:21:39,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 865.2150537634409) internal successors, (80465), 93 states have internal predecessors, (80465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:39,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1093.0) internal successors, (102742), 94 states have internal predecessors, (102742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:39,845 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1093.0) internal successors, (102742), 94 states have internal predecessors, (102742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:39,845 INFO L186 Difference]: Start difference. First operand has 1038 places, 936 transitions, 2399 flow. Second operand 93 states and 80465 transitions. [2022-07-19 21:21:39,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1130 places, 1042 transitions, 3627 flow [2022-07-19 21:21:39,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1112 places, 1042 transitions, 3539 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-19 21:21:39,862 INFO L242 Difference]: Finished difference. Result has 1129 places, 985 transitions, 3033 flow [2022-07-19 21:21:39,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=1020, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3033, PETRI_PLACES=1129, PETRI_TRANSITIONS=985} [2022-07-19 21:21:39,863 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 163 predicate places. [2022-07-19 21:21:39,863 INFO L495 AbstractCegarLoop]: Abstraction has has 1129 places, 985 transitions, 3033 flow [2022-07-19 21:21:39,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 865.8939393939394) internal successors, (57149), 66 states have internal predecessors, (57149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:39,869 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:39,869 INFO L200 CegarLoopForPetriNet]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:39,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:40,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-07-19 21:21:40,079 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:40,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash 440356055, now seen corresponding path program 1 times [2022-07-19 21:21:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:40,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340228044] [2022-07-19 21:21:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:40,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:40,120 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:21:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:21:40,263 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:21:40,264 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:21:40,264 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:21:40,264 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:21:40,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-07-19 21:21:40,264 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:21:40,264 WARN L231 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:21:40,265 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2022-07-19 21:21:40,320 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:21:40,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 995 places, 1126 transitions, 3404 flow [2022-07-19 21:21:41,280 INFO L129 PetriNetUnfolder]: 324/2273 cut-off events. [2022-07-19 21:21:41,280 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-19 21:21:41,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 2273 events. 324/2273 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8327 event pairs, 0 based on Foata normal form. 0/1883 useless extension candidates. Maximal degree in co-relation 2766. Up to 66 conditions per place. [2022-07-19 21:21:41,469 INFO L82 GeneralOperation]: Start removeDead. Operand has 995 places, 1126 transitions, 3404 flow [2022-07-19 21:21:41,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 995 places, 1126 transitions, 3404 flow [2022-07-19 21:21:41,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:21:41,553 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:21:41,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:21:41,556 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-19 21:21:41,556 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:21:41,557 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:41,557 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] [2022-07-19 21:21:41,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2079757282, now seen corresponding path program 1 times [2022-07-19 21:21:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:41,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650872298] [2022-07-19 21:21:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:41,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:41,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:41,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650872298] [2022-07-19 21:21:41,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650872298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:41,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:41,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:21:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278802244] [2022-07-19 21:21:41,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:41,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:21:41,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:21:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:21:41,580 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 890 out of 1126 [2022-07-19 21:21:41,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 995 places, 1126 transitions, 3404 flow. Second operand has 3 states, 3 states have (on average 891.0) internal successors, (2673), 3 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:41,581 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:41,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 890 of 1126 [2022-07-19 21:21:41,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:42,734 INFO L129 PetriNetUnfolder]: 0/1894 cut-off events. [2022-07-19 21:21:42,734 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-19 21:21:42,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2716 conditions, 1894 events. 0/1894 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7779 event pairs, 0 based on Foata normal form. 17848/19678 useless extension candidates. Maximal degree in co-relation 0. Up to 192 conditions per place. [2022-07-19 21:21:42,737 INFO L132 encePairwiseOnDemand]: 927/1126 looper letters, 41 selfloop transitions, 2 changer transitions 11/933 dead transitions. [2022-07-19 21:21:42,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 933 transitions, 3104 flow [2022-07-19 21:21:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:21:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:21:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2917 transitions. [2022-07-19 21:21:42,739 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8635287152161042 [2022-07-19 21:21:42,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2917 transitions. [2022-07-19 21:21:42,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2917 transitions. [2022-07-19 21:21:42,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:42,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2917 transitions. [2022-07-19 21:21:42,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 972.3333333333334) internal successors, (2917), 3 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:42,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 4 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:42,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 4 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:42,743 INFO L186 Difference]: Start difference. First operand has 995 places, 1126 transitions, 3404 flow. Second operand 3 states and 2917 transitions. [2022-07-19 21:21:42,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 933 transitions, 3104 flow [2022-07-19 21:21:42,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 996 places, 933 transitions, 2112 flow, removed 496 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:42,759 INFO L242 Difference]: Finished difference. Result has 997 places, 919 transitions, 2008 flow [2022-07-19 21:21:42,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=994, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=927, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2008, PETRI_PLACES=997, PETRI_TRANSITIONS=919} [2022-07-19 21:21:42,759 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 2 predicate places. [2022-07-19 21:21:42,759 INFO L495 AbstractCegarLoop]: Abstraction has has 997 places, 919 transitions, 2008 flow [2022-07-19 21:21:42,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 891.0) internal successors, (2673), 3 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:42,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:42,760 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] [2022-07-19 21:21:42,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-07-19 21:21:42,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:42,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash -820602922, now seen corresponding path program 1 times [2022-07-19 21:21:42,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:42,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567544506] [2022-07-19 21:21:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:42,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:42,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567544506] [2022-07-19 21:21:42,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567544506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:42,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177082843] [2022-07-19 21:21:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:42,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:42,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:42,788 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:42,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-07-19 21:21:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:43,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:21:43,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:43,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:43,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177082843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:43,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:43,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:21:43,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229338748] [2022-07-19 21:21:43,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:43,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:21:43,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:43,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:21:43,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:21:43,698 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-19 21:21:43,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 997 places, 919 transitions, 2008 flow. Second operand has 10 states, 10 states have (on average 891.3) internal successors, (8913), 10 states have internal predecessors, (8913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:43,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:43,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-19 21:21:43,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:44,674 INFO L129 PetriNetUnfolder]: 0/1520 cut-off events. [2022-07-19 21:21:44,675 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-19 21:21:44,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 1520 events. 0/1520 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5172 event pairs, 0 based on Foata normal form. 2/1522 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-07-19 21:21:44,678 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 42 selfloop transitions, 9 changer transitions 0/929 dead transitions. [2022-07-19 21:21:44,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 994 places, 929 transitions, 2132 flow [2022-07-19 21:21:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8054 transitions. [2022-07-19 21:21:44,682 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7947503453720149 [2022-07-19 21:21:44,683 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8054 transitions. [2022-07-19 21:21:44,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8054 transitions. [2022-07-19 21:21:44,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:44,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8054 transitions. [2022-07-19 21:21:44,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 894.8888888888889) internal successors, (8054), 9 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:44,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1126.0) internal successors, (11260), 10 states have internal predecessors, (11260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:44,694 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1126.0) internal successors, (11260), 10 states have internal predecessors, (11260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:44,694 INFO L186 Difference]: Start difference. First operand has 997 places, 919 transitions, 2008 flow. Second operand 9 states and 8054 transitions. [2022-07-19 21:21:44,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 994 places, 929 transitions, 2132 flow [2022-07-19 21:21:44,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 929 transitions, 2130 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:44,704 INFO L242 Difference]: Finished difference. Result has 996 places, 925 transitions, 2056 flow [2022-07-19 21:21:44,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=985, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2056, PETRI_PLACES=996, PETRI_TRANSITIONS=925} [2022-07-19 21:21:44,716 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 1 predicate places. [2022-07-19 21:21:44,717 INFO L495 AbstractCegarLoop]: Abstraction has has 996 places, 925 transitions, 2056 flow [2022-07-19 21:21:44,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 891.3) internal successors, (8913), 10 states have internal predecessors, (8913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:44,718 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:44,718 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] [2022-07-19 21:21:44,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:44,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:44,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:44,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:44,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2092468609, now seen corresponding path program 1 times [2022-07-19 21:21:44,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:44,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61070303] [2022-07-19 21:21:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:44,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:45,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:45,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61070303] [2022-07-19 21:21:45,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61070303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:45,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894375080] [2022-07-19 21:21:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:45,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:45,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:45,028 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:45,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-07-19 21:21:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:45,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:21:45,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:45,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:45,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894375080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:45,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:45,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:21:45,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46474220] [2022-07-19 21:21:45,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:45,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:21:45,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:21:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:21:45,969 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-19 21:21:45,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 996 places, 925 transitions, 2056 flow. Second operand has 18 states, 18 states have (on average 891.6111111111111) internal successors, (16049), 18 states have internal predecessors, (16049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:45,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:45,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-19 21:21:45,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:47,021 INFO L129 PetriNetUnfolder]: 0/1476 cut-off events. [2022-07-19 21:21:47,021 INFO L130 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-07-19 21:21:47,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 1476 events. 0/1476 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4910 event pairs, 0 based on Foata normal form. 4/1480 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-07-19 21:21:47,024 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 50 selfloop transitions, 21 changer transitions 0/949 dead transitions. [2022-07-19 21:21:47,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1016 places, 949 transitions, 2306 flow [2022-07-19 21:21:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:21:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:21:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18744 transitions. [2022-07-19 21:21:47,032 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926922100989596 [2022-07-19 21:21:47,032 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18744 transitions. [2022-07-19 21:21:47,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18744 transitions. [2022-07-19 21:21:47,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:47,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18744 transitions. [2022-07-19 21:21:47,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 892.5714285714286) internal successors, (18744), 21 states have internal predecessors, (18744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:47,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1126.0) internal successors, (24772), 22 states have internal predecessors, (24772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:47,056 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1126.0) internal successors, (24772), 22 states have internal predecessors, (24772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:47,056 INFO L186 Difference]: Start difference. First operand has 996 places, 925 transitions, 2056 flow. Second operand 21 states and 18744 transitions. [2022-07-19 21:21:47,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1016 places, 949 transitions, 2306 flow [2022-07-19 21:21:47,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1015 places, 949 transitions, 2292 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:47,066 INFO L242 Difference]: Finished difference. Result has 1020 places, 938 transitions, 2180 flow [2022-07-19 21:21:47,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=995, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2180, PETRI_PLACES=1020, PETRI_TRANSITIONS=938} [2022-07-19 21:21:47,067 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 25 predicate places. [2022-07-19 21:21:47,067 INFO L495 AbstractCegarLoop]: Abstraction has has 1020 places, 938 transitions, 2180 flow [2022-07-19 21:21:47,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 891.6111111111111) internal successors, (16049), 18 states have internal predecessors, (16049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:47,068 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:47,068 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] [2022-07-19 21:21:47,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-07-19 21:21:47,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:47,283 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:47,283 INFO L85 PathProgramCache]: Analyzing trace with hash 594366691, now seen corresponding path program 1 times [2022-07-19 21:21:47,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:47,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637018903] [2022-07-19 21:21:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:47,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:47,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637018903] [2022-07-19 21:21:47,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637018903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658245249] [2022-07-19 21:21:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:47,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:47,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:47,389 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:47,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-07-19 21:21:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:48,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:21:48,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:48,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:48,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658245249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:48,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:48,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:21:48,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580412905] [2022-07-19 21:21:48,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:48,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:21:48,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:48,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:21:48,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:21:48,617 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-19 21:21:48,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1020 places, 938 transitions, 2180 flow. Second operand has 34 states, 34 states have (on average 891.7941176470588) internal successors, (30321), 34 states have internal predecessors, (30321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:48,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:48,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-19 21:21:48,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:49,986 INFO L129 PetriNetUnfolder]: 0/1388 cut-off events. [2022-07-19 21:21:49,986 INFO L130 PetriNetUnfolder]: For 735/735 co-relation queries the response was YES. [2022-07-19 21:21:49,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2243 conditions, 1388 events. 0/1388 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4321 event pairs, 0 based on Foata normal form. 8/1396 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-19 21:21:49,990 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 66 selfloop transitions, 45 changer transitions 0/989 dead transitions. [2022-07-19 21:21:49,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1064 places, 989 transitions, 2718 flow [2022-07-19 21:21:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:21:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:21:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 40124 transitions. [2022-07-19 21:21:50,010 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918689559897375 [2022-07-19 21:21:50,011 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 40124 transitions. [2022-07-19 21:21:50,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 40124 transitions. [2022-07-19 21:21:50,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:50,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 40124 transitions. [2022-07-19 21:21:50,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 891.6444444444444) internal successors, (40124), 45 states have internal predecessors, (40124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:50,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1126.0) internal successors, (51796), 46 states have internal predecessors, (51796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:50,076 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1126.0) internal successors, (51796), 46 states have internal predecessors, (51796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:50,076 INFO L186 Difference]: Start difference. First operand has 1020 places, 938 transitions, 2180 flow. Second operand 45 states and 40124 transitions. [2022-07-19 21:21:50,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1064 places, 989 transitions, 2718 flow [2022-07-19 21:21:50,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1058 places, 989 transitions, 2678 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:50,091 INFO L242 Difference]: Finished difference. Result has 1067 places, 963 transitions, 2458 flow [2022-07-19 21:21:50,092 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=1014, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2458, PETRI_PLACES=1067, PETRI_TRANSITIONS=963} [2022-07-19 21:21:50,092 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 72 predicate places. [2022-07-19 21:21:50,092 INFO L495 AbstractCegarLoop]: Abstraction has has 1067 places, 963 transitions, 2458 flow [2022-07-19 21:21:50,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 891.7941176470588) internal successors, (30321), 34 states have internal predecessors, (30321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:50,095 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:50,095 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:50,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:50,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:50,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash 393533399, now seen corresponding path program 1 times [2022-07-19 21:21:50,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:50,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859662826] [2022-07-19 21:21:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:50,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:50,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:50,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859662826] [2022-07-19 21:21:50,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859662826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:50,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173688014] [2022-07-19 21:21:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:50,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:50,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:50,629 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:50,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-07-19 21:21:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:21:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:51,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:52,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173688014] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:52,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:52,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:21:52,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595573827] [2022-07-19 21:21:52,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:52,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:21:52,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:21:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:21:52,431 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-19 21:21:52,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1067 places, 963 transitions, 2458 flow. Second operand has 66 states, 66 states have (on average 891.8939393939394) internal successors, (58865), 66 states have internal predecessors, (58865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:52,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:52,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-19 21:21:52,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:54,175 INFO L129 PetriNetUnfolder]: 0/1212 cut-off events. [2022-07-19 21:21:54,175 INFO L130 PetriNetUnfolder]: For 2345/2345 co-relation queries the response was YES. [2022-07-19 21:21:54,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 1212 events. 0/1212 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3158 event pairs, 0 based on Foata normal form. 16/1228 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-19 21:21:54,177 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 98 selfloop transitions, 93 changer transitions 0/1069 dead transitions. [2022-07-19 21:21:54,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1159 places, 1069 transitions, 3688 flow [2022-07-19 21:21:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:21:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:21:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 82884 transitions. [2022-07-19 21:21:54,212 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7914971638113791 [2022-07-19 21:21:54,212 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 82884 transitions. [2022-07-19 21:21:54,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 82884 transitions. [2022-07-19 21:21:54,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:54,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 82884 transitions. [2022-07-19 21:21:54,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 891.2258064516129) internal successors, (82884), 93 states have internal predecessors, (82884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:54,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1126.0) internal successors, (105844), 94 states have internal predecessors, (105844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:54,340 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1126.0) internal successors, (105844), 94 states have internal predecessors, (105844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:54,340 INFO L186 Difference]: Start difference. First operand has 1067 places, 963 transitions, 2458 flow. Second operand 93 states and 82884 transitions. [2022-07-19 21:21:54,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1159 places, 1069 transitions, 3688 flow [2022-07-19 21:21:54,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1141 places, 1069 transitions, 3600 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-19 21:21:54,357 INFO L242 Difference]: Finished difference. Result has 1158 places, 1012 transitions, 3092 flow [2022-07-19 21:21:54,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=1049, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3092, PETRI_PLACES=1158, PETRI_TRANSITIONS=1012} [2022-07-19 21:21:54,358 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 163 predicate places. [2022-07-19 21:21:54,358 INFO L495 AbstractCegarLoop]: Abstraction has has 1158 places, 1012 transitions, 3092 flow [2022-07-19 21:21:54,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 891.8939393939394) internal successors, (58865), 66 states have internal predecessors, (58865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:54,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:54,365 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:54,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:54,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-07-19 21:21:54,586 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:21:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:54,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1540818559, now seen corresponding path program 1 times [2022-07-19 21:21:54,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:54,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285354562] [2022-07-19 21:21:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:54,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:55,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:55,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285354562] [2022-07-19 21:21:55,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285354562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:21:55,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65213880] [2022-07-19 21:21:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:55,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:55,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:55,634 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:21:55,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-07-19 21:21:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:56,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 21:21:56,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:56,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:21:58,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65213880] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:58,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:21:58,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-19 21:21:58,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007762127] [2022-07-19 21:21:58,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:58,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-19 21:21:58,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-19 21:21:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-19 21:21:58,554 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-19 21:21:58,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1158 places, 1012 transitions, 3092 flow. Second operand has 130 states, 130 states have (on average 891.9461538461538) internal successors, (115953), 130 states have internal predecessors, (115953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:58,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:58,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-19 21:21:58,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:00,901 INFO L129 PetriNetUnfolder]: 0/1190 cut-off events. [2022-07-19 21:22:00,902 INFO L130 PetriNetUnfolder]: For 1692/1692 co-relation queries the response was YES. [2022-07-19 21:22:00,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 1190 events. 0/1190 cut-off events. For 1692/1692 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3031 event pairs, 0 based on Foata normal form. 2/1192 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-19 21:22:00,918 INFO L132 encePairwiseOnDemand]: 1121/1126 looper letters, 99 selfloop transitions, 97 changer transitions 0/1064 dead transitions. [2022-07-19 21:22:00,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1245 places, 1064 transitions, 3872 flow [2022-07-19 21:22:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-19 21:22:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-07-19 21:22:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 88209 transitions. [2022-07-19 21:22:00,958 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912966252220248 [2022-07-19 21:22:00,958 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 88209 transitions. [2022-07-19 21:22:00,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 88209 transitions. [2022-07-19 21:22:00,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:00,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 88209 transitions. [2022-07-19 21:22:01,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 891.0) internal successors, (88209), 99 states have internal predecessors, (88209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:01,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 1126.0) internal successors, (112600), 100 states have internal predecessors, (112600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:01,097 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 1126.0) internal successors, (112600), 100 states have internal predecessors, (112600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:01,097 INFO L186 Difference]: Start difference. First operand has 1158 places, 1012 transitions, 3092 flow. Second operand 99 states and 88209 transitions. [2022-07-19 21:22:01,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1245 places, 1064 transitions, 3872 flow [2022-07-19 21:22:01,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1172 places, 1064 transitions, 3540 flow, removed 19 selfloop flow, removed 73 redundant places. [2022-07-19 21:22:01,117 INFO L242 Difference]: Finished difference. Result has 1172 places, 1004 transitions, 2970 flow [2022-07-19 21:22:01,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=1074, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=2970, PETRI_PLACES=1172, PETRI_TRANSITIONS=1004} [2022-07-19 21:22:01,118 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 177 predicate places. [2022-07-19 21:22:01,118 INFO L495 AbstractCegarLoop]: Abstraction has has 1172 places, 1004 transitions, 2970 flow [2022-07-19 21:22:01,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 891.9461538461538) internal successors, (115953), 130 states have internal predecessors, (115953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:01,129 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:01,129 INFO L200 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:01,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-07-19 21:22:01,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:01,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:01,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2144471914, now seen corresponding path program 1 times [2022-07-19 21:22:01,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:01,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303461782] [2022-07-19 21:22:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:01,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:01,386 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:22:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:01,460 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:22:01,460 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:22:01,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:22:01,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:22:01,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-07-19 21:22:01,461 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:01,461 WARN L231 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:22:01,461 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2022-07-19 21:22:01,506 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:22:01,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1024 places, 1159 transitions, 3539 flow [2022-07-19 21:22:02,627 INFO L129 PetriNetUnfolder]: 334/2342 cut-off events. [2022-07-19 21:22:02,628 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-19 21:22:02,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 2342 events. 334/2342 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8561 event pairs, 0 based on Foata normal form. 0/1940 useless extension candidates. Maximal degree in co-relation 2870. Up to 68 conditions per place. [2022-07-19 21:22:02,762 INFO L82 GeneralOperation]: Start removeDead. Operand has 1024 places, 1159 transitions, 3539 flow [2022-07-19 21:22:02,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1024 places, 1159 transitions, 3539 flow [2022-07-19 21:22:02,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:22:02,823 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:22:02,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:22:02,826 INFO L129 PetriNetUnfolder]: 3/73 cut-off events. [2022-07-19 21:22:02,826 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:22:02,826 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:02,827 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] [2022-07-19 21:22:02,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:02,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:02,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2064318686, now seen corresponding path program 1 times [2022-07-19 21:22:02,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:02,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587183093] [2022-07-19 21:22:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:02,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:02,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587183093] [2022-07-19 21:22:02,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587183093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:02,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:02,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:22:02,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812097813] [2022-07-19 21:22:02,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:02,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:22:02,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:02,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:22:02,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:22:02,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 916 out of 1159 [2022-07-19 21:22:02,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 1159 transitions, 3539 flow. Second operand has 3 states, 3 states have (on average 917.0) internal successors, (2751), 3 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:02,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:02,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 916 of 1159 [2022-07-19 21:22:02,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:04,102 INFO L129 PetriNetUnfolder]: 0/1952 cut-off events. [2022-07-19 21:22:04,102 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-19 21:22:04,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2816 conditions, 1952 events. 0/1952 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8083 event pairs, 0 based on Foata normal form. 18999/20885 useless extension candidates. Maximal degree in co-relation 0. Up to 198 conditions per place. [2022-07-19 21:22:04,106 INFO L132 encePairwiseOnDemand]: 954/1159 looper letters, 42 selfloop transitions, 2 changer transitions 11/960 dead transitions. [2022-07-19 21:22:04,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1025 places, 960 transitions, 3229 flow [2022-07-19 21:22:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:22:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:22:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3002 transitions. [2022-07-19 21:22:04,108 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8633879781420765 [2022-07-19 21:22:04,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3002 transitions. [2022-07-19 21:22:04,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3002 transitions. [2022-07-19 21:22:04,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:04,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3002 transitions. [2022-07-19 21:22:04,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1000.6666666666666) internal successors, (3002), 3 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:04,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1159.0) internal successors, (4636), 4 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:04,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1159.0) internal successors, (4636), 4 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:04,113 INFO L186 Difference]: Start difference. First operand has 1024 places, 1159 transitions, 3539 flow. Second operand 3 states and 3002 transitions. [2022-07-19 21:22:04,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1025 places, 960 transitions, 3229 flow [2022-07-19 21:22:04,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1025 places, 960 transitions, 2173 flow, removed 528 selfloop flow, removed 0 redundant places. [2022-07-19 21:22:04,127 INFO L242 Difference]: Finished difference. Result has 1026 places, 946 transitions, 2067 flow [2022-07-19 21:22:04,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=1023, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2067, PETRI_PLACES=1026, PETRI_TRANSITIONS=946} [2022-07-19 21:22:04,128 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 2 predicate places. [2022-07-19 21:22:04,128 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 946 transitions, 2067 flow [2022-07-19 21:22:04,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 917.0) internal successors, (2751), 3 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:04,129 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:04,129 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] [2022-07-19 21:22:04,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-07-19 21:22:04,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:04,130 INFO L85 PathProgramCache]: Analyzing trace with hash 410736534, now seen corresponding path program 1 times [2022-07-19 21:22:04,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:04,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979063589] [2022-07-19 21:22:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:04,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:04,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:04,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979063589] [2022-07-19 21:22:04,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979063589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:04,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026033458] [2022-07-19 21:22:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:04,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:04,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:04,159 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:04,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-07-19 21:22:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:05,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:22:05,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:05,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:05,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026033458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:05,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:05,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:22:05,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102640075] [2022-07-19 21:22:05,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:05,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:22:05,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:05,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:22:05,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:22:05,173 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-19 21:22:05,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1026 places, 946 transitions, 2067 flow. Second operand has 10 states, 10 states have (on average 917.3) internal successors, (9173), 10 states have internal predecessors, (9173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:05,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:05,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-19 21:22:05,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:06,055 INFO L129 PetriNetUnfolder]: 0/1567 cut-off events. [2022-07-19 21:22:06,055 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-07-19 21:22:06,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 1567 events. 0/1567 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5371 event pairs, 0 based on Foata normal form. 2/1569 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-07-19 21:22:06,058 INFO L132 encePairwiseOnDemand]: 1153/1159 looper letters, 43 selfloop transitions, 9 changer transitions 0/956 dead transitions. [2022-07-19 21:22:06,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1023 places, 956 transitions, 2193 flow [2022-07-19 21:22:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:22:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:22:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8289 transitions. [2022-07-19 21:22:06,062 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946505608283002 [2022-07-19 21:22:06,062 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8289 transitions. [2022-07-19 21:22:06,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8289 transitions. [2022-07-19 21:22:06,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:06,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8289 transitions. [2022-07-19 21:22:06,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 921.0) internal successors, (8289), 9 states have internal predecessors, (8289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:06,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1159.0) internal successors, (11590), 10 states have internal predecessors, (11590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:06,072 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1159.0) internal successors, (11590), 10 states have internal predecessors, (11590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:06,072 INFO L186 Difference]: Start difference. First operand has 1026 places, 946 transitions, 2067 flow. Second operand 9 states and 8289 transitions. [2022-07-19 21:22:06,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1023 places, 956 transitions, 2193 flow [2022-07-19 21:22:06,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1022 places, 956 transitions, 2191 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:06,082 INFO L242 Difference]: Finished difference. Result has 1025 places, 952 transitions, 2115 flow [2022-07-19 21:22:06,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=1014, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=940, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2115, PETRI_PLACES=1025, PETRI_TRANSITIONS=952} [2022-07-19 21:22:06,083 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 1 predicate places. [2022-07-19 21:22:06,083 INFO L495 AbstractCegarLoop]: Abstraction has has 1025 places, 952 transitions, 2115 flow [2022-07-19 21:22:06,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 917.3) internal successors, (9173), 10 states have internal predecessors, (9173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:06,084 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:06,084 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] [2022-07-19 21:22:06,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:06,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:06,300 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:06,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:06,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1249055297, now seen corresponding path program 1 times [2022-07-19 21:22:06,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:06,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594948953] [2022-07-19 21:22:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:06,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:06,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:06,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594948953] [2022-07-19 21:22:06,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594948953] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:06,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092932344] [2022-07-19 21:22:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:06,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:06,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:06,346 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:06,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-07-19 21:22:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:07,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:22:07,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:07,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:07,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092932344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:07,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:07,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:22:07,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121829945] [2022-07-19 21:22:07,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:07,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:22:07,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:07,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:22:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:22:07,360 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-19 21:22:07,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1025 places, 952 transitions, 2115 flow. Second operand has 18 states, 18 states have (on average 917.6111111111111) internal successors, (16517), 18 states have internal predecessors, (16517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:07,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:07,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-19 21:22:07,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:08,375 INFO L129 PetriNetUnfolder]: 0/1523 cut-off events. [2022-07-19 21:22:08,375 INFO L130 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-07-19 21:22:08,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 1523 events. 0/1523 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5054 event pairs, 0 based on Foata normal form. 4/1527 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-07-19 21:22:08,378 INFO L132 encePairwiseOnDemand]: 1153/1159 looper letters, 51 selfloop transitions, 21 changer transitions 0/976 dead transitions. [2022-07-19 21:22:08,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1045 places, 976 transitions, 2367 flow [2022-07-19 21:22:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:22:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:22:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19291 transitions. [2022-07-19 21:22:08,387 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.792596244710136 [2022-07-19 21:22:08,387 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19291 transitions. [2022-07-19 21:22:08,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19291 transitions. [2022-07-19 21:22:08,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:08,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19291 transitions. [2022-07-19 21:22:08,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 918.6190476190476) internal successors, (19291), 21 states have internal predecessors, (19291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:08,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1159.0) internal successors, (25498), 22 states have internal predecessors, (25498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:08,411 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1159.0) internal successors, (25498), 22 states have internal predecessors, (25498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:08,411 INFO L186 Difference]: Start difference. First operand has 1025 places, 952 transitions, 2115 flow. Second operand 21 states and 19291 transitions. [2022-07-19 21:22:08,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1045 places, 976 transitions, 2367 flow [2022-07-19 21:22:08,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1044 places, 976 transitions, 2353 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:08,423 INFO L242 Difference]: Finished difference. Result has 1049 places, 965 transitions, 2239 flow [2022-07-19 21:22:08,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=1024, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=941, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2239, PETRI_PLACES=1049, PETRI_TRANSITIONS=965} [2022-07-19 21:22:08,424 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 25 predicate places. [2022-07-19 21:22:08,424 INFO L495 AbstractCegarLoop]: Abstraction has has 1049 places, 965 transitions, 2239 flow [2022-07-19 21:22:08,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 917.6111111111111) internal successors, (16517), 18 states have internal predecessors, (16517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:08,425 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:08,426 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] [2022-07-19 21:22:08,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:08,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2022-07-19 21:22:08,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:08,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:08,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1630016605, now seen corresponding path program 1 times [2022-07-19 21:22:08,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:08,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738742047] [2022-07-19 21:22:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:08,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:08,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:08,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738742047] [2022-07-19 21:22:08,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738742047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:08,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615457157] [2022-07-19 21:22:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:08,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:08,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:08,747 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:08,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-07-19 21:22:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:09,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:22:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:09,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:09,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615457157] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:09,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:09,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:22:09,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248078060] [2022-07-19 21:22:09,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:09,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:22:09,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:22:09,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:22:09,933 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-19 21:22:09,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1049 places, 965 transitions, 2239 flow. Second operand has 34 states, 34 states have (on average 917.7941176470588) internal successors, (31205), 34 states have internal predecessors, (31205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:09,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:09,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-19 21:22:09,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:11,311 INFO L129 PetriNetUnfolder]: 0/1435 cut-off events. [2022-07-19 21:22:11,312 INFO L130 PetriNetUnfolder]: For 762/762 co-relation queries the response was YES. [2022-07-19 21:22:11,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2320 conditions, 1435 events. 0/1435 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4492 event pairs, 0 based on Foata normal form. 8/1443 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-19 21:22:11,315 INFO L132 encePairwiseOnDemand]: 1153/1159 looper letters, 67 selfloop transitions, 45 changer transitions 0/1016 dead transitions. [2022-07-19 21:22:11,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1093 places, 1016 transitions, 2779 flow [2022-07-19 21:22:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:22:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:22:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 41295 transitions. [2022-07-19 21:22:11,333 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7917745182628703 [2022-07-19 21:22:11,333 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 41295 transitions. [2022-07-19 21:22:11,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 41295 transitions. [2022-07-19 21:22:11,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:11,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 41295 transitions. [2022-07-19 21:22:11,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 917.6666666666666) internal successors, (41295), 45 states have internal predecessors, (41295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:11,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1159.0) internal successors, (53314), 46 states have internal predecessors, (53314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:11,398 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1159.0) internal successors, (53314), 46 states have internal predecessors, (53314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:11,399 INFO L186 Difference]: Start difference. First operand has 1049 places, 965 transitions, 2239 flow. Second operand 45 states and 41295 transitions. [2022-07-19 21:22:11,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1093 places, 1016 transitions, 2779 flow [2022-07-19 21:22:11,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1087 places, 1016 transitions, 2739 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:22:11,413 INFO L242 Difference]: Finished difference. Result has 1096 places, 990 transitions, 2517 flow [2022-07-19 21:22:11,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=1043, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2517, PETRI_PLACES=1096, PETRI_TRANSITIONS=990} [2022-07-19 21:22:11,414 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 72 predicate places. [2022-07-19 21:22:11,414 INFO L495 AbstractCegarLoop]: Abstraction has has 1096 places, 990 transitions, 2517 flow [2022-07-19 21:22:11,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 917.7941176470588) internal successors, (31205), 34 states have internal predecessors, (31205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:11,417 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:11,417 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:11,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:11,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:11,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1766954647, now seen corresponding path program 1 times [2022-07-19 21:22:11,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:11,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088144068] [2022-07-19 21:22:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:11,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:11,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088144068] [2022-07-19 21:22:11,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088144068] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330422619] [2022-07-19 21:22:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:11,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:11,954 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:11,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-07-19 21:22:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:12,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:22:12,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:13,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:13,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330422619] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:13,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:13,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:22:13,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216564702] [2022-07-19 21:22:13,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:13,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:22:13,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:22:13,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:22:13,785 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-19 21:22:13,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1096 places, 990 transitions, 2517 flow. Second operand has 66 states, 66 states have (on average 917.8939393939394) internal successors, (60581), 66 states have internal predecessors, (60581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:13,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:13,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-19 21:22:13,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:16,081 INFO L129 PetriNetUnfolder]: 0/1259 cut-off events. [2022-07-19 21:22:16,082 INFO L130 PetriNetUnfolder]: For 2466/2466 co-relation queries the response was YES. [2022-07-19 21:22:16,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2184 conditions, 1259 events. 0/1259 cut-off events. For 2466/2466 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3329 event pairs, 0 based on Foata normal form. 16/1275 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-07-19 21:22:16,084 INFO L132 encePairwiseOnDemand]: 1153/1159 looper letters, 99 selfloop transitions, 93 changer transitions 0/1096 dead transitions. [2022-07-19 21:22:16,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1188 places, 1096 transitions, 3749 flow [2022-07-19 21:22:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:22:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:22:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 85303 transitions. [2022-07-19 21:22:16,120 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7914034159963632 [2022-07-19 21:22:16,120 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 85303 transitions. [2022-07-19 21:22:16,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 85303 transitions. [2022-07-19 21:22:16,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:16,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 85303 transitions. [2022-07-19 21:22:16,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 917.236559139785) internal successors, (85303), 93 states have internal predecessors, (85303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:16,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1159.0) internal successors, (108946), 94 states have internal predecessors, (108946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:16,254 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1159.0) internal successors, (108946), 94 states have internal predecessors, (108946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:16,255 INFO L186 Difference]: Start difference. First operand has 1096 places, 990 transitions, 2517 flow. Second operand 93 states and 85303 transitions. [2022-07-19 21:22:16,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1188 places, 1096 transitions, 3749 flow [2022-07-19 21:22:16,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1170 places, 1096 transitions, 3661 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-19 21:22:16,270 INFO L242 Difference]: Finished difference. Result has 1187 places, 1039 transitions, 3151 flow [2022-07-19 21:22:16,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=1078, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3151, PETRI_PLACES=1187, PETRI_TRANSITIONS=1039} [2022-07-19 21:22:16,271 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 163 predicate places. [2022-07-19 21:22:16,271 INFO L495 AbstractCegarLoop]: Abstraction has has 1187 places, 1039 transitions, 3151 flow [2022-07-19 21:22:16,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 917.8939393939394) internal successors, (60581), 66 states have internal predecessors, (60581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:16,277 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:16,278 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:16,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-07-19 21:22:16,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:16,491 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:16,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:16,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2128612671, now seen corresponding path program 1 times [2022-07-19 21:22:16,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:16,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58009292] [2022-07-19 21:22:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:16,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:17,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:17,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58009292] [2022-07-19 21:22:17,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58009292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:17,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965333310] [2022-07-19 21:22:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:17,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:17,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:17,521 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:17,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-07-19 21:22:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 21:22:18,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:18,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:20,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965333310] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:20,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:20,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-19 21:22:20,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88729315] [2022-07-19 21:22:20,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:20,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-19 21:22:20,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:20,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-19 21:22:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-19 21:22:20,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-19 21:22:20,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1187 places, 1039 transitions, 3151 flow. Second operand has 130 states, 130 states have (on average 917.9461538461538) internal successors, (119333), 130 states have internal predecessors, (119333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:20,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:20,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-19 21:22:20,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:22,840 INFO L129 PetriNetUnfolder]: 0/1226 cut-off events. [2022-07-19 21:22:22,840 INFO L130 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2022-07-19 21:22:22,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2215 conditions, 1226 events. 0/1226 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3129 event pairs, 0 based on Foata normal form. 3/1229 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-07-19 21:22:22,842 INFO L132 encePairwiseOnDemand]: 1154/1159 looper letters, 102 selfloop transitions, 100 changer transitions 0/1096 dead transitions. [2022-07-19 21:22:22,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1277 places, 1096 transitions, 3997 flow [2022-07-19 21:22:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-07-19 21:22:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2022-07-19 21:22:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 93535 transitions. [2022-07-19 21:22:22,881 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912077686985062 [2022-07-19 21:22:22,882 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 93535 transitions. [2022-07-19 21:22:22,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 93535 transitions. [2022-07-19 21:22:22,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:22,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 93535 transitions. [2022-07-19 21:22:22,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 917.0098039215686) internal successors, (93535), 102 states have internal predecessors, (93535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:23,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 1159.0) internal successors, (119377), 103 states have internal predecessors, (119377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:23,030 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 1159.0) internal successors, (119377), 103 states have internal predecessors, (119377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:23,030 INFO L186 Difference]: Start difference. First operand has 1187 places, 1039 transitions, 3151 flow. Second operand 102 states and 93535 transitions. [2022-07-19 21:22:23,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1277 places, 1096 transitions, 3997 flow [2022-07-19 21:22:23,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1204 places, 1096 transitions, 3655 flow, removed 20 selfloop flow, removed 73 redundant places. [2022-07-19 21:22:23,048 INFO L242 Difference]: Finished difference. Result has 1204 places, 1034 transitions, 3063 flow [2022-07-19 21:22:23,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=1103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=3063, PETRI_PLACES=1204, PETRI_TRANSITIONS=1034} [2022-07-19 21:22:23,049 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 180 predicate places. [2022-07-19 21:22:23,049 INFO L495 AbstractCegarLoop]: Abstraction has has 1204 places, 1034 transitions, 3063 flow [2022-07-19 21:22:23,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 917.9461538461538) internal successors, (119333), 130 states have internal predecessors, (119333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:23,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:23,061 INFO L200 CegarLoopForPetriNet]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:23,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:23,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:23,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:23,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1805696958, now seen corresponding path program 1 times [2022-07-19 21:22:23,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:23,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110745495] [2022-07-19 21:22:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:23,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:23,316 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:22:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:23,391 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:22:23,391 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:22:23,391 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:22:23,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:22:23,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2022-07-19 21:22:23,392 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:23,392 WARN L231 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:22:23,392 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2022-07-19 21:22:23,437 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:22:23,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1053 places, 1192 transitions, 3676 flow [2022-07-19 21:22:24,512 INFO L129 PetriNetUnfolder]: 344/2411 cut-off events. [2022-07-19 21:22:24,513 INFO L130 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2022-07-19 21:22:24,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3109 conditions, 2411 events. 344/2411 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8860 event pairs, 0 based on Foata normal form. 0/1997 useless extension candidates. Maximal degree in co-relation 2975. Up to 70 conditions per place. [2022-07-19 21:22:24,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 1053 places, 1192 transitions, 3676 flow [2022-07-19 21:22:24,802 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1053 places, 1192 transitions, 3676 flow [2022-07-19 21:22:24,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:22:24,803 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:22:24,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:22:24,806 INFO L129 PetriNetUnfolder]: 2/73 cut-off events. [2022-07-19 21:22:24,806 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:22:24,806 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:24,806 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] [2022-07-19 21:22:24,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:24,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:24,807 INFO L85 PathProgramCache]: Analyzing trace with hash 510725410, now seen corresponding path program 1 times [2022-07-19 21:22:24,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:24,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960266304] [2022-07-19 21:22:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:24,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:24,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:24,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960266304] [2022-07-19 21:22:24,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960266304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:24,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:24,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:22:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403800086] [2022-07-19 21:22:24,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:24,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:22:24,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:22:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:22:24,829 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 942 out of 1192 [2022-07-19 21:22:24,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1053 places, 1192 transitions, 3676 flow. Second operand has 3 states, 3 states have (on average 943.0) internal successors, (2829), 3 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:24,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:24,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 942 of 1192 [2022-07-19 21:22:24,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:25,999 INFO L129 PetriNetUnfolder]: 0/2010 cut-off events. [2022-07-19 21:22:26,001 INFO L130 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2022-07-19 21:22:26,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2917 conditions, 2010 events. 0/2010 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8332 event pairs, 0 based on Foata normal form. 20187/22129 useless extension candidates. Maximal degree in co-relation 0. Up to 204 conditions per place. [2022-07-19 21:22:26,031 INFO L132 encePairwiseOnDemand]: 981/1192 looper letters, 43 selfloop transitions, 2 changer transitions 11/987 dead transitions. [2022-07-19 21:22:26,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1054 places, 987 transitions, 3356 flow [2022-07-19 21:22:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:22:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:22:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3087 transitions. [2022-07-19 21:22:26,033 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.863255033557047 [2022-07-19 21:22:26,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3087 transitions. [2022-07-19 21:22:26,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3087 transitions. [2022-07-19 21:22:26,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:26,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3087 transitions. [2022-07-19 21:22:26,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1029.0) internal successors, (3087), 3 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:26,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1192.0) internal successors, (4768), 4 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:26,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1192.0) internal successors, (4768), 4 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:26,038 INFO L186 Difference]: Start difference. First operand has 1053 places, 1192 transitions, 3676 flow. Second operand 3 states and 3087 transitions. [2022-07-19 21:22:26,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1054 places, 987 transitions, 3356 flow [2022-07-19 21:22:26,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1054 places, 987 transitions, 2234 flow, removed 561 selfloop flow, removed 0 redundant places. [2022-07-19 21:22:26,057 INFO L242 Difference]: Finished difference. Result has 1055 places, 973 transitions, 2126 flow [2022-07-19 21:22:26,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=1052, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2126, PETRI_PLACES=1055, PETRI_TRANSITIONS=973} [2022-07-19 21:22:26,058 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 2 predicate places. [2022-07-19 21:22:26,058 INFO L495 AbstractCegarLoop]: Abstraction has has 1055 places, 973 transitions, 2126 flow [2022-07-19 21:22:26,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 943.0) internal successors, (2829), 3 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:26,059 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:26,059 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] [2022-07-19 21:22:26,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2022-07-19 21:22:26,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1460662602, now seen corresponding path program 1 times [2022-07-19 21:22:26,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:26,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461537563] [2022-07-19 21:22:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:26,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:26,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:26,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461537563] [2022-07-19 21:22:26,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461537563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:26,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592738295] [2022-07-19 21:22:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:26,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:26,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:26,094 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:26,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-07-19 21:22:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:27,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:22:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:27,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:27,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592738295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:27,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:27,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:22:27,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694734638] [2022-07-19 21:22:27,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:27,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:22:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:27,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:22:27,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:22:27,142 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-07-19 21:22:27,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1055 places, 973 transitions, 2126 flow. Second operand has 10 states, 10 states have (on average 943.3) internal successors, (9433), 10 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:27,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:27,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-07-19 21:22:27,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:28,230 INFO L129 PetriNetUnfolder]: 0/1614 cut-off events. [2022-07-19 21:22:28,230 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-19 21:22:28,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 1614 events. 0/1614 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5544 event pairs, 0 based on Foata normal form. 2/1616 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2022-07-19 21:22:28,234 INFO L132 encePairwiseOnDemand]: 1186/1192 looper letters, 44 selfloop transitions, 9 changer transitions 0/983 dead transitions. [2022-07-19 21:22:28,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1052 places, 983 transitions, 2254 flow [2022-07-19 21:22:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:22:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:22:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8524 transitions. [2022-07-19 21:22:28,238 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945563012677107 [2022-07-19 21:22:28,238 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8524 transitions. [2022-07-19 21:22:28,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8524 transitions. [2022-07-19 21:22:28,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:28,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8524 transitions. [2022-07-19 21:22:28,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 947.1111111111111) internal successors, (8524), 9 states have internal predecessors, (8524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:28,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1192.0) internal successors, (11920), 10 states have internal predecessors, (11920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:28,249 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1192.0) internal successors, (11920), 10 states have internal predecessors, (11920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:28,249 INFO L186 Difference]: Start difference. First operand has 1055 places, 973 transitions, 2126 flow. Second operand 9 states and 8524 transitions. [2022-07-19 21:22:28,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1052 places, 983 transitions, 2254 flow [2022-07-19 21:22:28,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1051 places, 983 transitions, 2252 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:28,260 INFO L242 Difference]: Finished difference. Result has 1054 places, 979 transitions, 2174 flow [2022-07-19 21:22:28,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=1043, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=967, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2174, PETRI_PLACES=1054, PETRI_TRANSITIONS=979} [2022-07-19 21:22:28,261 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 1 predicate places. [2022-07-19 21:22:28,261 INFO L495 AbstractCegarLoop]: Abstraction has has 1054 places, 979 transitions, 2174 flow [2022-07-19 21:22:28,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 943.3) internal successors, (9433), 10 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:28,262 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:28,262 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] [2022-07-19 21:22:28,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:28,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2022-07-19 21:22:28,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1788896161, now seen corresponding path program 1 times [2022-07-19 21:22:28,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:28,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517509695] [2022-07-19 21:22:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:28,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:28,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517509695] [2022-07-19 21:22:28,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517509695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019044075] [2022-07-19 21:22:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:28,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:28,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:28,529 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:28,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-07-19 21:22:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:29,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:22:29,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:29,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:29,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019044075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:29,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:29,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:22:29,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451990194] [2022-07-19 21:22:29,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:29,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:22:29,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:29,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:22:29,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:22:29,632 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-07-19 21:22:29,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1054 places, 979 transitions, 2174 flow. Second operand has 18 states, 18 states have (on average 943.6111111111111) internal successors, (16985), 18 states have internal predecessors, (16985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:29,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:29,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-07-19 21:22:29,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:30,797 INFO L129 PetriNetUnfolder]: 0/1570 cut-off events. [2022-07-19 21:22:30,797 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-07-19 21:22:30,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2271 conditions, 1570 events. 0/1570 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5224 event pairs, 0 based on Foata normal form. 4/1574 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-07-19 21:22:30,800 INFO L132 encePairwiseOnDemand]: 1186/1192 looper letters, 52 selfloop transitions, 21 changer transitions 0/1003 dead transitions. [2022-07-19 21:22:30,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1074 places, 1003 transitions, 2428 flow [2022-07-19 21:22:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:22:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:22:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19838 transitions. [2022-07-19 21:22:30,809 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925055928411633 [2022-07-19 21:22:30,809 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19838 transitions. [2022-07-19 21:22:30,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19838 transitions. [2022-07-19 21:22:30,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:30,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19838 transitions. [2022-07-19 21:22:30,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 944.6666666666666) internal successors, (19838), 21 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:30,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1192.0) internal successors, (26224), 22 states have internal predecessors, (26224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:30,838 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1192.0) internal successors, (26224), 22 states have internal predecessors, (26224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:30,839 INFO L186 Difference]: Start difference. First operand has 1054 places, 979 transitions, 2174 flow. Second operand 21 states and 19838 transitions. [2022-07-19 21:22:30,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1074 places, 1003 transitions, 2428 flow [2022-07-19 21:22:30,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1073 places, 1003 transitions, 2414 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:30,850 INFO L242 Difference]: Finished difference. Result has 1078 places, 992 transitions, 2298 flow [2022-07-19 21:22:30,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=1053, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=979, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=968, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2298, PETRI_PLACES=1078, PETRI_TRANSITIONS=992} [2022-07-19 21:22:30,851 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 25 predicate places. [2022-07-19 21:22:30,851 INFO L495 AbstractCegarLoop]: Abstraction has has 1078 places, 992 transitions, 2298 flow [2022-07-19 21:22:30,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 943.6111111111111) internal successors, (16985), 18 states have internal predecessors, (16985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:30,852 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:30,852 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] [2022-07-19 21:22:30,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:31,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:31,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1716228483, now seen corresponding path program 1 times [2022-07-19 21:22:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:31,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996549009] [2022-07-19 21:22:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:31,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:31,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:31,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996549009] [2022-07-19 21:22:31,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996549009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110277822] [2022-07-19 21:22:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:31,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:31,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:31,183 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:31,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-07-19 21:22:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:32,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:22:32,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:32,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:32,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110277822] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:32,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:32,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:22:32,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732134883] [2022-07-19 21:22:32,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:32,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:22:32,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:22:32,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:22:32,415 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-07-19 21:22:32,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1078 places, 992 transitions, 2298 flow. Second operand has 34 states, 34 states have (on average 943.7941176470588) internal successors, (32089), 34 states have internal predecessors, (32089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:32,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:32,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-07-19 21:22:32,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:33,885 INFO L129 PetriNetUnfolder]: 0/1482 cut-off events. [2022-07-19 21:22:33,885 INFO L130 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-07-19 21:22:33,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2397 conditions, 1482 events. 0/1482 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4648 event pairs, 0 based on Foata normal form. 8/1490 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-19 21:22:33,887 INFO L132 encePairwiseOnDemand]: 1186/1192 looper letters, 68 selfloop transitions, 45 changer transitions 0/1043 dead transitions. [2022-07-19 21:22:33,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1122 places, 1043 transitions, 2840 flow [2022-07-19 21:22:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:22:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:22:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 42466 transitions. [2022-07-19 21:22:33,905 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916853094705444 [2022-07-19 21:22:33,905 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 42466 transitions. [2022-07-19 21:22:33,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 42466 transitions. [2022-07-19 21:22:33,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:33,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 42466 transitions. [2022-07-19 21:22:33,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 943.6888888888889) internal successors, (42466), 45 states have internal predecessors, (42466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:33,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1192.0) internal successors, (54832), 46 states have internal predecessors, (54832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:33,968 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1192.0) internal successors, (54832), 46 states have internal predecessors, (54832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:33,968 INFO L186 Difference]: Start difference. First operand has 1078 places, 992 transitions, 2298 flow. Second operand 45 states and 42466 transitions. [2022-07-19 21:22:33,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1122 places, 1043 transitions, 2840 flow [2022-07-19 21:22:33,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1116 places, 1043 transitions, 2800 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:22:33,980 INFO L242 Difference]: Finished difference. Result has 1125 places, 1017 transitions, 2576 flow [2022-07-19 21:22:33,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=1072, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=969, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2576, PETRI_PLACES=1125, PETRI_TRANSITIONS=1017} [2022-07-19 21:22:33,982 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 72 predicate places. [2022-07-19 21:22:33,982 INFO L495 AbstractCegarLoop]: Abstraction has has 1125 places, 1017 transitions, 2576 flow [2022-07-19 21:22:33,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 943.7941176470588) internal successors, (32089), 34 states have internal predecessors, (32089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:33,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:33,985 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:34,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-07-19 21:22:34,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-07-19 21:22:34,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1335466633, now seen corresponding path program 1 times [2022-07-19 21:22:34,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:34,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616408041] [2022-07-19 21:22:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:34,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:34,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:34,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616408041] [2022-07-19 21:22:34,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616408041] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:34,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143992686] [2022-07-19 21:22:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:34,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:34,505 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:34,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-07-19 21:22:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:35,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:22:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:35,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:36,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143992686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:36,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:36,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:22:36,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889407486] [2022-07-19 21:22:36,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:36,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:22:36,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:36,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:22:36,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:22:36,393 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-07-19 21:22:36,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1125 places, 1017 transitions, 2576 flow. Second operand has 66 states, 66 states have (on average 943.8939393939394) internal successors, (62297), 66 states have internal predecessors, (62297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:36,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:36,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-07-19 21:22:36,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:38,657 INFO L129 PetriNetUnfolder]: 0/1306 cut-off events. [2022-07-19 21:22:38,658 INFO L130 PetriNetUnfolder]: For 2587/2587 co-relation queries the response was YES. [2022-07-19 21:22:38,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2274 conditions, 1306 events. 0/1306 cut-off events. For 2587/2587 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3500 event pairs, 0 based on Foata normal form. 16/1322 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-07-19 21:22:38,660 INFO L132 encePairwiseOnDemand]: 1186/1192 looper letters, 100 selfloop transitions, 93 changer transitions 0/1123 dead transitions. [2022-07-19 21:22:38,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1217 places, 1123 transitions, 3810 flow [2022-07-19 21:22:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:22:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:22:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 87722 transitions. [2022-07-19 21:22:38,699 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7913148589160713 [2022-07-19 21:22:38,699 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 87722 transitions. [2022-07-19 21:22:38,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 87722 transitions. [2022-07-19 21:22:38,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:38,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 87722 transitions. [2022-07-19 21:22:38,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 943.247311827957) internal successors, (87722), 93 states have internal predecessors, (87722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:38,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1192.0) internal successors, (112048), 94 states have internal predecessors, (112048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:38,838 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1192.0) internal successors, (112048), 94 states have internal predecessors, (112048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:38,838 INFO L186 Difference]: Start difference. First operand has 1125 places, 1017 transitions, 2576 flow. Second operand 93 states and 87722 transitions. [2022-07-19 21:22:38,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1217 places, 1123 transitions, 3810 flow [2022-07-19 21:22:38,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1199 places, 1123 transitions, 3722 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-19 21:22:38,859 INFO L242 Difference]: Finished difference. Result has 1216 places, 1066 transitions, 3210 flow [2022-07-19 21:22:38,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=1107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3210, PETRI_PLACES=1216, PETRI_TRANSITIONS=1066} [2022-07-19 21:22:38,860 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 163 predicate places. [2022-07-19 21:22:38,860 INFO L495 AbstractCegarLoop]: Abstraction has has 1216 places, 1066 transitions, 3210 flow [2022-07-19 21:22:38,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 943.8939393939394) internal successors, (62297), 66 states have internal predecessors, (62297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:38,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:38,867 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:38,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-07-19 21:22:39,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-07-19 21:22:39,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:39,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash -678875617, now seen corresponding path program 1 times [2022-07-19 21:22:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:39,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876241361] [2022-07-19 21:22:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:39,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:39,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876241361] [2022-07-19 21:22:39,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876241361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:39,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055188631] [2022-07-19 21:22:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:39,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:39,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:39,915 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:39,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-07-19 21:22:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:41,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 21:22:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:41,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:43,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055188631] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:43,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:43,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-19 21:22:43,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059242392] [2022-07-19 21:22:43,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:43,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-19 21:22:43,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-19 21:22:43,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-19 21:22:43,413 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-07-19 21:22:43,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1216 places, 1066 transitions, 3210 flow. Second operand has 130 states, 130 states have (on average 943.9461538461538) internal successors, (122713), 130 states have internal predecessors, (122713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:43,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:43,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-07-19 21:22:43,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:45,593 INFO L129 PetriNetUnfolder]: 0/1262 cut-off events. [2022-07-19 21:22:45,593 INFO L130 PetriNetUnfolder]: For 2686/2686 co-relation queries the response was YES. [2022-07-19 21:22:45,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2283 conditions, 1262 events. 0/1262 cut-off events. For 2686/2686 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3227 event pairs, 0 based on Foata normal form. 4/1266 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-07-19 21:22:45,595 INFO L132 encePairwiseOnDemand]: 1187/1192 looper letters, 105 selfloop transitions, 103 changer transitions 0/1128 dead transitions. [2022-07-19 21:22:45,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1309 places, 1128 transitions, 4122 flow [2022-07-19 21:22:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-19 21:22:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-07-19 21:22:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 99017 transitions. [2022-07-19 21:22:45,776 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7911233620965165 [2022-07-19 21:22:45,776 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 99017 transitions. [2022-07-19 21:22:45,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 99017 transitions. [2022-07-19 21:22:45,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:45,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 99017 transitions. [2022-07-19 21:22:45,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 943.0190476190476) internal successors, (99017), 105 states have internal predecessors, (99017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:45,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 1192.0) internal successors, (126352), 106 states have internal predecessors, (126352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:45,926 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 1192.0) internal successors, (126352), 106 states have internal predecessors, (126352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:45,926 INFO L186 Difference]: Start difference. First operand has 1216 places, 1066 transitions, 3210 flow. Second operand 105 states and 99017 transitions. [2022-07-19 21:22:45,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1309 places, 1128 transitions, 4122 flow [2022-07-19 21:22:45,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1236 places, 1128 transitions, 3770 flow, removed 21 selfloop flow, removed 73 redundant places. [2022-07-19 21:22:45,947 INFO L242 Difference]: Finished difference. Result has 1236 places, 1064 transitions, 3156 flow [2022-07-19 21:22:45,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=1132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=3156, PETRI_PLACES=1236, PETRI_TRANSITIONS=1064} [2022-07-19 21:22:45,948 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 183 predicate places. [2022-07-19 21:22:45,948 INFO L495 AbstractCegarLoop]: Abstraction has has 1236 places, 1064 transitions, 3156 flow [2022-07-19 21:22:45,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 943.9461538461538) internal successors, (122713), 130 states have internal predecessors, (122713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:45,960 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:45,961 INFO L200 CegarLoopForPetriNet]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:45,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-07-19 21:22:46,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:46,170 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:46,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:46,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1145413005, now seen corresponding path program 1 times [2022-07-19 21:22:46,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:46,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657182164] [2022-07-19 21:22:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:46,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:46,216 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:22:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:22:46,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:22:46,387 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:22:46,387 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:22:46,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:22:46,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-07-19 21:22:46,388 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:46,388 WARN L231 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:22:46,388 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2022-07-19 21:22:46,430 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:22:46,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1082 places, 1225 transitions, 3815 flow [2022-07-19 21:22:47,603 INFO L129 PetriNetUnfolder]: 354/2480 cut-off events. [2022-07-19 21:22:47,604 INFO L130 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2022-07-19 21:22:47,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3216 conditions, 2480 events. 354/2480 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9141 event pairs, 0 based on Foata normal form. 0/2054 useless extension candidates. Maximal degree in co-relation 3081. Up to 72 conditions per place. [2022-07-19 21:22:47,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 1082 places, 1225 transitions, 3815 flow [2022-07-19 21:22:47,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1082 places, 1225 transitions, 3815 flow [2022-07-19 21:22:47,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:22:47,921 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@424fb454, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55335599 [2022-07-19 21:22:47,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:22:47,925 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2022-07-19 21:22:47,925 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:22:47,925 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:47,925 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] [2022-07-19 21:22:47,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:47,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:47,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1214954978, now seen corresponding path program 1 times [2022-07-19 21:22:47,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:47,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343715756] [2022-07-19 21:22:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:47,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:47,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343715756] [2022-07-19 21:22:47,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343715756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:47,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:47,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:22:47,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722145603] [2022-07-19 21:22:47,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:47,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:22:47,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:47,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:22:47,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:22:47,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 968 out of 1225 [2022-07-19 21:22:47,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1082 places, 1225 transitions, 3815 flow. Second operand has 3 states, 3 states have (on average 969.0) internal successors, (2907), 3 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:47,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:47,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 968 of 1225 [2022-07-19 21:22:47,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:49,291 INFO L129 PetriNetUnfolder]: 0/2068 cut-off events. [2022-07-19 21:22:49,292 INFO L130 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2022-07-19 21:22:49,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3019 conditions, 2068 events. 0/2068 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8543 event pairs, 0 based on Foata normal form. 21410/23408 useless extension candidates. Maximal degree in co-relation 0. Up to 210 conditions per place. [2022-07-19 21:22:49,295 INFO L132 encePairwiseOnDemand]: 1008/1225 looper letters, 44 selfloop transitions, 2 changer transitions 11/1014 dead transitions. [2022-07-19 21:22:49,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1083 places, 1014 transitions, 3485 flow [2022-07-19 21:22:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:22:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:22:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3172 transitions. [2022-07-19 21:22:49,298 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8631292517006802 [2022-07-19 21:22:49,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3172 transitions. [2022-07-19 21:22:49,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3172 transitions. [2022-07-19 21:22:49,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:49,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3172 transitions. [2022-07-19 21:22:49,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1057.3333333333333) internal successors, (3172), 3 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:49,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1225.0) internal successors, (4900), 4 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:49,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1225.0) internal successors, (4900), 4 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:49,302 INFO L186 Difference]: Start difference. First operand has 1082 places, 1225 transitions, 3815 flow. Second operand 3 states and 3172 transitions. [2022-07-19 21:22:49,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1083 places, 1014 transitions, 3485 flow [2022-07-19 21:22:49,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1083 places, 1014 transitions, 2295 flow, removed 595 selfloop flow, removed 0 redundant places. [2022-07-19 21:22:49,320 INFO L242 Difference]: Finished difference. Result has 1084 places, 1000 transitions, 2185 flow [2022-07-19 21:22:49,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=1081, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1008, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2185, PETRI_PLACES=1084, PETRI_TRANSITIONS=1000} [2022-07-19 21:22:49,327 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 2 predicate places. [2022-07-19 21:22:49,327 INFO L495 AbstractCegarLoop]: Abstraction has has 1084 places, 1000 transitions, 2185 flow [2022-07-19 21:22:49,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 969.0) internal successors, (2907), 3 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:49,328 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:49,328 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] [2022-07-19 21:22:49,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-07-19 21:22:49,328 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2139833034, now seen corresponding path program 1 times [2022-07-19 21:22:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:49,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566104174] [2022-07-19 21:22:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:49,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:49,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566104174] [2022-07-19 21:22:49,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566104174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748859245] [2022-07-19 21:22:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:49,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:49,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:49,359 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:49,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-07-19 21:22:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:50,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:22:50,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:50,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:50,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748859245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:50,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:50,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:22:50,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298522381] [2022-07-19 21:22:50,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:50,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:22:50,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:50,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:22:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:22:50,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-07-19 21:22:50,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1084 places, 1000 transitions, 2185 flow. Second operand has 10 states, 10 states have (on average 969.3) internal successors, (9693), 10 states have internal predecessors, (9693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:50,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:50,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-07-19 21:22:50,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:51,507 INFO L129 PetriNetUnfolder]: 0/1661 cut-off events. [2022-07-19 21:22:51,508 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-07-19 21:22:51,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 1661 events. 0/1661 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5682 event pairs, 0 based on Foata normal form. 2/1663 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2022-07-19 21:22:51,510 INFO L132 encePairwiseOnDemand]: 1219/1225 looper letters, 45 selfloop transitions, 9 changer transitions 0/1010 dead transitions. [2022-07-19 21:22:51,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1081 places, 1010 transitions, 2315 flow [2022-07-19 21:22:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:22:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:22:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8759 transitions. [2022-07-19 21:22:51,515 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7944671201814059 [2022-07-19 21:22:51,515 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8759 transitions. [2022-07-19 21:22:51,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8759 transitions. [2022-07-19 21:22:51,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:51,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8759 transitions. [2022-07-19 21:22:51,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 973.2222222222222) internal successors, (8759), 9 states have internal predecessors, (8759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:51,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1225.0) internal successors, (12250), 10 states have internal predecessors, (12250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:51,525 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1225.0) internal successors, (12250), 10 states have internal predecessors, (12250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:51,525 INFO L186 Difference]: Start difference. First operand has 1084 places, 1000 transitions, 2185 flow. Second operand 9 states and 8759 transitions. [2022-07-19 21:22:51,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1081 places, 1010 transitions, 2315 flow [2022-07-19 21:22:51,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1080 places, 1010 transitions, 2313 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:51,535 INFO L242 Difference]: Finished difference. Result has 1083 places, 1006 transitions, 2233 flow [2022-07-19 21:22:51,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=1072, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=994, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2233, PETRI_PLACES=1083, PETRI_TRANSITIONS=1006} [2022-07-19 21:22:51,535 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 1 predicate places. [2022-07-19 21:22:51,535 INFO L495 AbstractCegarLoop]: Abstraction has has 1083 places, 1006 transitions, 2233 flow [2022-07-19 21:22:51,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 969.3) internal successors, (9693), 10 states have internal predecessors, (9693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:51,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:51,537 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] [2022-07-19 21:22:51,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:51,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:51,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:51,741 INFO L85 PathProgramCache]: Analyzing trace with hash -582976095, now seen corresponding path program 1 times [2022-07-19 21:22:51,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:51,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748298130] [2022-07-19 21:22:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:51,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:51,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:51,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748298130] [2022-07-19 21:22:51,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748298130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:51,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182414741] [2022-07-19 21:22:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:51,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:51,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:51,795 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:51,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-07-19 21:22:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:52,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:22:52,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:52,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182414741] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:53,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:53,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:22:53,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376184935] [2022-07-19 21:22:53,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:53,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:22:53,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:22:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:22:53,017 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-07-19 21:22:53,022 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1083 places, 1006 transitions, 2233 flow. Second operand has 18 states, 18 states have (on average 969.6111111111111) internal successors, (17453), 18 states have internal predecessors, (17453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:53,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:53,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-07-19 21:22:53,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:54,356 INFO L129 PetriNetUnfolder]: 0/1617 cut-off events. [2022-07-19 21:22:54,357 INFO L130 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-07-19 21:22:54,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2339 conditions, 1617 events. 0/1617 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5423 event pairs, 0 based on Foata normal form. 4/1621 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-07-19 21:22:54,360 INFO L132 encePairwiseOnDemand]: 1219/1225 looper letters, 53 selfloop transitions, 21 changer transitions 0/1030 dead transitions. [2022-07-19 21:22:54,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1103 places, 1030 transitions, 2489 flow [2022-07-19 21:22:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:22:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:22:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20385 transitions. [2022-07-19 21:22:54,370 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924198250728863 [2022-07-19 21:22:54,370 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20385 transitions. [2022-07-19 21:22:54,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20385 transitions. [2022-07-19 21:22:54,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:54,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20385 transitions. [2022-07-19 21:22:54,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 970.7142857142857) internal successors, (20385), 21 states have internal predecessors, (20385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:54,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1225.0) internal successors, (26950), 22 states have internal predecessors, (26950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:54,402 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1225.0) internal successors, (26950), 22 states have internal predecessors, (26950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:54,403 INFO L186 Difference]: Start difference. First operand has 1083 places, 1006 transitions, 2233 flow. Second operand 21 states and 20385 transitions. [2022-07-19 21:22:54,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1103 places, 1030 transitions, 2489 flow [2022-07-19 21:22:54,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1102 places, 1030 transitions, 2475 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:22:54,415 INFO L242 Difference]: Finished difference. Result has 1107 places, 1019 transitions, 2357 flow [2022-07-19 21:22:54,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=1082, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=995, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2357, PETRI_PLACES=1107, PETRI_TRANSITIONS=1019} [2022-07-19 21:22:54,416 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 25 predicate places. [2022-07-19 21:22:54,416 INFO L495 AbstractCegarLoop]: Abstraction has has 1107 places, 1019 transitions, 2357 flow [2022-07-19 21:22:54,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 969.6111111111111) internal successors, (17453), 18 states have internal predecessors, (17453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:54,418 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:54,418 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] [2022-07-19 21:22:54,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-07-19 21:22:54,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:54,639 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:54,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2043167363, now seen corresponding path program 1 times [2022-07-19 21:22:54,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:54,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716467575] [2022-07-19 21:22:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:54,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:54,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:54,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716467575] [2022-07-19 21:22:54,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716467575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:54,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751021806] [2022-07-19 21:22:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:54,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:54,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:54,740 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:54,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-07-19 21:22:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:22:55,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:55,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:56,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751021806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:56,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:56,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 21:22:56,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499316508] [2022-07-19 21:22:56,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:56,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:22:56,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:56,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:22:56,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 21:22:56,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-07-19 21:22:56,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1107 places, 1019 transitions, 2357 flow. Second operand has 34 states, 34 states have (on average 969.7941176470588) internal successors, (32973), 34 states have internal predecessors, (32973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:56,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:56,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-07-19 21:22:56,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:57,479 INFO L129 PetriNetUnfolder]: 0/1529 cut-off events. [2022-07-19 21:22:57,480 INFO L130 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2022-07-19 21:22:57,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2474 conditions, 1529 events. 0/1529 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4837 event pairs, 0 based on Foata normal form. 8/1537 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-19 21:22:57,483 INFO L132 encePairwiseOnDemand]: 1219/1225 looper letters, 69 selfloop transitions, 45 changer transitions 0/1070 dead transitions. [2022-07-19 21:22:57,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1151 places, 1070 transitions, 2901 flow [2022-07-19 21:22:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:22:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:22:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 43637 transitions. [2022-07-19 21:22:57,501 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916009070294785 [2022-07-19 21:22:57,502 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 43637 transitions. [2022-07-19 21:22:57,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 43637 transitions. [2022-07-19 21:22:57,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:57,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 43637 transitions. [2022-07-19 21:22:57,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 969.7111111111111) internal successors, (43637), 45 states have internal predecessors, (43637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:57,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1225.0) internal successors, (56350), 46 states have internal predecessors, (56350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:57,565 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1225.0) internal successors, (56350), 46 states have internal predecessors, (56350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:57,565 INFO L186 Difference]: Start difference. First operand has 1107 places, 1019 transitions, 2357 flow. Second operand 45 states and 43637 transitions. [2022-07-19 21:22:57,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1151 places, 1070 transitions, 2901 flow [2022-07-19 21:22:57,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1145 places, 1070 transitions, 2861 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 21:22:57,579 INFO L242 Difference]: Finished difference. Result has 1154 places, 1044 transitions, 2635 flow [2022-07-19 21:22:57,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=1101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=996, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2635, PETRI_PLACES=1154, PETRI_TRANSITIONS=1044} [2022-07-19 21:22:57,579 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 72 predicate places. [2022-07-19 21:22:57,579 INFO L495 AbstractCegarLoop]: Abstraction has has 1154 places, 1044 transitions, 2635 flow [2022-07-19 21:22:57,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 969.7941176470588) internal successors, (32973), 34 states have internal predecessors, (32973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:57,582 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:57,583 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:57,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:57,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:57,804 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:22:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:57,804 INFO L85 PathProgramCache]: Analyzing trace with hash -323795849, now seen corresponding path program 1 times [2022-07-19 21:22:57,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:57,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716721692] [2022-07-19 21:22:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:57,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:58,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:58,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716721692] [2022-07-19 21:22:58,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716721692] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:58,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202542494] [2022-07-19 21:22:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:58,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:58,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:58,083 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:58,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-07-19 21:22:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:59,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 21:22:59,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:59,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:59,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202542494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:59,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:59,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 21:22:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245249232] [2022-07-19 21:22:59,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 21:22:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 21:22:59,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 21:22:59,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-07-19 21:22:59,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1154 places, 1044 transitions, 2635 flow. Second operand has 66 states, 66 states have (on average 969.8939393939394) internal successors, (64013), 66 states have internal predecessors, (64013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:59,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:59,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-07-19 21:22:59,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:02,236 INFO L129 PetriNetUnfolder]: 0/1353 cut-off events. [2022-07-19 21:23:02,236 INFO L130 PetriNetUnfolder]: For 2708/2708 co-relation queries the response was YES. [2022-07-19 21:23:02,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2364 conditions, 1353 events. 0/1353 cut-off events. For 2708/2708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3666 event pairs, 0 based on Foata normal form. 16/1369 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-07-19 21:23:02,238 INFO L132 encePairwiseOnDemand]: 1219/1225 looper letters, 101 selfloop transitions, 93 changer transitions 0/1150 dead transitions. [2022-07-19 21:23:02,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1246 places, 1150 transitions, 3871 flow [2022-07-19 21:23:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:23:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:23:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 90141 transitions. [2022-07-19 21:23:02,275 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.791231073074391 [2022-07-19 21:23:02,275 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 90141 transitions. [2022-07-19 21:23:02,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 90141 transitions. [2022-07-19 21:23:02,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:02,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 90141 transitions. [2022-07-19 21:23:02,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 969.258064516129) internal successors, (90141), 93 states have internal predecessors, (90141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:02,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1225.0) internal successors, (115150), 94 states have internal predecessors, (115150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:02,411 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1225.0) internal successors, (115150), 94 states have internal predecessors, (115150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:02,411 INFO L186 Difference]: Start difference. First operand has 1154 places, 1044 transitions, 2635 flow. Second operand 93 states and 90141 transitions. [2022-07-19 21:23:02,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1246 places, 1150 transitions, 3871 flow [2022-07-19 21:23:02,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1228 places, 1150 transitions, 3783 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-19 21:23:02,428 INFO L242 Difference]: Finished difference. Result has 1245 places, 1093 transitions, 3269 flow [2022-07-19 21:23:02,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=1136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1044, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3269, PETRI_PLACES=1245, PETRI_TRANSITIONS=1093} [2022-07-19 21:23:02,428 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 163 predicate places. [2022-07-19 21:23:02,429 INFO L495 AbstractCegarLoop]: Abstraction has has 1245 places, 1093 transitions, 3269 flow [2022-07-19 21:23:02,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 969.8939393939394) internal successors, (64013), 66 states have internal predecessors, (64013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:02,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:02,435 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:23:02,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-07-19 21:23:02,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:23:02,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:23:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1708288287, now seen corresponding path program 1 times [2022-07-19 21:23:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:02,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045267449] [2022-07-19 21:23:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:03,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:03,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045267449] [2022-07-19 21:23:03,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045267449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:23:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772900531] [2022-07-19 21:23:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:03,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:23:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:23:03,713 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:23:03,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-07-19 21:23:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:04,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 21:23:04,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:23:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:05,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:23:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:07,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772900531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:23:07,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:23:07,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-19 21:23:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656433139] [2022-07-19 21:23:07,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:23:07,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-19 21:23:07,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:07,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-19 21:23:07,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-19 21:23:07,240 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-07-19 21:23:07,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1245 places, 1093 transitions, 3269 flow. Second operand has 130 states, 130 states have (on average 969.9461538461538) internal successors, (126093), 130 states have internal predecessors, (126093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:07,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:07,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-07-19 21:23:07,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand