./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 f4b24e32 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-?-f4b24e3 [2022-07-13 21:56:33,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:56:33,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:56:33,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:56:33,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:56:33,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:56:33,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:56:33,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:56:33,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:56:33,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:56:33,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:56:33,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:56:33,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:56:33,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:56:33,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:56:33,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:56:33,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:56:33,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:56:33,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:56:33,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:56:33,718 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:56:33,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:56:33,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:56:33,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:56:33,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:56:33,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:56:33,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:56:33,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:56:33,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:56:33,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:56:33,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:56:33,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:56:33,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:56:33,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:56:33,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:56:33,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:56:33,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:56:33,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:56:33,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:56:33,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:56:33,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:56:33,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:56:33,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:56:33,749 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:56:33,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:56:33,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:56:33,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:56:33,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:56:33,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:56:33,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:56:33,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:56:33,752 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:56:33,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:56:33,752 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:56:33,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:56:33,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:56:33,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:56:33,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:56:33,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:56:33,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:56:33,753 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:56:33,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:56:33,753 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:56:33,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:56:33,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:56:33,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:56:33,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:56:33,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:56:33,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:56:33,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:56:33,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:56:33,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:56:33,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:56:33,756 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:56:33,756 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:56:33,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:56:33,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2022-07-13 21:56:33,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:56:33,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:56:33,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:56:33,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:56:33,936 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:56:33,936 INFO L432 ainManager$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 [2022-07-13 21:56:33,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b55417d4/493f19593f4a4f019679fb582bb6bef1/FLAGb14459aec [2022-07-13 21:56:34,398 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:56:34,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-07-13 21:56:34,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b55417d4/493f19593f4a4f019679fb582bb6bef1/FLAGb14459aec [2022-07-13 21:56:34,428 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b55417d4/493f19593f4a4f019679fb582bb6bef1 [2022-07-13 21:56:34,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:56:34,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:56:34,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:56:34,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:56:34,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:56:34,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af519d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34, skipping insertion in model container [2022-07-13 21:56:34,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:56:34,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:56:34,707 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] [2022-07-13 21:56:34,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:56:34,735 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:56:34,764 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] [2022-07-13 21:56:34,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:56:34,791 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:56:34,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34 WrapperNode [2022-07-13 21:56:34,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:56:34,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:56:34,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:56:34,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:56:34,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,822 INFO L137 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-13 21:56:34,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:56:34,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:56:34,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:56:34,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:56:34,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:56:34,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:56:34,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:56:34,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:56:34,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (1/1) ... [2022-07-13 21:56:34,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:56:34,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:34,877 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) [2022-07-13 21:56:34,879 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 [2022-07-13 21:56:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:56:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:56:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:56:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:56:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:56:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-13 21:56:34,909 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-13 21:56:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:56:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:56:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:56:34,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:56:34,910 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:56:34,985 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:56:34,986 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:56:35,187 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:56:35,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:56:35,193 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-13 21:56:35,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:56:35 BoogieIcfgContainer [2022-07-13 21:56:35,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:56:35,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:56:35,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:56:35,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:56:35,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:56:34" (1/3) ... [2022-07-13 21:56:35,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704421f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:56:35, skipping insertion in model container [2022-07-13 21:56:35,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:34" (2/3) ... [2022-07-13 21:56:35,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704421f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:56:35, skipping insertion in model container [2022-07-13 21:56:35,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:56:35" (3/3) ... [2022-07-13 21:56:35,225 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2022-07-13 21:56:35,229 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:56:35,235 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:56:35,235 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:56:35,236 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:56:35,274 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:35,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 211 flow [2022-07-13 21:56:35,345 INFO L129 PetriNetUnfolder]: 14/134 cut-off events. [2022-07-13 21:56:35,345 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:35,348 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. [2022-07-13 21:56:35,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 103 transitions, 211 flow [2022-07-13 21:56:35,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 103 transitions, 211 flow [2022-07-13 21:56:35,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:35,373 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:35,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:35,384 INFO L129 PetriNetUnfolder]: 4/77 cut-off events. [2022-07-13 21:56:35,385 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:35,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:35,385 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] [2022-07-13 21:56:35,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:35,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1011992479, now seen corresponding path program 1 times [2022-07-13 21:56:35,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:35,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806626130] [2022-07-13 21:56:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:35,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:35,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:35,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806626130] [2022-07-13 21:56:35,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806626130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:35,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:35,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:35,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063574416] [2022-07-13 21:56:35,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:35,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:35,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:35,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:35,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:35,620 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 103 [2022-07-13 21:56:35,622 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) [2022-07-13 21:56:35,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:35,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 103 [2022-07-13 21:56:35,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:35,661 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2022-07-13 21:56:35,661 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:35,662 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. [2022-07-13 21:56:35,662 INFO L132 encePairwiseOnDemand]: 93/103 looper letters, 1 selfloop transitions, 0 changer transitions 11/92 dead transitions. [2022-07-13 21:56:35,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 191 flow [2022-07-13 21:56:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2022-07-13 21:56:35,676 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9368932038834952 [2022-07-13 21:56:35,676 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2022-07-13 21:56:35,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2022-07-13 21:56:35,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:35,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2022-07-13 21:56:35,685 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) [2022-07-13 21:56:35,689 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) [2022-07-13 21:56:35,689 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) [2022-07-13 21:56:35,690 INFO L186 Difference]: Start difference. First operand has 96 places, 103 transitions, 211 flow. Second operand 2 states and 193 transitions. [2022-07-13 21:56:35,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 191 flow [2022-07-13 21:56:35,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:35,697 INFO L242 Difference]: Finished difference. Result has 96 places, 81 transitions, 167 flow [2022-07-13 21:56:35,698 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} [2022-07-13 21:56:35,701 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 0 predicate places. [2022-07-13 21:56:35,701 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 167 flow [2022-07-13 21:56:35,701 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) [2022-07-13 21:56:35,701 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:35,702 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:35,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:56:35,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:35,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1486023458, now seen corresponding path program 1 times [2022-07-13 21:56:35,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:35,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522098803] [2022-07-13 21:56:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:35,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:35,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:35,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522098803] [2022-07-13 21:56:35,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522098803] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:35,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:35,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:35,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996371272] [2022-07-13 21:56:35,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:35,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:35,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:35,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:35,812 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 103 [2022-07-13 21:56:35,812 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) [2022-07-13 21:56:35,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:35,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 103 [2022-07-13 21:56:35,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:35,850 INFO L129 PetriNetUnfolder]: 0/85 cut-off events. [2022-07-13 21:56:35,851 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:35,854 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. [2022-07-13 21:56:35,854 INFO L132 encePairwiseOnDemand]: 100/103 looper letters, 8 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-07-13 21:56:35,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 191 flow [2022-07-13 21:56:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2022-07-13 21:56:35,858 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8511326860841424 [2022-07-13 21:56:35,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2022-07-13 21:56:35,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2022-07-13 21:56:35,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:35,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2022-07-13 21:56:35,868 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) [2022-07-13 21:56:35,868 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) [2022-07-13 21:56:35,869 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) [2022-07-13 21:56:35,869 INFO L186 Difference]: Start difference. First operand has 96 places, 81 transitions, 167 flow. Second operand 3 states and 263 transitions. [2022-07-13 21:56:35,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 191 flow [2022-07-13 21:56:35,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:35,870 INFO L242 Difference]: Finished difference. Result has 88 places, 81 transitions, 175 flow [2022-07-13 21:56:35,871 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} [2022-07-13 21:56:35,873 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2022-07-13 21:56:35,873 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 175 flow [2022-07-13 21:56:35,873 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) [2022-07-13 21:56:35,873 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:35,873 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] [2022-07-13 21:56:35,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:56:35,874 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:35,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:35,874 INFO L85 PathProgramCache]: Analyzing trace with hash 455753518, now seen corresponding path program 1 times [2022-07-13 21:56:35,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:35,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309554628] [2022-07-13 21:56:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:35,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:35,926 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:35,965 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:35,965 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:35,966 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:35,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:35,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:56:35,968 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 21:56:35,972 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:35,972 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:56:36,002 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:36,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 284 flow [2022-07-13 21:56:36,028 INFO L129 PetriNetUnfolder]: 24/203 cut-off events. [2022-07-13 21:56:36,029 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:56:36,032 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. [2022-07-13 21:56:36,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 136 transitions, 284 flow [2022-07-13 21:56:36,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 136 transitions, 284 flow [2022-07-13 21:56:36,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:36,041 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:36,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:36,051 INFO L129 PetriNetUnfolder]: 5/81 cut-off events. [2022-07-13 21:56:36,051 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:36,051 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:36,051 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] [2022-07-13 21:56:36,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash -497376990, now seen corresponding path program 1 times [2022-07-13 21:56:36,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:36,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982789818] [2022-07-13 21:56:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:36,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:36,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982789818] [2022-07-13 21:56:36,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982789818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:36,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:36,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:36,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044232451] [2022-07-13 21:56:36,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:36,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:36,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:36,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:36,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:36,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 136 [2022-07-13 21:56:36,122 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) [2022-07-13 21:56:36,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:36,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 136 [2022-07-13 21:56:36,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:36,174 INFO L129 PetriNetUnfolder]: 0/154 cut-off events. [2022-07-13 21:56:36,176 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:56:36,176 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. [2022-07-13 21:56:36,177 INFO L132 encePairwiseOnDemand]: 117/136 looper letters, 11 selfloop transitions, 2 changer transitions 11/123 dead transitions. [2022-07-13 21:56:36,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 123 transitions, 284 flow [2022-07-13 21:56:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2022-07-13 21:56:36,180 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8995098039215687 [2022-07-13 21:56:36,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2022-07-13 21:56:36,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2022-07-13 21:56:36,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:36,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2022-07-13 21:56:36,182 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) [2022-07-13 21:56:36,183 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) [2022-07-13 21:56:36,184 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) [2022-07-13 21:56:36,184 INFO L186 Difference]: Start difference. First operand has 125 places, 136 transitions, 284 flow. Second operand 3 states and 367 transitions. [2022-07-13 21:56:36,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 123 transitions, 284 flow [2022-07-13 21:56:36,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 123 transitions, 282 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:36,187 INFO L242 Difference]: Finished difference. Result has 127 places, 109 transitions, 238 flow [2022-07-13 21:56:36,187 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} [2022-07-13 21:56:36,188 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 2 predicate places. [2022-07-13 21:56:36,188 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 238 flow [2022-07-13 21:56:36,188 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) [2022-07-13 21:56:36,188 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:36,189 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:36,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:56:36,189 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:36,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1229485238, now seen corresponding path program 1 times [2022-07-13 21:56:36,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:36,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142005974] [2022-07-13 21:56:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:36,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:36,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:36,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142005974] [2022-07-13 21:56:36,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142005974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431162159] [2022-07-13 21:56:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:36,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:36,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:36,234 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) [2022-07-13 21:56:36,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:56:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:36,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:36,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:36,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:36,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431162159] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:36,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:36,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:36,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441981903] [2022-07-13 21:56:36,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:36,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:36,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:36,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:36,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:36,496 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 136 [2022-07-13 21:56:36,497 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) [2022-07-13 21:56:36,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:36,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 136 [2022-07-13 21:56:36,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:36,593 INFO L129 PetriNetUnfolder]: 0/110 cut-off events. [2022-07-13 21:56:36,593 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:56:36,594 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. [2022-07-13 21:56:36,594 INFO L132 encePairwiseOnDemand]: 131/136 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-07-13 21:56:36,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 104 transitions, 258 flow [2022-07-13 21:56:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 999 transitions. [2022-07-13 21:56:36,597 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8161764705882353 [2022-07-13 21:56:36,597 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 999 transitions. [2022-07-13 21:56:36,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 999 transitions. [2022-07-13 21:56:36,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:36,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 999 transitions. [2022-07-13 21:56:36,600 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) [2022-07-13 21:56:36,602 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) [2022-07-13 21:56:36,603 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) [2022-07-13 21:56:36,603 INFO L186 Difference]: Start difference. First operand has 127 places, 109 transitions, 238 flow. Second operand 9 states and 999 transitions. [2022-07-13 21:56:36,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 104 transitions, 258 flow [2022-07-13 21:56:36,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:36,606 INFO L242 Difference]: Finished difference. Result has 112 places, 100 transitions, 230 flow [2022-07-13 21:56:36,607 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} [2022-07-13 21:56:36,608 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, -13 predicate places. [2022-07-13 21:56:36,608 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 230 flow [2022-07-13 21:56:36,609 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) [2022-07-13 21:56:36,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:36,609 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] [2022-07-13 21:56:36,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:36,827 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 [2022-07-13 21:56:36,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1842596803, now seen corresponding path program 1 times [2022-07-13 21:56:36,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561988733] [2022-07-13 21:56:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:36,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:36,847 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:36,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:36,904 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:36,904 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:36,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:36,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:56:36,904 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 21:56:36,905 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:36,905 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:56:36,932 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:36,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 359 flow [2022-07-13 21:56:36,968 INFO L129 PetriNetUnfolder]: 34/272 cut-off events. [2022-07-13 21:56:36,970 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:56:36,973 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. [2022-07-13 21:56:36,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 169 transitions, 359 flow [2022-07-13 21:56:36,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 169 transitions, 359 flow [2022-07-13 21:56:36,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:36,991 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:36,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:36,995 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-13 21:56:37,011 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:37,011 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:37,011 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] [2022-07-13 21:56:37,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash -56624670, now seen corresponding path program 1 times [2022-07-13 21:56:37,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:37,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750573274] [2022-07-13 21:56:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750573274] [2022-07-13 21:56:37,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750573274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:37,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:37,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:37,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415466839] [2022-07-13 21:56:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:37,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:37,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:37,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:37,084 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 169 [2022-07-13 21:56:37,084 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) [2022-07-13 21:56:37,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:37,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 169 [2022-07-13 21:56:37,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:37,150 INFO L129 PetriNetUnfolder]: 0/212 cut-off events. [2022-07-13 21:56:37,150 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:56:37,150 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. [2022-07-13 21:56:37,151 INFO L132 encePairwiseOnDemand]: 144/169 looper letters, 12 selfloop transitions, 2 changer transitions 11/150 dead transitions. [2022-07-13 21:56:37,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 150 transitions, 349 flow [2022-07-13 21:56:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2022-07-13 21:56:37,152 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8915187376725838 [2022-07-13 21:56:37,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2022-07-13 21:56:37,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2022-07-13 21:56:37,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:37,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2022-07-13 21:56:37,154 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) [2022-07-13 21:56:37,169 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) [2022-07-13 21:56:37,170 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) [2022-07-13 21:56:37,170 INFO L186 Difference]: Start difference. First operand has 154 places, 169 transitions, 359 flow. Second operand 3 states and 452 transitions. [2022-07-13 21:56:37,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 150 transitions, 349 flow [2022-07-13 21:56:37,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 150 transitions, 343 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:37,174 INFO L242 Difference]: Finished difference. Result has 156 places, 136 transitions, 297 flow [2022-07-13 21:56:37,175 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} [2022-07-13 21:56:37,176 INFO L279 CegarLoopForPetriNet]: 154 programPoint places, 2 predicate places. [2022-07-13 21:56:37,177 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 136 transitions, 297 flow [2022-07-13 21:56:37,177 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) [2022-07-13 21:56:37,178 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:37,178 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] [2022-07-13 21:56:37,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:56:37,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:37,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:37,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1053701942, now seen corresponding path program 1 times [2022-07-13 21:56:37,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:37,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385634810] [2022-07-13 21:56:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:37,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385634810] [2022-07-13 21:56:37,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385634810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:37,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143588799] [2022-07-13 21:56:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:37,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:37,265 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) [2022-07-13 21:56:37,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:56:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:37,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143588799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:37,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:37,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:37,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770435046] [2022-07-13 21:56:37,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:37,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:37,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:37,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:37,399 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 169 [2022-07-13 21:56:37,400 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) [2022-07-13 21:56:37,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:37,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 169 [2022-07-13 21:56:37,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:37,472 INFO L129 PetriNetUnfolder]: 0/157 cut-off events. [2022-07-13 21:56:37,473 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-13 21:56:37,473 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. [2022-07-13 21:56:37,473 INFO L132 encePairwiseOnDemand]: 163/169 looper letters, 13 selfloop transitions, 9 changer transitions 0/146 dead transitions. [2022-07-13 21:56:37,473 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 146 transitions, 363 flow [2022-07-13 21:56:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1239 transitions. [2022-07-13 21:56:37,475 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.814595660749507 [2022-07-13 21:56:37,475 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1239 transitions. [2022-07-13 21:56:37,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1239 transitions. [2022-07-13 21:56:37,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:37,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1239 transitions. [2022-07-13 21:56:37,478 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) [2022-07-13 21:56:37,479 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) [2022-07-13 21:56:37,480 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) [2022-07-13 21:56:37,480 INFO L186 Difference]: Start difference. First operand has 156 places, 136 transitions, 297 flow. Second operand 9 states and 1239 transitions. [2022-07-13 21:56:37,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 146 transitions, 363 flow [2022-07-13 21:56:37,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 146 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:37,482 INFO L242 Difference]: Finished difference. Result has 155 places, 142 transitions, 345 flow [2022-07-13 21:56:37,482 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} [2022-07-13 21:56:37,483 INFO L279 CegarLoopForPetriNet]: 154 programPoint places, 1 predicate places. [2022-07-13 21:56:37,483 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 142 transitions, 345 flow [2022-07-13 21:56:37,483 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) [2022-07-13 21:56:37,483 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:37,483 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] [2022-07-13 21:56:37,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:37,688 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 [2022-07-13 21:56:37,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:37,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1441395879, now seen corresponding path program 1 times [2022-07-13 21:56:37,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:37,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047553081] [2022-07-13 21:56:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:37,739 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:37,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:37,777 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:37,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:37,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:37,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:56:37,778 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 21:56:37,778 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:37,778 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:56:37,809 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:37,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 436 flow [2022-07-13 21:56:37,840 INFO L129 PetriNetUnfolder]: 44/341 cut-off events. [2022-07-13 21:56:37,840 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:56:37,842 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. [2022-07-13 21:56:37,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 202 transitions, 436 flow [2022-07-13 21:56:37,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 202 transitions, 436 flow [2022-07-13 21:56:37,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:37,845 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:37,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:37,848 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-13 21:56:37,848 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:37,848 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:37,849 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] [2022-07-13 21:56:37,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash 310264481, now seen corresponding path program 1 times [2022-07-13 21:56:37,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:37,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643927220] [2022-07-13 21:56:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:37,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643927220] [2022-07-13 21:56:37,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643927220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:37,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:37,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:37,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768370444] [2022-07-13 21:56:37,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:37,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:37,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:37,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:37,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:37,860 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 202 [2022-07-13 21:56:37,861 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) [2022-07-13 21:56:37,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:37,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 202 [2022-07-13 21:56:37,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:37,897 INFO L129 PetriNetUnfolder]: 0/292 cut-off events. [2022-07-13 21:56:37,898 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-13 21:56:37,898 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. [2022-07-13 21:56:37,898 INFO L132 encePairwiseOnDemand]: 174/202 looper letters, 4 selfloop transitions, 0 changer transitions 11/173 dead transitions. [2022-07-13 21:56:37,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 386 flow [2022-07-13 21:56:37,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 370 transitions. [2022-07-13 21:56:37,899 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9158415841584159 [2022-07-13 21:56:37,899 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 370 transitions. [2022-07-13 21:56:37,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 370 transitions. [2022-07-13 21:56:37,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:37,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 370 transitions. [2022-07-13 21:56:37,900 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) [2022-07-13 21:56:37,901 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) [2022-07-13 21:56:37,901 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) [2022-07-13 21:56:37,901 INFO L186 Difference]: Start difference. First operand has 183 places, 202 transitions, 436 flow. Second operand 2 states and 370 transitions. [2022-07-13 21:56:37,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 386 flow [2022-07-13 21:56:37,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 173 transitions, 374 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:37,903 INFO L242 Difference]: Finished difference. Result has 183 places, 162 transitions, 344 flow [2022-07-13 21:56:37,904 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} [2022-07-13 21:56:37,904 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, 0 predicate places. [2022-07-13 21:56:37,904 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 162 transitions, 344 flow [2022-07-13 21:56:37,904 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) [2022-07-13 21:56:37,904 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:37,904 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] [2022-07-13 21:56:37,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:56:37,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:37,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:37,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1486686878, now seen corresponding path program 1 times [2022-07-13 21:56:37,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:37,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975223999] [2022-07-13 21:56:37,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:37,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975223999] [2022-07-13 21:56:37,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975223999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:37,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:37,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:37,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802019624] [2022-07-13 21:56:37,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:37,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:37,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:37,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:37,920 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 202 [2022-07-13 21:56:37,921 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) [2022-07-13 21:56:37,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:37,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 202 [2022-07-13 21:56:37,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:37,950 INFO L129 PetriNetUnfolder]: 0/226 cut-off events. [2022-07-13 21:56:37,950 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 21:56:37,951 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. [2022-07-13 21:56:37,951 INFO L132 encePairwiseOnDemand]: 199/202 looper letters, 13 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2022-07-13 21:56:37,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 166 transitions, 382 flow [2022-07-13 21:56:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-07-13 21:56:37,953 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8283828382838284 [2022-07-13 21:56:37,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-07-13 21:56:37,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-07-13 21:56:37,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:37,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-07-13 21:56:37,954 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) [2022-07-13 21:56:37,955 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) [2022-07-13 21:56:37,955 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) [2022-07-13 21:56:37,955 INFO L186 Difference]: Start difference. First operand has 183 places, 162 transitions, 344 flow. Second operand 3 states and 502 transitions. [2022-07-13 21:56:37,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 166 transitions, 382 flow [2022-07-13 21:56:37,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 166 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:37,957 INFO L242 Difference]: Finished difference. Result has 175 places, 163 transitions, 356 flow [2022-07-13 21:56:37,957 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} [2022-07-13 21:56:37,958 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, -8 predicate places. [2022-07-13 21:56:37,958 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 163 transitions, 356 flow [2022-07-13 21:56:37,958 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) [2022-07-13 21:56:37,958 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:37,958 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] [2022-07-13 21:56:37,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:56:37,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:37,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2070147350, now seen corresponding path program 1 times [2022-07-13 21:56:37,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:37,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470779541] [2022-07-13 21:56:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:37,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470779541] [2022-07-13 21:56:37,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470779541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810282365] [2022-07-13 21:56:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:37,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:37,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:37,984 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) [2022-07-13 21:56:37,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:56:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:38,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:38,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810282365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:38,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:38,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:38,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957654703] [2022-07-13 21:56:38,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:38,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:38,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:38,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:38,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:38,096 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-07-13 21:56:38,097 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) [2022-07-13 21:56:38,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:38,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-07-13 21:56:38,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:38,169 INFO L129 PetriNetUnfolder]: 0/204 cut-off events. [2022-07-13 21:56:38,169 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:56:38,169 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. [2022-07-13 21:56:38,169 INFO L132 encePairwiseOnDemand]: 196/202 looper letters, 14 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-07-13 21:56:38,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 424 flow [2022-07-13 21:56:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1474 transitions. [2022-07-13 21:56:38,173 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8107810781078107 [2022-07-13 21:56:38,173 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1474 transitions. [2022-07-13 21:56:38,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1474 transitions. [2022-07-13 21:56:38,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:38,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1474 transitions. [2022-07-13 21:56:38,176 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) [2022-07-13 21:56:38,178 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) [2022-07-13 21:56:38,178 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) [2022-07-13 21:56:38,178 INFO L186 Difference]: Start difference. First operand has 175 places, 163 transitions, 356 flow. Second operand 9 states and 1474 transitions. [2022-07-13 21:56:38,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 424 flow [2022-07-13 21:56:38,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 173 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:38,181 INFO L242 Difference]: Finished difference. Result has 185 places, 169 transitions, 404 flow [2022-07-13 21:56:38,181 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} [2022-07-13 21:56:38,182 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, 2 predicate places. [2022-07-13 21:56:38,182 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 169 transitions, 404 flow [2022-07-13 21:56:38,183 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) [2022-07-13 21:56:38,183 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:38,183 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] [2022-07-13 21:56:38,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:38,399 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 [2022-07-13 21:56:38,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:38,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1101282751, now seen corresponding path program 1 times [2022-07-13 21:56:38,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:38,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633694794] [2022-07-13 21:56:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:38,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:38,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633694794] [2022-07-13 21:56:38,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633694794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216907963] [2022-07-13 21:56:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:38,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:38,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:38,469 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) [2022-07-13 21:56:38,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:56:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:38,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:38,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:38,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:38,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216907963] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:38,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:38,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:38,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826017668] [2022-07-13 21:56:38,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:38,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:38,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:38,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:38,658 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-07-13 21:56:38,660 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) [2022-07-13 21:56:38,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:38,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-07-13 21:56:38,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:38,805 INFO L129 PetriNetUnfolder]: 0/182 cut-off events. [2022-07-13 21:56:38,805 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-13 21:56:38,805 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. [2022-07-13 21:56:38,806 INFO L132 encePairwiseOnDemand]: 197/202 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-07-13 21:56:38,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 470 flow [2022-07-13 21:56:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:56:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-13 21:56:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2445 transitions. [2022-07-13 21:56:38,810 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.806930693069307 [2022-07-13 21:56:38,810 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2445 transitions. [2022-07-13 21:56:38,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2445 transitions. [2022-07-13 21:56:38,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:38,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2445 transitions. [2022-07-13 21:56:38,814 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) [2022-07-13 21:56:38,818 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) [2022-07-13 21:56:38,818 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) [2022-07-13 21:56:38,818 INFO L186 Difference]: Start difference. First operand has 185 places, 169 transitions, 404 flow. Second operand 15 states and 2445 transitions. [2022-07-13 21:56:38,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 470 flow [2022-07-13 21:56:38,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-13 21:56:38,838 INFO L242 Difference]: Finished difference. Result has 184 places, 161 transitions, 402 flow [2022-07-13 21:56:38,838 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} [2022-07-13 21:56:38,851 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, 1 predicate places. [2022-07-13 21:56:38,851 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 402 flow [2022-07-13 21:56:38,853 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) [2022-07-13 21:56:38,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:38,853 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] [2022-07-13 21:56:38,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:39,053 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 [2022-07-13 21:56:39,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:39,054 INFO L85 PathProgramCache]: Analyzing trace with hash -909920624, now seen corresponding path program 1 times [2022-07-13 21:56:39,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:39,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90034302] [2022-07-13 21:56:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:39,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:39,081 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:39,111 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:39,112 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:39,113 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:39,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:39,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:56:39,113 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:39,114 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:39,114 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-13 21:56:39,131 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:39,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 212 places, 235 transitions, 515 flow [2022-07-13 21:56:39,170 INFO L129 PetriNetUnfolder]: 54/410 cut-off events. [2022-07-13 21:56:39,171 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-13 21:56:39,175 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. [2022-07-13 21:56:39,175 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 235 transitions, 515 flow [2022-07-13 21:56:39,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 235 transitions, 515 flow [2022-07-13 21:56:39,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:39,181 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:39,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:39,184 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-13 21:56:39,184 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:39,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:39,184 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] [2022-07-13 21:56:39,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1304355041, now seen corresponding path program 1 times [2022-07-13 21:56:39,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:39,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626520562] [2022-07-13 21:56:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:39,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:39,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:39,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626520562] [2022-07-13 21:56:39,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626520562] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:39,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:39,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:39,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948526264] [2022-07-13 21:56:39,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:39,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:39,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:39,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:39,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:39,201 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 235 [2022-07-13 21:56:39,202 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) [2022-07-13 21:56:39,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:39,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 235 [2022-07-13 21:56:39,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:39,242 INFO L129 PetriNetUnfolder]: 0/350 cut-off events. [2022-07-13 21:56:39,242 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-07-13 21:56:39,242 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. [2022-07-13 21:56:39,243 INFO L132 encePairwiseOnDemand]: 201/235 looper letters, 5 selfloop transitions, 0 changer transitions 11/200 dead transitions. [2022-07-13 21:56:39,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 200 transitions, 455 flow [2022-07-13 21:56:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 429 transitions. [2022-07-13 21:56:39,244 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9127659574468086 [2022-07-13 21:56:39,244 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 429 transitions. [2022-07-13 21:56:39,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 429 transitions. [2022-07-13 21:56:39,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:39,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 429 transitions. [2022-07-13 21:56:39,245 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) [2022-07-13 21:56:39,246 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) [2022-07-13 21:56:39,246 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) [2022-07-13 21:56:39,246 INFO L186 Difference]: Start difference. First operand has 212 places, 235 transitions, 515 flow. Second operand 2 states and 429 transitions. [2022-07-13 21:56:39,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 200 transitions, 455 flow [2022-07-13 21:56:39,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 200 transitions, 435 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:39,249 INFO L242 Difference]: Finished difference. Result has 212 places, 189 transitions, 403 flow [2022-07-13 21:56:39,249 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} [2022-07-13 21:56:39,249 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, 0 predicate places. [2022-07-13 21:56:39,249 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 189 transitions, 403 flow [2022-07-13 21:56:39,250 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) [2022-07-13 21:56:39,250 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:39,250 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:39,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 21:56:39,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash -492596318, now seen corresponding path program 1 times [2022-07-13 21:56:39,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:39,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753514345] [2022-07-13 21:56:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:39,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:39,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:39,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753514345] [2022-07-13 21:56:39,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753514345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:39,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:39,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:39,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802467959] [2022-07-13 21:56:39,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:39,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:39,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:39,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:39,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:39,263 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 235 [2022-07-13 21:56:39,264 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) [2022-07-13 21:56:39,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:39,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 235 [2022-07-13 21:56:39,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:39,312 INFO L129 PetriNetUnfolder]: 0/273 cut-off events. [2022-07-13 21:56:39,312 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:56:39,312 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. [2022-07-13 21:56:39,313 INFO L132 encePairwiseOnDemand]: 232/235 looper letters, 14 selfloop transitions, 2 changer transitions 0/193 dead transitions. [2022-07-13 21:56:39,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 193 transitions, 443 flow [2022-07-13 21:56:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-07-13 21:56:39,314 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8241134751773049 [2022-07-13 21:56:39,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-07-13 21:56:39,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-07-13 21:56:39,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:39,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-07-13 21:56:39,316 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) [2022-07-13 21:56:39,316 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) [2022-07-13 21:56:39,317 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) [2022-07-13 21:56:39,317 INFO L186 Difference]: Start difference. First operand has 212 places, 189 transitions, 403 flow. Second operand 3 states and 581 transitions. [2022-07-13 21:56:39,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 193 transitions, 443 flow [2022-07-13 21:56:39,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 193 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:39,319 INFO L242 Difference]: Finished difference. Result has 204 places, 190 transitions, 415 flow [2022-07-13 21:56:39,319 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} [2022-07-13 21:56:39,320 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, -8 predicate places. [2022-07-13 21:56:39,320 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 190 transitions, 415 flow [2022-07-13 21:56:39,320 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) [2022-07-13 21:56:39,320 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:39,320 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:39,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 21:56:39,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:39,321 INFO L85 PathProgramCache]: Analyzing trace with hash -16145834, now seen corresponding path program 1 times [2022-07-13 21:56:39,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:39,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136958448] [2022-07-13 21:56:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:39,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:39,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:39,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136958448] [2022-07-13 21:56:39,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136958448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:39,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235110104] [2022-07-13 21:56:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:39,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:39,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:39,344 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) [2022-07-13 21:56:39,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:56:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:39,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:39,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:39,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:39,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235110104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:39,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:39,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:39,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696138187] [2022-07-13 21:56:39,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:39,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:39,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:39,471 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-07-13 21:56:39,472 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) [2022-07-13 21:56:39,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:39,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-07-13 21:56:39,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:39,545 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2022-07-13 21:56:39,545 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:56:39,546 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. [2022-07-13 21:56:39,546 INFO L132 encePairwiseOnDemand]: 229/235 looper letters, 15 selfloop transitions, 9 changer transitions 0/200 dead transitions. [2022-07-13 21:56:39,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 200 transitions, 485 flow [2022-07-13 21:56:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1709 transitions. [2022-07-13 21:56:39,549 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8080378250591016 [2022-07-13 21:56:39,549 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1709 transitions. [2022-07-13 21:56:39,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1709 transitions. [2022-07-13 21:56:39,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:39,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1709 transitions. [2022-07-13 21:56:39,552 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) [2022-07-13 21:56:39,555 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) [2022-07-13 21:56:39,556 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) [2022-07-13 21:56:39,556 INFO L186 Difference]: Start difference. First operand has 204 places, 190 transitions, 415 flow. Second operand 9 states and 1709 transitions. [2022-07-13 21:56:39,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 200 transitions, 485 flow [2022-07-13 21:56:39,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 200 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:39,559 INFO L242 Difference]: Finished difference. Result has 214 places, 196 transitions, 463 flow [2022-07-13 21:56:39,559 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} [2022-07-13 21:56:39,560 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, 2 predicate places. [2022-07-13 21:56:39,560 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 196 transitions, 463 flow [2022-07-13 21:56:39,570 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) [2022-07-13 21:56:39,570 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:39,570 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] [2022-07-13 21:56:39,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:39,786 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 [2022-07-13 21:56:39,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:39,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2021107327, now seen corresponding path program 1 times [2022-07-13 21:56:39,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:39,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654742853] [2022-07-13 21:56:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:39,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:39,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654742853] [2022-07-13 21:56:39,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654742853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:39,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526664319] [2022-07-13 21:56:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:39,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:39,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:39,882 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) [2022-07-13 21:56:39,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:56:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:39,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:39,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:40,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:40,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526664319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:40,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:40,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:40,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138183107] [2022-07-13 21:56:40,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:40,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:40,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:40,077 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-07-13 21:56:40,080 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) [2022-07-13 21:56:40,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:40,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-07-13 21:56:40,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:40,193 INFO L129 PetriNetUnfolder]: 0/218 cut-off events. [2022-07-13 21:56:40,193 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-13 21:56:40,193 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. [2022-07-13 21:56:40,194 INFO L132 encePairwiseOnDemand]: 230/235 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-07-13 21:56:40,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 200 transitions, 565 flow [2022-07-13 21:56:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 21:56:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 21:56:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3403 transitions. [2022-07-13 21:56:40,199 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8044917257683215 [2022-07-13 21:56:40,199 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3403 transitions. [2022-07-13 21:56:40,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3403 transitions. [2022-07-13 21:56:40,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:40,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3403 transitions. [2022-07-13 21:56:40,206 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) [2022-07-13 21:56:40,210 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) [2022-07-13 21:56:40,211 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) [2022-07-13 21:56:40,211 INFO L186 Difference]: Start difference. First operand has 214 places, 196 transitions, 463 flow. Second operand 18 states and 3403 transitions. [2022-07-13 21:56:40,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 200 transitions, 565 flow [2022-07-13 21:56:40,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-13 21:56:40,215 INFO L242 Difference]: Finished difference. Result has 216 places, 191 transitions, 480 flow [2022-07-13 21:56:40,215 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} [2022-07-13 21:56:40,215 INFO L279 CegarLoopForPetriNet]: 212 programPoint places, 4 predicate places. [2022-07-13 21:56:40,215 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 191 transitions, 480 flow [2022-07-13 21:56:40,216 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) [2022-07-13 21:56:40,217 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:40,217 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] [2022-07-13 21:56:40,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:40,433 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 [2022-07-13 21:56:40,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:40,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:40,434 INFO L85 PathProgramCache]: Analyzing trace with hash -30972408, now seen corresponding path program 1 times [2022-07-13 21:56:40,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:40,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033794019] [2022-07-13 21:56:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:40,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:40,446 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:40,470 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:40,470 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:40,470 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:40,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:40,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 21:56:40,471 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:40,471 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:40,471 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-13 21:56:40,508 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:40,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 268 transitions, 596 flow [2022-07-13 21:56:40,592 INFO L129 PetriNetUnfolder]: 64/479 cut-off events. [2022-07-13 21:56:40,592 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-13 21:56:40,596 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. [2022-07-13 21:56:40,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 268 transitions, 596 flow [2022-07-13 21:56:40,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 268 transitions, 596 flow [2022-07-13 21:56:40,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:40,601 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:40,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:40,604 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-13 21:56:40,604 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:40,604 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:40,605 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] [2022-07-13 21:56:40,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:40,605 INFO L85 PathProgramCache]: Analyzing trace with hash 427631073, now seen corresponding path program 1 times [2022-07-13 21:56:40,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:40,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865877060] [2022-07-13 21:56:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:40,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:40,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:40,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865877060] [2022-07-13 21:56:40,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865877060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:40,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:40,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:40,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945073258] [2022-07-13 21:56:40,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:40,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:40,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:40,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:40,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:40,616 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 268 [2022-07-13 21:56:40,616 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) [2022-07-13 21:56:40,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:40,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 268 [2022-07-13 21:56:40,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:40,664 INFO L129 PetriNetUnfolder]: 0/408 cut-off events. [2022-07-13 21:56:40,664 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-07-13 21:56:40,665 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. [2022-07-13 21:56:40,665 INFO L132 encePairwiseOnDemand]: 228/268 looper letters, 6 selfloop transitions, 0 changer transitions 11/227 dead transitions. [2022-07-13 21:56:40,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 526 flow [2022-07-13 21:56:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 488 transitions. [2022-07-13 21:56:40,667 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9104477611940298 [2022-07-13 21:56:40,667 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 488 transitions. [2022-07-13 21:56:40,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 488 transitions. [2022-07-13 21:56:40,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:40,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 488 transitions. [2022-07-13 21:56:40,668 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) [2022-07-13 21:56:40,668 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) [2022-07-13 21:56:40,668 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) [2022-07-13 21:56:40,669 INFO L186 Difference]: Start difference. First operand has 241 places, 268 transitions, 596 flow. Second operand 2 states and 488 transitions. [2022-07-13 21:56:40,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 526 flow [2022-07-13 21:56:40,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 227 transitions, 496 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:40,671 INFO L242 Difference]: Finished difference. Result has 241 places, 216 transitions, 462 flow [2022-07-13 21:56:40,672 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} [2022-07-13 21:56:40,672 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 0 predicate places. [2022-07-13 21:56:40,672 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 216 transitions, 462 flow [2022-07-13 21:56:40,672 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) [2022-07-13 21:56:40,672 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:40,672 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] [2022-07-13 21:56:40,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 21:56:40,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:40,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1369320286, now seen corresponding path program 1 times [2022-07-13 21:56:40,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:40,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452617114] [2022-07-13 21:56:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:40,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:40,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:40,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452617114] [2022-07-13 21:56:40,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452617114] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:40,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:40,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:40,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015535565] [2022-07-13 21:56:40,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:40,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:40,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:40,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:40,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:40,685 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 268 [2022-07-13 21:56:40,686 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) [2022-07-13 21:56:40,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:40,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 268 [2022-07-13 21:56:40,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:40,731 INFO L129 PetriNetUnfolder]: 0/320 cut-off events. [2022-07-13 21:56:40,731 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-13 21:56:40,731 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. [2022-07-13 21:56:40,732 INFO L132 encePairwiseOnDemand]: 265/268 looper letters, 15 selfloop transitions, 2 changer transitions 0/220 dead transitions. [2022-07-13 21:56:40,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 220 transitions, 504 flow [2022-07-13 21:56:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2022-07-13 21:56:40,734 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8208955223880597 [2022-07-13 21:56:40,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2022-07-13 21:56:40,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2022-07-13 21:56:40,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:40,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2022-07-13 21:56:40,735 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) [2022-07-13 21:56:40,736 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) [2022-07-13 21:56:40,736 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) [2022-07-13 21:56:40,736 INFO L186 Difference]: Start difference. First operand has 241 places, 216 transitions, 462 flow. Second operand 3 states and 660 transitions. [2022-07-13 21:56:40,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 220 transitions, 504 flow [2022-07-13 21:56:40,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 220 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:40,739 INFO L242 Difference]: Finished difference. Result has 233 places, 217 transitions, 474 flow [2022-07-13 21:56:40,739 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} [2022-07-13 21:56:40,740 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, -8 predicate places. [2022-07-13 21:56:40,740 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 217 transitions, 474 flow [2022-07-13 21:56:40,740 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) [2022-07-13 21:56:40,740 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:40,740 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] [2022-07-13 21:56:40,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 21:56:40,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:40,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash -910210314, now seen corresponding path program 1 times [2022-07-13 21:56:40,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:40,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639010074] [2022-07-13 21:56:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:40,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:40,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:40,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639010074] [2022-07-13 21:56:40,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639010074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:40,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747887324] [2022-07-13 21:56:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:40,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:40,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:40,763 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) [2022-07-13 21:56:40,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 21:56:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:40,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:40,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:40,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747887324] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:40,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:40,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556405185] [2022-07-13 21:56:40,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:40,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:40,897 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-07-13 21:56:40,898 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) [2022-07-13 21:56:40,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:40,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-07-13 21:56:40,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:40,995 INFO L129 PetriNetUnfolder]: 0/298 cut-off events. [2022-07-13 21:56:40,995 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 21:56:40,995 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. [2022-07-13 21:56:40,996 INFO L132 encePairwiseOnDemand]: 262/268 looper letters, 16 selfloop transitions, 9 changer transitions 0/227 dead transitions. [2022-07-13 21:56:40,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 546 flow [2022-07-13 21:56:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1944 transitions. [2022-07-13 21:56:41,001 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8059701492537313 [2022-07-13 21:56:41,001 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1944 transitions. [2022-07-13 21:56:41,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1944 transitions. [2022-07-13 21:56:41,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:41,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1944 transitions. [2022-07-13 21:56:41,005 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) [2022-07-13 21:56:41,007 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) [2022-07-13 21:56:41,008 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) [2022-07-13 21:56:41,008 INFO L186 Difference]: Start difference. First operand has 233 places, 217 transitions, 474 flow. Second operand 9 states and 1944 transitions. [2022-07-13 21:56:41,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 546 flow [2022-07-13 21:56:41,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 227 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:41,011 INFO L242 Difference]: Finished difference. Result has 243 places, 223 transitions, 522 flow [2022-07-13 21:56:41,012 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} [2022-07-13 21:56:41,012 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 2 predicate places. [2022-07-13 21:56:41,012 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 223 transitions, 522 flow [2022-07-13 21:56:41,013 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) [2022-07-13 21:56:41,013 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:41,013 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] [2022-07-13 21:56:41,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:41,234 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 [2022-07-13 21:56:41,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1557677727, now seen corresponding path program 1 times [2022-07-13 21:56:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:41,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505394615] [2022-07-13 21:56:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:41,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505394615] [2022-07-13 21:56:41,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505394615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:41,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120526003] [2022-07-13 21:56:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:41,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:41,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:41,291 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) [2022-07-13 21:56:41,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 21:56:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:41,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:41,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120526003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:41,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:41,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:41,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43862359] [2022-07-13 21:56:41,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:41,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:41,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:41,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:41,512 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-07-13 21:56:41,514 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) [2022-07-13 21:56:41,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:41,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-07-13 21:56:41,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:41,694 INFO L129 PetriNetUnfolder]: 0/254 cut-off events. [2022-07-13 21:56:41,695 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-13 21:56:41,695 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. [2022-07-13 21:56:41,695 INFO L132 encePairwiseOnDemand]: 263/268 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-07-13 21:56:41,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 232 transitions, 660 flow [2022-07-13 21:56:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4517 transitions. [2022-07-13 21:56:41,699 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8025941719971571 [2022-07-13 21:56:41,699 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4517 transitions. [2022-07-13 21:56:41,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4517 transitions. [2022-07-13 21:56:41,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:41,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4517 transitions. [2022-07-13 21:56:41,704 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) [2022-07-13 21:56:41,710 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) [2022-07-13 21:56:41,711 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) [2022-07-13 21:56:41,711 INFO L186 Difference]: Start difference. First operand has 243 places, 223 transitions, 522 flow. Second operand 21 states and 4517 transitions. [2022-07-13 21:56:41,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 232 transitions, 660 flow [2022-07-13 21:56:41,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-13 21:56:41,715 INFO L242 Difference]: Finished difference. Result has 248 places, 221 transitions, 558 flow [2022-07-13 21:56:41,715 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} [2022-07-13 21:56:41,715 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 7 predicate places. [2022-07-13 21:56:41,715 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 221 transitions, 558 flow [2022-07-13 21:56:41,716 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) [2022-07-13 21:56:41,716 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:41,716 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] [2022-07-13 21:56:41,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:41,933 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 [2022-07-13 21:56:41,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1257008543, now seen corresponding path program 1 times [2022-07-13 21:56:41,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997528379] [2022-07-13 21:56:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:41,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:41,953 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:41,978 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:41,978 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:41,978 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:41,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:41,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 21:56:41,979 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:41,979 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:41,979 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-13 21:56:41,994 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:41,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 270 places, 301 transitions, 679 flow [2022-07-13 21:56:42,049 INFO L129 PetriNetUnfolder]: 74/548 cut-off events. [2022-07-13 21:56:42,049 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-13 21:56:42,056 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. [2022-07-13 21:56:42,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 301 transitions, 679 flow [2022-07-13 21:56:42,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 301 transitions, 679 flow [2022-07-13 21:56:42,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:42,063 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:42,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:42,066 INFO L129 PetriNetUnfolder]: 4/79 cut-off events. [2022-07-13 21:56:42,066 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:42,066 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:42,066 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] [2022-07-13 21:56:42,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:42,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:42,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1975059873, now seen corresponding path program 1 times [2022-07-13 21:56:42,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:42,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469790082] [2022-07-13 21:56:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:42,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:42,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469790082] [2022-07-13 21:56:42,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469790082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:42,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:42,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:42,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593268511] [2022-07-13 21:56:42,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:42,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:42,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:42,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:42,077 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 301 [2022-07-13 21:56:42,077 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) [2022-07-13 21:56:42,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:42,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 301 [2022-07-13 21:56:42,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:42,168 INFO L129 PetriNetUnfolder]: 0/466 cut-off events. [2022-07-13 21:56:42,169 INFO L130 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-07-13 21:56:42,169 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. [2022-07-13 21:56:42,172 INFO L132 encePairwiseOnDemand]: 255/301 looper letters, 7 selfloop transitions, 0 changer transitions 11/254 dead transitions. [2022-07-13 21:56:42,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 599 flow [2022-07-13 21:56:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 547 transitions. [2022-07-13 21:56:42,173 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9086378737541528 [2022-07-13 21:56:42,173 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 547 transitions. [2022-07-13 21:56:42,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 547 transitions. [2022-07-13 21:56:42,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:42,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 547 transitions. [2022-07-13 21:56:42,174 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) [2022-07-13 21:56:42,175 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) [2022-07-13 21:56:42,175 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) [2022-07-13 21:56:42,176 INFO L186 Difference]: Start difference. First operand has 270 places, 301 transitions, 679 flow. Second operand 2 states and 547 transitions. [2022-07-13 21:56:42,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 599 flow [2022-07-13 21:56:42,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 254 transitions, 557 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:42,179 INFO L242 Difference]: Finished difference. Result has 270 places, 243 transitions, 521 flow [2022-07-13 21:56:42,179 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} [2022-07-13 21:56:42,180 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 0 predicate places. [2022-07-13 21:56:42,180 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 243 transitions, 521 flow [2022-07-13 21:56:42,180 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) [2022-07-13 21:56:42,180 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:42,180 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] [2022-07-13 21:56:42,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 21:56:42,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash 178108514, now seen corresponding path program 1 times [2022-07-13 21:56:42,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:42,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413554806] [2022-07-13 21:56:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:42,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:42,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413554806] [2022-07-13 21:56:42,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413554806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:42,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:42,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:42,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553473763] [2022-07-13 21:56:42,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:42,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:42,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:42,207 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 301 [2022-07-13 21:56:42,207 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) [2022-07-13 21:56:42,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:42,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 301 [2022-07-13 21:56:42,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:42,264 INFO L129 PetriNetUnfolder]: 0/367 cut-off events. [2022-07-13 21:56:42,265 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:56:42,265 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. [2022-07-13 21:56:42,266 INFO L132 encePairwiseOnDemand]: 298/301 looper letters, 16 selfloop transitions, 2 changer transitions 0/247 dead transitions. [2022-07-13 21:56:42,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 247 transitions, 565 flow [2022-07-13 21:56:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2022-07-13 21:56:42,268 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8183831672203765 [2022-07-13 21:56:42,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2022-07-13 21:56:42,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2022-07-13 21:56:42,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:42,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2022-07-13 21:56:42,270 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) [2022-07-13 21:56:42,271 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) [2022-07-13 21:56:42,272 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) [2022-07-13 21:56:42,272 INFO L186 Difference]: Start difference. First operand has 270 places, 243 transitions, 521 flow. Second operand 3 states and 739 transitions. [2022-07-13 21:56:42,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 247 transitions, 565 flow [2022-07-13 21:56:42,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 247 transitions, 565 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:42,275 INFO L242 Difference]: Finished difference. Result has 262 places, 244 transitions, 533 flow [2022-07-13 21:56:42,276 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} [2022-07-13 21:56:42,276 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, -8 predicate places. [2022-07-13 21:56:42,276 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 244 transitions, 533 flow [2022-07-13 21:56:42,276 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) [2022-07-13 21:56:42,276 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:42,277 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] [2022-07-13 21:56:42,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 21:56:42,277 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash -612046090, now seen corresponding path program 1 times [2022-07-13 21:56:42,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:42,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40810896] [2022-07-13 21:56:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:42,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40810896] [2022-07-13 21:56:42,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40810896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334032804] [2022-07-13 21:56:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:42,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:42,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:42,305 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) [2022-07-13 21:56:42,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 21:56:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:42,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334032804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:42,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:42,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:42,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311087804] [2022-07-13 21:56:42,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:42,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:42,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:42,462 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-07-13 21:56:42,464 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) [2022-07-13 21:56:42,464 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:42,464 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-07-13 21:56:42,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:42,572 INFO L129 PetriNetUnfolder]: 0/345 cut-off events. [2022-07-13 21:56:42,572 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-13 21:56:42,572 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. [2022-07-13 21:56:42,573 INFO L132 encePairwiseOnDemand]: 295/301 looper letters, 17 selfloop transitions, 9 changer transitions 0/254 dead transitions. [2022-07-13 21:56:42,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 607 flow [2022-07-13 21:56:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2179 transitions. [2022-07-13 21:56:42,576 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8043558508674787 [2022-07-13 21:56:42,576 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2179 transitions. [2022-07-13 21:56:42,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2179 transitions. [2022-07-13 21:56:42,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:42,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2179 transitions. [2022-07-13 21:56:42,579 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) [2022-07-13 21:56:42,581 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) [2022-07-13 21:56:42,581 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) [2022-07-13 21:56:42,582 INFO L186 Difference]: Start difference. First operand has 262 places, 244 transitions, 533 flow. Second operand 9 states and 2179 transitions. [2022-07-13 21:56:42,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 607 flow [2022-07-13 21:56:42,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 254 transitions, 605 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:42,585 INFO L242 Difference]: Finished difference. Result has 272 places, 250 transitions, 581 flow [2022-07-13 21:56:42,585 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} [2022-07-13 21:56:42,586 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 2 predicate places. [2022-07-13 21:56:42,586 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 250 transitions, 581 flow [2022-07-13 21:56:42,586 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) [2022-07-13 21:56:42,587 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:42,587 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] [2022-07-13 21:56:42,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:42,803 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 [2022-07-13 21:56:42,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash 289006049, now seen corresponding path program 1 times [2022-07-13 21:56:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:42,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4218676] [2022-07-13 21:56:42,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:42,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:42,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4218676] [2022-07-13 21:56:42,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4218676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:42,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168811914] [2022-07-13 21:56:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:42,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:42,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:42,853 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) [2022-07-13 21:56:42,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 21:56:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:42,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:42,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:43,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168811914] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:43,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:43,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:43,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939286139] [2022-07-13 21:56:43,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:43,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:43,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:43,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:43,087 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-07-13 21:56:43,089 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) [2022-07-13 21:56:43,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:43,089 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-07-13 21:56:43,089 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:43,268 INFO L129 PetriNetUnfolder]: 0/301 cut-off events. [2022-07-13 21:56:43,268 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-13 21:56:43,268 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. [2022-07-13 21:56:43,269 INFO L132 encePairwiseOnDemand]: 295/301 looper letters, 25 selfloop transitions, 21 changer transitions 0/274 dead transitions. [2022-07-13 21:56:43,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 274 transitions, 781 flow [2022-07-13 21:56:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5069 transitions. [2022-07-13 21:56:43,274 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8019300743553235 [2022-07-13 21:56:43,274 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5069 transitions. [2022-07-13 21:56:43,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5069 transitions. [2022-07-13 21:56:43,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:43,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5069 transitions. [2022-07-13 21:56:43,280 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) [2022-07-13 21:56:43,285 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) [2022-07-13 21:56:43,286 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) [2022-07-13 21:56:43,286 INFO L186 Difference]: Start difference. First operand has 272 places, 250 transitions, 581 flow. Second operand 21 states and 5069 transitions. [2022-07-13 21:56:43,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 274 transitions, 781 flow [2022-07-13 21:56:43,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 274 transitions, 767 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:43,291 INFO L242 Difference]: Finished difference. Result has 296 places, 263 transitions, 705 flow [2022-07-13 21:56:43,291 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} [2022-07-13 21:56:43,292 INFO L279 CegarLoopForPetriNet]: 270 programPoint places, 26 predicate places. [2022-07-13 21:56:43,292 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 263 transitions, 705 flow [2022-07-13 21:56:43,293 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) [2022-07-13 21:56:43,293 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:43,293 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] [2022-07-13 21:56:43,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:43,511 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 [2022-07-13 21:56:43,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash -143485893, now seen corresponding path program 1 times [2022-07-13 21:56:43,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:43,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282291425] [2022-07-13 21:56:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:43,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:43,555 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:43,575 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:43,575 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:43,575 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:43,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:43,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-13 21:56:43,575 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:43,576 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:43,576 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-13 21:56:43,594 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:43,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 299 places, 334 transitions, 764 flow [2022-07-13 21:56:43,664 INFO L129 PetriNetUnfolder]: 84/617 cut-off events. [2022-07-13 21:56:43,665 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-13 21:56:43,675 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. [2022-07-13 21:56:43,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 334 transitions, 764 flow [2022-07-13 21:56:43,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 334 transitions, 764 flow [2022-07-13 21:56:43,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:43,682 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:43,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:43,685 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-13 21:56:43,685 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:43,685 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:43,685 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:43,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:43,686 INFO L85 PathProgramCache]: Analyzing trace with hash -145277214, now seen corresponding path program 1 times [2022-07-13 21:56:43,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:43,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796389116] [2022-07-13 21:56:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:43,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:43,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:43,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796389116] [2022-07-13 21:56:43,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796389116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:43,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:43,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:43,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611957574] [2022-07-13 21:56:43,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:43,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:43,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:43,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:43,700 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 334 [2022-07-13 21:56:43,701 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) [2022-07-13 21:56:43,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:43,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 334 [2022-07-13 21:56:43,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:43,810 INFO L129 PetriNetUnfolder]: 0/502 cut-off events. [2022-07-13 21:56:43,810 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-13 21:56:43,811 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. [2022-07-13 21:56:43,811 INFO L132 encePairwiseOnDemand]: 279/334 looper letters, 17 selfloop transitions, 2 changer transitions 11/285 dead transitions. [2022-07-13 21:56:43,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 285 transitions, 704 flow [2022-07-13 21:56:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2022-07-13 21:56:43,813 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.875249500998004 [2022-07-13 21:56:43,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2022-07-13 21:56:43,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2022-07-13 21:56:43,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:43,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2022-07-13 21:56:43,815 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) [2022-07-13 21:56:43,816 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) [2022-07-13 21:56:43,816 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) [2022-07-13 21:56:43,816 INFO L186 Difference]: Start difference. First operand has 299 places, 334 transitions, 764 flow. Second operand 3 states and 877 transitions. [2022-07-13 21:56:43,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 285 transitions, 704 flow [2022-07-13 21:56:43,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 285 transitions, 648 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:43,819 INFO L242 Difference]: Finished difference. Result has 301 places, 271 transitions, 592 flow [2022-07-13 21:56:43,820 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} [2022-07-13 21:56:43,821 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 2 predicate places. [2022-07-13 21:56:43,821 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 271 transitions, 592 flow [2022-07-13 21:56:43,821 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) [2022-07-13 21:56:43,821 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:43,821 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] [2022-07-13 21:56:43,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-13 21:56:43,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:43,821 INFO L85 PathProgramCache]: Analyzing trace with hash 878346838, now seen corresponding path program 1 times [2022-07-13 21:56:43,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:43,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630262252] [2022-07-13 21:56:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:43,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:43,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630262252] [2022-07-13 21:56:43,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630262252] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99293996] [2022-07-13 21:56:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:43,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:43,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:43,868 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) [2022-07-13 21:56:43,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 21:56:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:43,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:44,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:44,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99293996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:44,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:44,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:44,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501372392] [2022-07-13 21:56:44,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:44,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:44,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:44,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:44,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:44,037 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-07-13 21:56:44,038 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) [2022-07-13 21:56:44,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:44,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-07-13 21:56:44,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:44,143 INFO L129 PetriNetUnfolder]: 0/392 cut-off events. [2022-07-13 21:56:44,143 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-13 21:56:44,143 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. [2022-07-13 21:56:44,144 INFO L132 encePairwiseOnDemand]: 328/334 looper letters, 18 selfloop transitions, 9 changer transitions 0/281 dead transitions. [2022-07-13 21:56:44,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 281 transitions, 668 flow [2022-07-13 21:56:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:44,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2414 transitions. [2022-07-13 21:56:44,147 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8030605455755156 [2022-07-13 21:56:44,147 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2414 transitions. [2022-07-13 21:56:44,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2414 transitions. [2022-07-13 21:56:44,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:44,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2414 transitions. [2022-07-13 21:56:44,153 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) [2022-07-13 21:56:44,155 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) [2022-07-13 21:56:44,156 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) [2022-07-13 21:56:44,156 INFO L186 Difference]: Start difference. First operand has 301 places, 271 transitions, 592 flow. Second operand 9 states and 2414 transitions. [2022-07-13 21:56:44,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 281 transitions, 668 flow [2022-07-13 21:56:44,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 281 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:44,160 INFO L242 Difference]: Finished difference. Result has 300 places, 277 transitions, 640 flow [2022-07-13 21:56:44,160 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} [2022-07-13 21:56:44,160 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 1 predicate places. [2022-07-13 21:56:44,160 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 277 transitions, 640 flow [2022-07-13 21:56:44,161 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) [2022-07-13 21:56:44,161 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:44,161 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] [2022-07-13 21:56:44,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:44,392 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 [2022-07-13 21:56:44,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:44,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash -776023295, now seen corresponding path program 1 times [2022-07-13 21:56:44,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:44,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198033701] [2022-07-13 21:56:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:44,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:44,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:44,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198033701] [2022-07-13 21:56:44,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198033701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:44,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957648930] [2022-07-13 21:56:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:44,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:44,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:44,515 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) [2022-07-13 21:56:44,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 21:56:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:44,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:44,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:44,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957648930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:44,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:44,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:44,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952951167] [2022-07-13 21:56:44,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:44,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:44,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:44,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:44,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:44,749 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-07-13 21:56:44,751 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) [2022-07-13 21:56:44,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:44,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-07-13 21:56:44,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:44,945 INFO L129 PetriNetUnfolder]: 0/348 cut-off events. [2022-07-13 21:56:44,945 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-13 21:56:44,945 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. [2022-07-13 21:56:44,946 INFO L132 encePairwiseOnDemand]: 328/334 looper letters, 26 selfloop transitions, 21 changer transitions 0/301 dead transitions. [2022-07-13 21:56:44,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 301 transitions, 842 flow [2022-07-13 21:56:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5616 transitions. [2022-07-13 21:56:44,949 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8006843455945253 [2022-07-13 21:56:44,949 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5616 transitions. [2022-07-13 21:56:44,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5616 transitions. [2022-07-13 21:56:44,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:44,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5616 transitions. [2022-07-13 21:56:44,956 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) [2022-07-13 21:56:44,962 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) [2022-07-13 21:56:44,962 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) [2022-07-13 21:56:44,962 INFO L186 Difference]: Start difference. First operand has 300 places, 277 transitions, 640 flow. Second operand 21 states and 5616 transitions. [2022-07-13 21:56:44,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 301 transitions, 842 flow [2022-07-13 21:56:44,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 301 transitions, 828 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:44,967 INFO L242 Difference]: Finished difference. Result has 324 places, 290 transitions, 764 flow [2022-07-13 21:56:44,967 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} [2022-07-13 21:56:44,967 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 25 predicate places. [2022-07-13 21:56:44,968 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 290 transitions, 764 flow [2022-07-13 21:56:44,968 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) [2022-07-13 21:56:44,968 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:44,969 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] [2022-07-13 21:56:45,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:45,200 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 [2022-07-13 21:56:45,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:45,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1408771997, now seen corresponding path program 1 times [2022-07-13 21:56:45,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:45,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95590103] [2022-07-13 21:56:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:45,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:45,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95590103] [2022-07-13 21:56:45,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95590103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924712353] [2022-07-13 21:56:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:45,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:45,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:45,323 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) [2022-07-13 21:56:45,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 21:56:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:56:45,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:45,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:45,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924712353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:45,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:45,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:56:45,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909278899] [2022-07-13 21:56:45,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:45,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:56:45,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:45,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:56:45,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:56:45,774 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-07-13 21:56:45,797 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) [2022-07-13 21:56:45,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:45,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-07-13 21:56:45,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:46,053 INFO L129 PetriNetUnfolder]: 0/326 cut-off events. [2022-07-13 21:56:46,053 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-13 21:56:46,054 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. [2022-07-13 21:56:46,054 INFO L132 encePairwiseOnDemand]: 329/334 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-07-13 21:56:46,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 296 transitions, 912 flow [2022-07-13 21:56:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 21:56:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-13 21:56:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7209 transitions. [2022-07-13 21:56:46,059 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7994011976047904 [2022-07-13 21:56:46,059 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7209 transitions. [2022-07-13 21:56:46,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7209 transitions. [2022-07-13 21:56:46,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:46,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7209 transitions. [2022-07-13 21:56:46,068 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) [2022-07-13 21:56:46,074 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) [2022-07-13 21:56:46,075 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) [2022-07-13 21:56:46,075 INFO L186 Difference]: Start difference. First operand has 324 places, 290 transitions, 764 flow. Second operand 27 states and 7209 transitions. [2022-07-13 21:56:46,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 296 transitions, 912 flow [2022-07-13 21:56:46,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-13 21:56:46,080 INFO L242 Difference]: Finished difference. Result has 326 places, 282 transitions, 751 flow [2022-07-13 21:56:46,080 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} [2022-07-13 21:56:46,081 INFO L279 CegarLoopForPetriNet]: 299 programPoint places, 27 predicate places. [2022-07-13 21:56:46,081 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 282 transitions, 751 flow [2022-07-13 21:56:46,082 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) [2022-07-13 21:56:46,082 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:46,082 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] [2022-07-13 21:56:46,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:46,295 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 [2022-07-13 21:56:46,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash 22455350, now seen corresponding path program 1 times [2022-07-13 21:56:46,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:46,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693612975] [2022-07-13 21:56:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:46,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:46,310 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:46,329 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:46,329 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:46,329 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:46,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:46,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-13 21:56:46,330 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:46,330 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:46,330 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-13 21:56:46,348 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:46,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 328 places, 367 transitions, 851 flow [2022-07-13 21:56:46,431 INFO L129 PetriNetUnfolder]: 94/686 cut-off events. [2022-07-13 21:56:46,431 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-13 21:56:46,445 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. [2022-07-13 21:56:46,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 367 transitions, 851 flow [2022-07-13 21:56:46,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 328 places, 367 transitions, 851 flow [2022-07-13 21:56:46,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:46,453 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:46,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:46,467 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-13 21:56:46,467 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:46,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:46,468 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:46,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:46,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:46,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1955489826, now seen corresponding path program 1 times [2022-07-13 21:56:46,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:46,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919534376] [2022-07-13 21:56:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:46,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:46,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:46,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919534376] [2022-07-13 21:56:46,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919534376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:46,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:46,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:46,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764019515] [2022-07-13 21:56:46,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:46,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:46,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:46,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:46,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:46,483 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 367 [2022-07-13 21:56:46,483 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) [2022-07-13 21:56:46,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:46,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 367 [2022-07-13 21:56:46,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:46,582 INFO L129 PetriNetUnfolder]: 0/560 cut-off events. [2022-07-13 21:56:46,583 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-13 21:56:46,583 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. [2022-07-13 21:56:46,584 INFO L132 encePairwiseOnDemand]: 306/367 looper letters, 18 selfloop transitions, 2 changer transitions 11/312 dead transitions. [2022-07-13 21:56:46,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 312 transitions, 781 flow [2022-07-13 21:56:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2022-07-13 21:56:46,585 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8737511353315168 [2022-07-13 21:56:46,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2022-07-13 21:56:46,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2022-07-13 21:56:46,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:46,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2022-07-13 21:56:46,587 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) [2022-07-13 21:56:46,588 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) [2022-07-13 21:56:46,588 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) [2022-07-13 21:56:46,588 INFO L186 Difference]: Start difference. First operand has 328 places, 367 transitions, 851 flow. Second operand 3 states and 962 transitions. [2022-07-13 21:56:46,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 312 transitions, 781 flow [2022-07-13 21:56:46,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 312 transitions, 709 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:46,592 INFO L242 Difference]: Finished difference. Result has 330 places, 298 transitions, 651 flow [2022-07-13 21:56:46,592 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} [2022-07-13 21:56:46,593 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 2 predicate places. [2022-07-13 21:56:46,593 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 298 transitions, 651 flow [2022-07-13 21:56:46,593 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) [2022-07-13 21:56:46,593 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:46,593 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] [2022-07-13 21:56:46,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-13 21:56:46,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:46,594 INFO L85 PathProgramCache]: Analyzing trace with hash -733998826, now seen corresponding path program 1 times [2022-07-13 21:56:46,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:46,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684308240] [2022-07-13 21:56:46,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:46,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:46,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:46,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684308240] [2022-07-13 21:56:46,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684308240] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:46,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406661439] [2022-07-13 21:56:46,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:46,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:46,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:46,616 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) [2022-07-13 21:56:46,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 21:56:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:46,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:46,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:46,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:46,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406661439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:46,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:46,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:46,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114949853] [2022-07-13 21:56:46,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:46,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:46,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:46,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:46,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:46,762 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-07-13 21:56:46,763 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) [2022-07-13 21:56:46,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:46,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-07-13 21:56:46,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:46,872 INFO L129 PetriNetUnfolder]: 0/439 cut-off events. [2022-07-13 21:56:46,872 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-13 21:56:46,872 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. [2022-07-13 21:56:46,873 INFO L132 encePairwiseOnDemand]: 361/367 looper letters, 19 selfloop transitions, 9 changer transitions 0/308 dead transitions. [2022-07-13 21:56:46,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 308 transitions, 729 flow [2022-07-13 21:56:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2649 transitions. [2022-07-13 21:56:46,877 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8019981834695731 [2022-07-13 21:56:46,877 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2649 transitions. [2022-07-13 21:56:46,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2649 transitions. [2022-07-13 21:56:46,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:46,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2649 transitions. [2022-07-13 21:56:46,900 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) [2022-07-13 21:56:46,902 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) [2022-07-13 21:56:46,902 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) [2022-07-13 21:56:46,902 INFO L186 Difference]: Start difference. First operand has 330 places, 298 transitions, 651 flow. Second operand 9 states and 2649 transitions. [2022-07-13 21:56:46,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 308 transitions, 729 flow [2022-07-13 21:56:46,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 308 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:46,906 INFO L242 Difference]: Finished difference. Result has 329 places, 304 transitions, 699 flow [2022-07-13 21:56:46,907 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} [2022-07-13 21:56:46,909 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 1 predicate places. [2022-07-13 21:56:46,909 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 304 transitions, 699 flow [2022-07-13 21:56:46,910 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) [2022-07-13 21:56:46,910 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:46,910 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] [2022-07-13 21:56:46,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:47,126 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 [2022-07-13 21:56:47,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:47,127 INFO L85 PathProgramCache]: Analyzing trace with hash -457798463, now seen corresponding path program 1 times [2022-07-13 21:56:47,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:47,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332686366] [2022-07-13 21:56:47,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:47,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:47,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:47,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332686366] [2022-07-13 21:56:47,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332686366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:47,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974370820] [2022-07-13 21:56:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:47,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:47,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:47,220 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) [2022-07-13 21:56:47,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 21:56:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:47,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:47,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:47,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:47,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974370820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:47,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:47,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:47,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386537010] [2022-07-13 21:56:47,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:47,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:47,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:47,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:47,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:47,488 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-07-13 21:56:47,490 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) [2022-07-13 21:56:47,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:47,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-07-13 21:56:47,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:47,690 INFO L129 PetriNetUnfolder]: 0/395 cut-off events. [2022-07-13 21:56:47,691 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-13 21:56:47,691 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. [2022-07-13 21:56:47,692 INFO L132 encePairwiseOnDemand]: 361/367 looper letters, 27 selfloop transitions, 21 changer transitions 0/328 dead transitions. [2022-07-13 21:56:47,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 328 transitions, 903 flow [2022-07-13 21:56:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6163 transitions. [2022-07-13 21:56:47,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7996626443492929 [2022-07-13 21:56:47,696 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6163 transitions. [2022-07-13 21:56:47,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6163 transitions. [2022-07-13 21:56:47,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:47,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6163 transitions. [2022-07-13 21:56:47,701 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) [2022-07-13 21:56:47,705 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) [2022-07-13 21:56:47,705 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) [2022-07-13 21:56:47,706 INFO L186 Difference]: Start difference. First operand has 329 places, 304 transitions, 699 flow. Second operand 21 states and 6163 transitions. [2022-07-13 21:56:47,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 328 transitions, 903 flow [2022-07-13 21:56:47,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 328 transitions, 889 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:47,710 INFO L242 Difference]: Finished difference. Result has 353 places, 317 transitions, 823 flow [2022-07-13 21:56:47,710 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} [2022-07-13 21:56:47,711 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 25 predicate places. [2022-07-13 21:56:47,711 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 317 transitions, 823 flow [2022-07-13 21:56:47,712 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) [2022-07-13 21:56:47,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:47,712 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] [2022-07-13 21:56:47,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:47,931 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 [2022-07-13 21:56:47,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:47,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:47,931 INFO L85 PathProgramCache]: Analyzing trace with hash 110716963, now seen corresponding path program 1 times [2022-07-13 21:56:47,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:47,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193507709] [2022-07-13 21:56:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:47,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:48,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:48,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193507709] [2022-07-13 21:56:48,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193507709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:48,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606419882] [2022-07-13 21:56:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:48,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:48,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:48,044 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) [2022-07-13 21:56:48,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 21:56:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:48,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:56:48,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:48,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:48,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606419882] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:48,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:48,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:56:48,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265514275] [2022-07-13 21:56:48,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:48,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:56:48,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:48,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:56:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:56:48,496 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-07-13 21:56:48,500 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) [2022-07-13 21:56:48,500 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:48,500 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-07-13 21:56:48,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:48,780 INFO L129 PetriNetUnfolder]: 0/362 cut-off events. [2022-07-13 21:56:48,780 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-13 21:56:48,780 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. [2022-07-13 21:56:48,781 INFO L132 encePairwiseOnDemand]: 362/367 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-07-13 21:56:48,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 328 transitions, 1017 flow [2022-07-13 21:56:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 21:56:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-13 21:56:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8791 transitions. [2022-07-13 21:56:48,787 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.798455949137148 [2022-07-13 21:56:48,787 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8791 transitions. [2022-07-13 21:56:48,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8791 transitions. [2022-07-13 21:56:48,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:48,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8791 transitions. [2022-07-13 21:56:48,795 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) [2022-07-13 21:56:48,802 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) [2022-07-13 21:56:48,803 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) [2022-07-13 21:56:48,803 INFO L186 Difference]: Start difference. First operand has 353 places, 317 transitions, 823 flow. Second operand 30 states and 8791 transitions. [2022-07-13 21:56:48,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 328 transitions, 1017 flow [2022-07-13 21:56:48,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-13 21:56:48,808 INFO L242 Difference]: Finished difference. Result has 358 places, 312 transitions, 834 flow [2022-07-13 21:56:48,808 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} [2022-07-13 21:56:48,809 INFO L279 CegarLoopForPetriNet]: 328 programPoint places, 30 predicate places. [2022-07-13 21:56:48,809 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 312 transitions, 834 flow [2022-07-13 21:56:48,810 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) [2022-07-13 21:56:48,810 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:48,810 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] [2022-07-13 21:56:48,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:49,027 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 [2022-07-13 21:56:49,027 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:49,028 INFO L85 PathProgramCache]: Analyzing trace with hash -209069326, now seen corresponding path program 1 times [2022-07-13 21:56:49,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:49,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899059261] [2022-07-13 21:56:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:49,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:49,042 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:49,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:49,061 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:49,061 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:49,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:49,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-13 21:56:49,062 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:49,062 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:49,062 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-13 21:56:49,081 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:49,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 357 places, 400 transitions, 940 flow [2022-07-13 21:56:49,198 INFO L129 PetriNetUnfolder]: 104/755 cut-off events. [2022-07-13 21:56:49,198 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-13 21:56:49,213 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. [2022-07-13 21:56:49,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 400 transitions, 940 flow [2022-07-13 21:56:49,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 400 transitions, 940 flow [2022-07-13 21:56:49,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:49,221 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:49,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:49,224 INFO L129 PetriNetUnfolder]: 5/82 cut-off events. [2022-07-13 21:56:49,224 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:49,224 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:49,224 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] [2022-07-13 21:56:49,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:49,225 INFO L85 PathProgramCache]: Analyzing trace with hash -312573599, now seen corresponding path program 1 times [2022-07-13 21:56:49,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:49,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061699408] [2022-07-13 21:56:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:49,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:49,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:49,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061699408] [2022-07-13 21:56:49,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061699408] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:49,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:49,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:49,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932005611] [2022-07-13 21:56:49,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:49,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:49,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:49,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:49,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:49,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 400 [2022-07-13 21:56:49,242 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) [2022-07-13 21:56:49,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:49,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 400 [2022-07-13 21:56:49,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:49,336 INFO L129 PetriNetUnfolder]: 0/640 cut-off events. [2022-07-13 21:56:49,336 INFO L130 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-07-13 21:56:49,336 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. [2022-07-13 21:56:49,338 INFO L132 encePairwiseOnDemand]: 336/400 looper letters, 10 selfloop transitions, 0 changer transitions 11/335 dead transitions. [2022-07-13 21:56:49,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 830 flow [2022-07-13 21:56:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 724 transitions. [2022-07-13 21:56:49,339 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.905 [2022-07-13 21:56:49,339 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 724 transitions. [2022-07-13 21:56:49,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 724 transitions. [2022-07-13 21:56:49,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:49,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 724 transitions. [2022-07-13 21:56:49,340 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) [2022-07-13 21:56:49,341 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) [2022-07-13 21:56:49,341 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) [2022-07-13 21:56:49,341 INFO L186 Difference]: Start difference. First operand has 357 places, 400 transitions, 940 flow. Second operand 2 states and 724 transitions. [2022-07-13 21:56:49,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 830 flow [2022-07-13 21:56:49,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 335 transitions, 740 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:49,345 INFO L242 Difference]: Finished difference. Result has 357 places, 324 transitions, 698 flow [2022-07-13 21:56:49,346 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} [2022-07-13 21:56:49,346 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 0 predicate places. [2022-07-13 21:56:49,346 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 324 transitions, 698 flow [2022-07-13 21:56:49,346 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) [2022-07-13 21:56:49,346 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:49,347 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:49,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-13 21:56:49,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2109524958, now seen corresponding path program 1 times [2022-07-13 21:56:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:49,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335074634] [2022-07-13 21:56:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:49,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:49,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335074634] [2022-07-13 21:56:49,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335074634] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:49,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:49,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:49,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672870601] [2022-07-13 21:56:49,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:49,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:49,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:49,361 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 400 [2022-07-13 21:56:49,361 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) [2022-07-13 21:56:49,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:49,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 400 [2022-07-13 21:56:49,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:49,469 INFO L129 PetriNetUnfolder]: 0/508 cut-off events. [2022-07-13 21:56:49,469 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-13 21:56:49,469 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. [2022-07-13 21:56:49,470 INFO L132 encePairwiseOnDemand]: 397/400 looper letters, 19 selfloop transitions, 2 changer transitions 0/328 dead transitions. [2022-07-13 21:56:49,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 328 transitions, 748 flow [2022-07-13 21:56:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2022-07-13 21:56:49,472 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8133333333333334 [2022-07-13 21:56:49,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2022-07-13 21:56:49,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2022-07-13 21:56:49,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:49,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2022-07-13 21:56:49,473 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) [2022-07-13 21:56:49,474 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) [2022-07-13 21:56:49,474 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) [2022-07-13 21:56:49,474 INFO L186 Difference]: Start difference. First operand has 357 places, 324 transitions, 698 flow. Second operand 3 states and 976 transitions. [2022-07-13 21:56:49,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 328 transitions, 748 flow [2022-07-13 21:56:49,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 328 transitions, 748 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:49,478 INFO L242 Difference]: Finished difference. Result has 349 places, 325 transitions, 710 flow [2022-07-13 21:56:49,479 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} [2022-07-13 21:56:49,479 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, -8 predicate places. [2022-07-13 21:56:49,479 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 325 transitions, 710 flow [2022-07-13 21:56:49,479 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) [2022-07-13 21:56:49,479 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:49,479 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] [2022-07-13 21:56:49,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-13 21:56:49,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:49,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:49,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1154115786, now seen corresponding path program 1 times [2022-07-13 21:56:49,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:49,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041492339] [2022-07-13 21:56:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:49,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:49,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:49,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041492339] [2022-07-13 21:56:49,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041492339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:49,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514098303] [2022-07-13 21:56:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:49,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:49,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:49,502 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) [2022-07-13 21:56:49,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 21:56:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:49,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:49,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:49,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:49,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514098303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:49,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:49,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:49,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715852642] [2022-07-13 21:56:49,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:49,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:49,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:49,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:49,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:49,712 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-07-13 21:56:49,713 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) [2022-07-13 21:56:49,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:49,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-07-13 21:56:49,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:49,848 INFO L129 PetriNetUnfolder]: 0/486 cut-off events. [2022-07-13 21:56:49,848 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-13 21:56:49,848 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. [2022-07-13 21:56:49,849 INFO L132 encePairwiseOnDemand]: 394/400 looper letters, 20 selfloop transitions, 9 changer transitions 0/335 dead transitions. [2022-07-13 21:56:49,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 790 flow [2022-07-13 21:56:49,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:49,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2884 transitions. [2022-07-13 21:56:49,852 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8011111111111111 [2022-07-13 21:56:49,852 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2884 transitions. [2022-07-13 21:56:49,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2884 transitions. [2022-07-13 21:56:49,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:49,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2884 transitions. [2022-07-13 21:56:49,854 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) [2022-07-13 21:56:49,856 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) [2022-07-13 21:56:49,856 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) [2022-07-13 21:56:49,857 INFO L186 Difference]: Start difference. First operand has 349 places, 325 transitions, 710 flow. Second operand 9 states and 2884 transitions. [2022-07-13 21:56:49,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 790 flow [2022-07-13 21:56:49,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 335 transitions, 788 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:49,861 INFO L242 Difference]: Finished difference. Result has 359 places, 331 transitions, 758 flow [2022-07-13 21:56:49,861 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} [2022-07-13 21:56:49,862 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 2 predicate places. [2022-07-13 21:56:49,862 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 331 transitions, 758 flow [2022-07-13 21:56:49,862 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) [2022-07-13 21:56:49,862 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:49,862 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] [2022-07-13 21:56:49,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-13 21:56:50,080 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 [2022-07-13 21:56:50,080 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1243680545, now seen corresponding path program 1 times [2022-07-13 21:56:50,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:50,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738904379] [2022-07-13 21:56:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:50,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:50,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:50,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738904379] [2022-07-13 21:56:50,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738904379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:50,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453100280] [2022-07-13 21:56:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:50,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:50,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:50,122 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) [2022-07-13 21:56:50,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 21:56:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:50,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:50,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:50,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:50,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453100280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:50,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:50,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652652980] [2022-07-13 21:56:50,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:50,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:50,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:50,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:50,381 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-07-13 21:56:50,383 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) [2022-07-13 21:56:50,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:50,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-07-13 21:56:50,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:50,609 INFO L129 PetriNetUnfolder]: 0/442 cut-off events. [2022-07-13 21:56:50,610 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-13 21:56:50,610 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. [2022-07-13 21:56:50,615 INFO L132 encePairwiseOnDemand]: 394/400 looper letters, 28 selfloop transitions, 21 changer transitions 0/355 dead transitions. [2022-07-13 21:56:50,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 355 transitions, 964 flow [2022-07-13 21:56:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6710 transitions. [2022-07-13 21:56:50,619 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7988095238095239 [2022-07-13 21:56:50,619 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6710 transitions. [2022-07-13 21:56:50,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6710 transitions. [2022-07-13 21:56:50,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:50,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6710 transitions. [2022-07-13 21:56:50,624 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) [2022-07-13 21:56:50,629 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) [2022-07-13 21:56:50,629 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) [2022-07-13 21:56:50,629 INFO L186 Difference]: Start difference. First operand has 359 places, 331 transitions, 758 flow. Second operand 21 states and 6710 transitions. [2022-07-13 21:56:50,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 355 transitions, 964 flow [2022-07-13 21:56:50,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 355 transitions, 950 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:50,636 INFO L242 Difference]: Finished difference. Result has 383 places, 344 transitions, 882 flow [2022-07-13 21:56:50,636 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} [2022-07-13 21:56:50,637 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 26 predicate places. [2022-07-13 21:56:50,637 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 344 transitions, 882 flow [2022-07-13 21:56:50,637 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) [2022-07-13 21:56:50,637 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:50,638 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] [2022-07-13 21:56:50,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:50,865 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 [2022-07-13 21:56:50,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:50,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:50,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1389100285, now seen corresponding path program 1 times [2022-07-13 21:56:50,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:50,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888675618] [2022-07-13 21:56:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:50,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:51,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:51,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888675618] [2022-07-13 21:56:51,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888675618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:51,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18483921] [2022-07-13 21:56:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:51,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:51,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:51,008 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) [2022-07-13 21:56:51,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 21:56:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:51,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:56:51,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:51,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:51,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18483921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:51,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:51,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:56:51,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052859062] [2022-07-13 21:56:51,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:51,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:56:51,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:51,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:56:51,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:56:51,459 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-07-13 21:56:51,463 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) [2022-07-13 21:56:51,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:51,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-07-13 21:56:51,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:51,838 INFO L129 PetriNetUnfolder]: 0/398 cut-off events. [2022-07-13 21:56:51,839 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-13 21:56:51,839 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. [2022-07-13 21:56:51,840 INFO L132 encePairwiseOnDemand]: 395/400 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-07-13 21:56:51,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-07-13 21:56:51,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 21:56:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-13 21:56:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10529 transitions. [2022-07-13 21:56:51,862 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7976515151515151 [2022-07-13 21:56:51,862 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10529 transitions. [2022-07-13 21:56:51,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10529 transitions. [2022-07-13 21:56:51,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:51,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10529 transitions. [2022-07-13 21:56:51,871 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) [2022-07-13 21:56:51,878 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) [2022-07-13 21:56:51,879 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) [2022-07-13 21:56:51,879 INFO L186 Difference]: Start difference. First operand has 383 places, 344 transitions, 882 flow. Second operand 33 states and 10529 transitions. [2022-07-13 21:56:51,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-07-13 21:56:51,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-13 21:56:51,885 INFO L242 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-07-13 21:56:51,885 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} [2022-07-13 21:56:51,885 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 34 predicate places. [2022-07-13 21:56:51,886 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-07-13 21:56:51,887 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) [2022-07-13 21:56:51,887 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:51,887 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] [2022-07-13 21:56:51,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-13 21:56:52,103 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 [2022-07-13 21:56:52,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2124296463, now seen corresponding path program 1 times [2022-07-13 21:56:52,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:52,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709039036] [2022-07-13 21:56:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:52,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:52,146 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:52,173 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:52,173 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:52,173 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:52,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:52,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-13 21:56:52,174 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:56:52,174 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:52,174 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-13 21:56:52,194 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:52,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 386 places, 433 transitions, 1031 flow [2022-07-13 21:56:52,304 INFO L129 PetriNetUnfolder]: 114/824 cut-off events. [2022-07-13 21:56:52,305 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-07-13 21:56:52,363 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. [2022-07-13 21:56:52,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 433 transitions, 1031 flow [2022-07-13 21:56:52,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 433 transitions, 1031 flow [2022-07-13 21:56:52,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:52,374 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:52,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:52,377 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-13 21:56:52,378 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:52,378 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:52,378 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] [2022-07-13 21:56:52,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash 544580322, now seen corresponding path program 1 times [2022-07-13 21:56:52,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:52,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642347370] [2022-07-13 21:56:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:52,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:52,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642347370] [2022-07-13 21:56:52,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642347370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:52,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:52,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:52,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853977405] [2022-07-13 21:56:52,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:52,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:52,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:52,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:52,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:52,396 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 433 [2022-07-13 21:56:52,397 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) [2022-07-13 21:56:52,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:52,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 433 [2022-07-13 21:56:52,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:52,551 INFO L129 PetriNetUnfolder]: 0/676 cut-off events. [2022-07-13 21:56:52,552 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-07-13 21:56:52,552 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. [2022-07-13 21:56:52,553 INFO L132 encePairwiseOnDemand]: 360/433 looper letters, 20 selfloop transitions, 2 changer transitions 11/366 dead transitions. [2022-07-13 21:56:52,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 366 transitions, 941 flow [2022-07-13 21:56:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1132 transitions. [2022-07-13 21:56:52,554 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8714395688991532 [2022-07-13 21:56:52,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1132 transitions. [2022-07-13 21:56:52,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1132 transitions. [2022-07-13 21:56:52,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:52,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1132 transitions. [2022-07-13 21:56:52,556 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) [2022-07-13 21:56:52,557 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) [2022-07-13 21:56:52,557 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) [2022-07-13 21:56:52,557 INFO L186 Difference]: Start difference. First operand has 386 places, 433 transitions, 1031 flow. Second operand 3 states and 1132 transitions. [2022-07-13 21:56:52,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 366 transitions, 941 flow [2022-07-13 21:56:52,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 366 transitions, 831 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:52,562 INFO L242 Difference]: Finished difference. Result has 388 places, 352 transitions, 769 flow [2022-07-13 21:56:52,562 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} [2022-07-13 21:56:52,563 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 2 predicate places. [2022-07-13 21:56:52,563 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 352 transitions, 769 flow [2022-07-13 21:56:52,563 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) [2022-07-13 21:56:52,563 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:52,563 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] [2022-07-13 21:56:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-13 21:56:52,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash -382004042, now seen corresponding path program 1 times [2022-07-13 21:56:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:52,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299638359] [2022-07-13 21:56:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:52,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299638359] [2022-07-13 21:56:52,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299638359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150707306] [2022-07-13 21:56:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:52,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:52,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:52,600 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) [2022-07-13 21:56:52,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 21:56:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:52,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:52,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:52,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:52,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150707306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:52,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:52,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:52,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492025719] [2022-07-13 21:56:52,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:52,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:52,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:52,795 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-07-13 21:56:52,796 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) [2022-07-13 21:56:52,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:52,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-07-13 21:56:52,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:52,946 INFO L129 PetriNetUnfolder]: 0/533 cut-off events. [2022-07-13 21:56:52,946 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-13 21:56:52,947 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. [2022-07-13 21:56:52,948 INFO L132 encePairwiseOnDemand]: 427/433 looper letters, 21 selfloop transitions, 9 changer transitions 0/362 dead transitions. [2022-07-13 21:56:52,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 362 transitions, 851 flow [2022-07-13 21:56:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3119 transitions. [2022-07-13 21:56:52,950 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.800359250705671 [2022-07-13 21:56:52,950 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3119 transitions. [2022-07-13 21:56:52,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3119 transitions. [2022-07-13 21:56:52,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:52,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3119 transitions. [2022-07-13 21:56:52,952 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) [2022-07-13 21:56:52,954 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) [2022-07-13 21:56:52,955 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) [2022-07-13 21:56:52,955 INFO L186 Difference]: Start difference. First operand has 388 places, 352 transitions, 769 flow. Second operand 9 states and 3119 transitions. [2022-07-13 21:56:52,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 362 transitions, 851 flow [2022-07-13 21:56:52,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 362 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:52,976 INFO L242 Difference]: Finished difference. Result has 387 places, 358 transitions, 817 flow [2022-07-13 21:56:52,977 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} [2022-07-13 21:56:52,977 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 1 predicate places. [2022-07-13 21:56:52,977 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 358 transitions, 817 flow [2022-07-13 21:56:52,978 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) [2022-07-13 21:56:52,978 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:52,978 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:52,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:53,195 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 [2022-07-13 21:56:53,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:53,196 INFO L85 PathProgramCache]: Analyzing trace with hash 33446433, now seen corresponding path program 1 times [2022-07-13 21:56:53,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:53,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391793519] [2022-07-13 21:56:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:53,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:53,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391793519] [2022-07-13 21:56:53,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391793519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:53,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479765158] [2022-07-13 21:56:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:53,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:53,268 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) [2022-07-13 21:56:53,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 21:56:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:53,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:53,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:53,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479765158] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:53,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:53,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656205273] [2022-07-13 21:56:53,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:53,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:53,523 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-07-13 21:56:53,525 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) [2022-07-13 21:56:53,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:53,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-07-13 21:56:53,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:53,738 INFO L129 PetriNetUnfolder]: 0/489 cut-off events. [2022-07-13 21:56:53,739 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-07-13 21:56:53,739 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. [2022-07-13 21:56:53,740 INFO L132 encePairwiseOnDemand]: 427/433 looper letters, 29 selfloop transitions, 21 changer transitions 0/382 dead transitions. [2022-07-13 21:56:53,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 382 transitions, 1025 flow [2022-07-13 21:56:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7257 transitions. [2022-07-13 21:56:53,744 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7980864401187727 [2022-07-13 21:56:53,744 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7257 transitions. [2022-07-13 21:56:53,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7257 transitions. [2022-07-13 21:56:53,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:53,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7257 transitions. [2022-07-13 21:56:53,749 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) [2022-07-13 21:56:53,753 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) [2022-07-13 21:56:53,754 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) [2022-07-13 21:56:53,754 INFO L186 Difference]: Start difference. First operand has 387 places, 358 transitions, 817 flow. Second operand 21 states and 7257 transitions. [2022-07-13 21:56:53,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 382 transitions, 1025 flow [2022-07-13 21:56:53,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 382 transitions, 1011 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:53,760 INFO L242 Difference]: Finished difference. Result has 411 places, 371 transitions, 941 flow [2022-07-13 21:56:53,760 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} [2022-07-13 21:56:53,761 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 25 predicate places. [2022-07-13 21:56:53,761 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 371 transitions, 941 flow [2022-07-13 21:56:53,761 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) [2022-07-13 21:56:53,762 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:53,762 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] [2022-07-13 21:56:53,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:53,976 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 [2022-07-13 21:56:53,977 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:53,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1613256445, now seen corresponding path program 1 times [2022-07-13 21:56:53,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:53,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242208562] [2022-07-13 21:56:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:53,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:54,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:54,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242208562] [2022-07-13 21:56:54,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242208562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:54,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686368740] [2022-07-13 21:56:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:54,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:54,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:54,104 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) [2022-07-13 21:56:54,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 21:56:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:54,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:56:54,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:54,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:54,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686368740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:54,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:54,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:56:54,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112443426] [2022-07-13 21:56:54,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:54,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:56:54,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:56:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:56:54,566 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-07-13 21:56:54,579 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) [2022-07-13 21:56:54,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:54,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-07-13 21:56:54,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:54,948 INFO L129 PetriNetUnfolder]: 0/434 cut-off events. [2022-07-13 21:56:54,949 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-13 21:56:54,949 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. [2022-07-13 21:56:54,949 INFO L132 encePairwiseOnDemand]: 428/433 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-07-13 21:56:54,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 392 transitions, 1227 flow [2022-07-13 21:56:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 21:56:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-13 21:56:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12423 transitions. [2022-07-13 21:56:54,955 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969591993841416 [2022-07-13 21:56:54,955 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12423 transitions. [2022-07-13 21:56:54,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12423 transitions. [2022-07-13 21:56:54,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:54,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12423 transitions. [2022-07-13 21:56:54,964 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) [2022-07-13 21:56:54,971 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) [2022-07-13 21:56:54,972 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) [2022-07-13 21:56:54,972 INFO L186 Difference]: Start difference. First operand has 411 places, 371 transitions, 941 flow. Second operand 36 states and 12423 transitions. [2022-07-13 21:56:54,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 392 transitions, 1227 flow [2022-07-13 21:56:54,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-07-13 21:56:54,978 INFO L242 Difference]: Finished difference. Result has 422 places, 372 transitions, 1000 flow [2022-07-13 21:56:54,979 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} [2022-07-13 21:56:54,979 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, 36 predicate places. [2022-07-13 21:56:54,979 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 372 transitions, 1000 flow [2022-07-13 21:56:54,980 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) [2022-07-13 21:56:54,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:54,981 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] [2022-07-13 21:56:55,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:55,195 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 [2022-07-13 21:56:55,195 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:55,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:55,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1736277805, now seen corresponding path program 1 times [2022-07-13 21:56:55,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:55,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023459931] [2022-07-13 21:56:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:55,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:55,212 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:55,229 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:55,229 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:55,230 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:55,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:55,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-13 21:56:55,230 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:56:55,232 WARN L231 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:55,232 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-07-13 21:56:55,254 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:55,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 415 places, 466 transitions, 1124 flow [2022-07-13 21:56:55,387 INFO L129 PetriNetUnfolder]: 124/893 cut-off events. [2022-07-13 21:56:55,387 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-13 21:56:55,409 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. [2022-07-13 21:56:55,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 415 places, 466 transitions, 1124 flow [2022-07-13 21:56:55,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 415 places, 466 transitions, 1124 flow [2022-07-13 21:56:55,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:55,419 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:55,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:55,433 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2022-07-13 21:56:55,433 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:55,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:55,433 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] [2022-07-13 21:56:55,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:55,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:55,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1170144863, now seen corresponding path program 1 times [2022-07-13 21:56:55,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:55,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492221522] [2022-07-13 21:56:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:55,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:55,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:55,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492221522] [2022-07-13 21:56:55,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492221522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:55,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:55,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:55,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825478732] [2022-07-13 21:56:55,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:55,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:55,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:55,445 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 466 [2022-07-13 21:56:55,445 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) [2022-07-13 21:56:55,445 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:55,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 466 [2022-07-13 21:56:55,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:55,569 INFO L129 PetriNetUnfolder]: 0/756 cut-off events. [2022-07-13 21:56:55,570 INFO L130 PetriNetUnfolder]: For 430/430 co-relation queries the response was YES. [2022-07-13 21:56:55,570 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. [2022-07-13 21:56:55,571 INFO L132 encePairwiseOnDemand]: 390/466 looper letters, 12 selfloop transitions, 0 changer transitions 11/389 dead transitions. [2022-07-13 21:56:55,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 389 transitions, 994 flow [2022-07-13 21:56:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 842 transitions. [2022-07-13 21:56:55,572 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9034334763948498 [2022-07-13 21:56:55,572 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 842 transitions. [2022-07-13 21:56:55,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 842 transitions. [2022-07-13 21:56:55,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:55,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 842 transitions. [2022-07-13 21:56:55,573 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) [2022-07-13 21:56:55,574 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) [2022-07-13 21:56:55,574 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) [2022-07-13 21:56:55,574 INFO L186 Difference]: Start difference. First operand has 415 places, 466 transitions, 1124 flow. Second operand 2 states and 842 transitions. [2022-07-13 21:56:55,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 389 transitions, 994 flow [2022-07-13 21:56:55,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 389 transitions, 862 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:55,579 INFO L242 Difference]: Finished difference. Result has 415 places, 378 transitions, 816 flow [2022-07-13 21:56:55,580 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} [2022-07-13 21:56:55,580 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 0 predicate places. [2022-07-13 21:56:55,580 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 378 transitions, 816 flow [2022-07-13 21:56:55,580 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) [2022-07-13 21:56:55,580 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:55,581 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] [2022-07-13 21:56:55,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-13 21:56:55,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:55,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1327871074, now seen corresponding path program 1 times [2022-07-13 21:56:55,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:55,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552081522] [2022-07-13 21:56:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:55,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:55,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552081522] [2022-07-13 21:56:55,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552081522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:55,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:55,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:55,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922479783] [2022-07-13 21:56:55,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:55,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:55,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:55,598 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 466 [2022-07-13 21:56:55,599 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) [2022-07-13 21:56:55,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:55,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 466 [2022-07-13 21:56:55,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:55,716 INFO L129 PetriNetUnfolder]: 0/602 cut-off events. [2022-07-13 21:56:55,716 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-13 21:56:55,716 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. [2022-07-13 21:56:55,717 INFO L132 encePairwiseOnDemand]: 463/466 looper letters, 21 selfloop transitions, 2 changer transitions 0/382 dead transitions. [2022-07-13 21:56:55,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 382 transitions, 870 flow [2022-07-13 21:56:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1134 transitions. [2022-07-13 21:56:55,719 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8111587982832618 [2022-07-13 21:56:55,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1134 transitions. [2022-07-13 21:56:55,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1134 transitions. [2022-07-13 21:56:55,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:55,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1134 transitions. [2022-07-13 21:56:55,720 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) [2022-07-13 21:56:55,721 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) [2022-07-13 21:56:55,721 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) [2022-07-13 21:56:55,721 INFO L186 Difference]: Start difference. First operand has 415 places, 378 transitions, 816 flow. Second operand 3 states and 1134 transitions. [2022-07-13 21:56:55,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 382 transitions, 870 flow [2022-07-13 21:56:55,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 382 transitions, 870 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:55,726 INFO L242 Difference]: Finished difference. Result has 407 places, 379 transitions, 828 flow [2022-07-13 21:56:55,726 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} [2022-07-13 21:56:55,726 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, -8 predicate places. [2022-07-13 21:56:55,726 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 379 transitions, 828 flow [2022-07-13 21:56:55,727 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) [2022-07-13 21:56:55,727 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:55,727 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] [2022-07-13 21:56:55,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-13 21:56:55,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1582336406, now seen corresponding path program 1 times [2022-07-13 21:56:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:55,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829237795] [2022-07-13 21:56:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:55,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:55,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829237795] [2022-07-13 21:56:55,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829237795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:55,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312256654] [2022-07-13 21:56:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:55,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:55,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:55,750 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) [2022-07-13 21:56:55,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 21:56:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:55,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:55,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:55,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312256654] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:55,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:55,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:55,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978765840] [2022-07-13 21:56:55,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:55,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:55,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:55,988 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-07-13 21:56:55,989 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) [2022-07-13 21:56:55,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:55,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-07-13 21:56:55,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:56,187 INFO L129 PetriNetUnfolder]: 0/580 cut-off events. [2022-07-13 21:56:56,187 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-13 21:56:56,187 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. [2022-07-13 21:56:56,188 INFO L132 encePairwiseOnDemand]: 460/466 looper letters, 22 selfloop transitions, 9 changer transitions 0/389 dead transitions. [2022-07-13 21:56:56,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 389 transitions, 912 flow [2022-07-13 21:56:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3354 transitions. [2022-07-13 21:56:56,191 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7997138769670958 [2022-07-13 21:56:56,192 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3354 transitions. [2022-07-13 21:56:56,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3354 transitions. [2022-07-13 21:56:56,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:56,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3354 transitions. [2022-07-13 21:56:56,197 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) [2022-07-13 21:56:56,200 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) [2022-07-13 21:56:56,200 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) [2022-07-13 21:56:56,200 INFO L186 Difference]: Start difference. First operand has 407 places, 379 transitions, 828 flow. Second operand 9 states and 3354 transitions. [2022-07-13 21:56:56,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 389 transitions, 912 flow [2022-07-13 21:56:56,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 389 transitions, 910 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:56,206 INFO L242 Difference]: Finished difference. Result has 417 places, 385 transitions, 876 flow [2022-07-13 21:56:56,206 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} [2022-07-13 21:56:56,207 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 2 predicate places. [2022-07-13 21:56:56,207 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 385 transitions, 876 flow [2022-07-13 21:56:56,208 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) [2022-07-13 21:56:56,208 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:56,208 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] [2022-07-13 21:56:56,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:56,425 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 [2022-07-13 21:56:56,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:56,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash 206466497, now seen corresponding path program 1 times [2022-07-13 21:56:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:56,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494773431] [2022-07-13 21:56:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:56,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:56,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:56,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494773431] [2022-07-13 21:56:56,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494773431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622507983] [2022-07-13 21:56:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:56,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:56,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:56,484 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) [2022-07-13 21:56:56,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 21:56:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:56,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:56:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:56,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:56,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622507983] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:56,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:56,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:56:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021057819] [2022-07-13 21:56:56,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:56,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:56:56,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:56,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:56:56,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:56:56,757 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-07-13 21:56:56,774 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) [2022-07-13 21:56:56,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:56,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-07-13 21:56:56,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:57,050 INFO L129 PetriNetUnfolder]: 0/536 cut-off events. [2022-07-13 21:56:57,051 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-07-13 21:56:57,051 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. [2022-07-13 21:56:57,052 INFO L132 encePairwiseOnDemand]: 460/466 looper letters, 30 selfloop transitions, 21 changer transitions 0/409 dead transitions. [2022-07-13 21:56:57,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 409 transitions, 1086 flow [2022-07-13 21:56:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:56:57,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:56:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7804 transitions. [2022-07-13 21:56:57,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7974657674228489 [2022-07-13 21:56:57,068 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7804 transitions. [2022-07-13 21:56:57,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7804 transitions. [2022-07-13 21:56:57,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:57,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7804 transitions. [2022-07-13 21:56:57,075 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) [2022-07-13 21:56:57,080 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) [2022-07-13 21:56:57,080 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) [2022-07-13 21:56:57,080 INFO L186 Difference]: Start difference. First operand has 417 places, 385 transitions, 876 flow. Second operand 21 states and 7804 transitions. [2022-07-13 21:56:57,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 409 transitions, 1086 flow [2022-07-13 21:56:57,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 409 transitions, 1072 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:57,090 INFO L242 Difference]: Finished difference. Result has 441 places, 398 transitions, 1000 flow [2022-07-13 21:56:57,103 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} [2022-07-13 21:56:57,104 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 26 predicate places. [2022-07-13 21:56:57,104 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 398 transitions, 1000 flow [2022-07-13 21:56:57,105 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) [2022-07-13 21:56:57,105 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:57,105 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] [2022-07-13 21:56:57,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:57,319 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 [2022-07-13 21:56:57,319 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash -561751517, now seen corresponding path program 1 times [2022-07-13 21:56:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:57,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687589315] [2022-07-13 21:56:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:57,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:57,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:57,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687589315] [2022-07-13 21:56:57,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687589315] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:57,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365787450] [2022-07-13 21:56:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:57,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:57,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:57,503 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) [2022-07-13 21:56:57,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 21:56:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:57,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:56:57,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:57,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:57,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365787450] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:57,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:57,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:56:57,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452200822] [2022-07-13 21:56:57,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:56:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:56:57,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:56:57,977 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-07-13 21:56:57,981 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) [2022-07-13 21:56:57,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:57,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-07-13 21:56:57,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:58,395 INFO L129 PetriNetUnfolder]: 0/470 cut-off events. [2022-07-13 21:56:58,396 INFO L130 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-07-13 21:56:58,396 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. [2022-07-13 21:56:58,412 INFO L132 encePairwiseOnDemand]: 461/466 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-07-13 21:56:58,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 424 transitions, 1332 flow [2022-07-13 21:56:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 21:56:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-13 21:56:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14473 transitions. [2022-07-13 21:56:58,426 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7963574336964895 [2022-07-13 21:56:58,427 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14473 transitions. [2022-07-13 21:56:58,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14473 transitions. [2022-07-13 21:56:58,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:58,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14473 transitions. [2022-07-13 21:56:58,452 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) [2022-07-13 21:56:58,461 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) [2022-07-13 21:56:58,462 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) [2022-07-13 21:56:58,471 INFO L186 Difference]: Start difference. First operand has 441 places, 398 transitions, 1000 flow. Second operand 39 states and 14473 transitions. [2022-07-13 21:56:58,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 424 transitions, 1332 flow [2022-07-13 21:56:58,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-07-13 21:56:58,479 INFO L242 Difference]: Finished difference. Result has 455 places, 402 transitions, 1083 flow [2022-07-13 21:56:58,480 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} [2022-07-13 21:56:58,480 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, 40 predicate places. [2022-07-13 21:56:58,480 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 402 transitions, 1083 flow [2022-07-13 21:56:58,482 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) [2022-07-13 21:56:58,485 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:58,486 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] [2022-07-13 21:56:58,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:58,702 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 [2022-07-13 21:56:58,703 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash -981893652, now seen corresponding path program 1 times [2022-07-13 21:56:58,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:58,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691928566] [2022-07-13 21:56:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:58,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:58,722 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:58,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:58,754 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:58,754 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:58,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:58,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-13 21:56:58,755 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:56:58,755 WARN L231 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:58,755 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-07-13 21:56:58,778 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:56:58,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 444 places, 499 transitions, 1219 flow [2022-07-13 21:56:58,954 INFO L129 PetriNetUnfolder]: 134/962 cut-off events. [2022-07-13 21:56:58,954 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-13 21:56:58,974 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. [2022-07-13 21:56:58,974 INFO L82 GeneralOperation]: Start removeDead. Operand has 444 places, 499 transitions, 1219 flow [2022-07-13 21:56:58,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 499 transitions, 1219 flow [2022-07-13 21:56:58,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:58,985 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:56:58,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:58,987 INFO L129 PetriNetUnfolder]: 2/73 cut-off events. [2022-07-13 21:56:58,987 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:58,987 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:58,988 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] [2022-07-13 21:56:58,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash 240347298, now seen corresponding path program 1 times [2022-07-13 21:56:58,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:58,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098264671] [2022-07-13 21:56:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:58,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:59,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:59,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098264671] [2022-07-13 21:56:59,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098264671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:59,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:59,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:59,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598639607] [2022-07-13 21:56:59,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:59,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:59,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:59,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:59,002 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 499 [2022-07-13 21:56:59,002 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) [2022-07-13 21:56:59,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:59,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 499 [2022-07-13 21:56:59,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:59,190 INFO L129 PetriNetUnfolder]: 0/792 cut-off events. [2022-07-13 21:56:59,191 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-13 21:56:59,191 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. [2022-07-13 21:56:59,192 INFO L132 encePairwiseOnDemand]: 414/499 looper letters, 22 selfloop transitions, 2 changer transitions 11/420 dead transitions. [2022-07-13 21:56:59,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 420 transitions, 1109 flow [2022-07-13 21:56:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1302 transitions. [2022-07-13 21:56:59,193 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8697394789579158 [2022-07-13 21:56:59,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1302 transitions. [2022-07-13 21:56:59,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1302 transitions. [2022-07-13 21:56:59,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:59,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1302 transitions. [2022-07-13 21:56:59,195 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) [2022-07-13 21:56:59,196 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) [2022-07-13 21:56:59,196 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) [2022-07-13 21:56:59,196 INFO L186 Difference]: Start difference. First operand has 444 places, 499 transitions, 1219 flow. Second operand 3 states and 1302 transitions. [2022-07-13 21:56:59,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 420 transitions, 1109 flow [2022-07-13 21:56:59,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 420 transitions, 953 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:59,202 INFO L242 Difference]: Finished difference. Result has 446 places, 406 transitions, 887 flow [2022-07-13 21:56:59,203 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} [2022-07-13 21:56:59,204 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 2 predicate places. [2022-07-13 21:56:59,204 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 406 transitions, 887 flow [2022-07-13 21:56:59,204 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) [2022-07-13 21:56:59,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:59,204 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] [2022-07-13 21:56:59,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-13 21:56:59,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:59,205 INFO L85 PathProgramCache]: Analyzing trace with hash 443938262, now seen corresponding path program 1 times [2022-07-13 21:56:59,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:59,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046958170] [2022-07-13 21:56:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:59,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:59,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:59,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046958170] [2022-07-13 21:56:59,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046958170] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:59,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856496640] [2022-07-13 21:56:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:59,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:59,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:59,238 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) [2022-07-13 21:56:59,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 21:56:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:59,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:59,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:59,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:59,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856496640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:59,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:59,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:59,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762207979] [2022-07-13 21:56:59,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:59,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:59,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:59,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:59,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:59,442 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-07-13 21:56:59,443 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) [2022-07-13 21:56:59,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:59,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-07-13 21:56:59,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:59,629 INFO L129 PetriNetUnfolder]: 0/627 cut-off events. [2022-07-13 21:56:59,630 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-13 21:56:59,630 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. [2022-07-13 21:56:59,631 INFO L132 encePairwiseOnDemand]: 493/499 looper letters, 23 selfloop transitions, 9 changer transitions 0/416 dead transitions. [2022-07-13 21:56:59,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 416 transitions, 973 flow [2022-07-13 21:56:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3589 transitions. [2022-07-13 21:56:59,633 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7991538632821198 [2022-07-13 21:56:59,633 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3589 transitions. [2022-07-13 21:56:59,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3589 transitions. [2022-07-13 21:56:59,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:59,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3589 transitions. [2022-07-13 21:56:59,636 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) [2022-07-13 21:56:59,637 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) [2022-07-13 21:56:59,638 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) [2022-07-13 21:56:59,638 INFO L186 Difference]: Start difference. First operand has 446 places, 406 transitions, 887 flow. Second operand 9 states and 3589 transitions. [2022-07-13 21:56:59,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 416 transitions, 973 flow [2022-07-13 21:56:59,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 416 transitions, 971 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:59,643 INFO L242 Difference]: Finished difference. Result has 445 places, 412 transitions, 935 flow [2022-07-13 21:56:59,644 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} [2022-07-13 21:56:59,644 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 1 predicate places. [2022-07-13 21:56:59,644 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 412 transitions, 935 flow [2022-07-13 21:56:59,645 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) [2022-07-13 21:56:59,645 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:59,645 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] [2022-07-13 21:56:59,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:59,862 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 [2022-07-13 21:56:59,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:59,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1762740737, now seen corresponding path program 1 times [2022-07-13 21:56:59,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:59,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736384746] [2022-07-13 21:56:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:59,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:59,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:59,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736384746] [2022-07-13 21:56:59,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736384746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:59,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752339279] [2022-07-13 21:56:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:59,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:59,913 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) [2022-07-13 21:56:59,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-13 21:57:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:00,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:00,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752339279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:00,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:00,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:00,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676909692] [2022-07-13 21:57:00,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:00,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:00,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:00,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:00,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:00,197 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-07-13 21:57:00,199 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) [2022-07-13 21:57:00,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:00,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-07-13 21:57:00,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:00,441 INFO L129 PetriNetUnfolder]: 0/583 cut-off events. [2022-07-13 21:57:00,441 INFO L130 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-07-13 21:57:00,442 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. [2022-07-13 21:57:00,443 INFO L132 encePairwiseOnDemand]: 493/499 looper letters, 31 selfloop transitions, 21 changer transitions 0/436 dead transitions. [2022-07-13 21:57:00,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 436 transitions, 1147 flow [2022-07-13 21:57:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8351 transitions. [2022-07-13 21:57:00,447 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969271877087508 [2022-07-13 21:57:00,447 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8351 transitions. [2022-07-13 21:57:00,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8351 transitions. [2022-07-13 21:57:00,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:00,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8351 transitions. [2022-07-13 21:57:00,453 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) [2022-07-13 21:57:00,457 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) [2022-07-13 21:57:00,458 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) [2022-07-13 21:57:00,458 INFO L186 Difference]: Start difference. First operand has 445 places, 412 transitions, 935 flow. Second operand 21 states and 8351 transitions. [2022-07-13 21:57:00,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 436 transitions, 1147 flow [2022-07-13 21:57:00,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 436 transitions, 1133 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:00,464 INFO L242 Difference]: Finished difference. Result has 469 places, 425 transitions, 1059 flow [2022-07-13 21:57:00,465 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} [2022-07-13 21:57:00,465 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 25 predicate places. [2022-07-13 21:57:00,465 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 425 transitions, 1059 flow [2022-07-13 21:57:00,466 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) [2022-07-13 21:57:00,466 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:00,466 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] [2022-07-13 21:57:00,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:00,683 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 [2022-07-13 21:57:00,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1765414499, now seen corresponding path program 1 times [2022-07-13 21:57:00,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:00,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525513540] [2022-07-13 21:57:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:00,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:00,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:00,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525513540] [2022-07-13 21:57:00,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525513540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:00,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427690970] [2022-07-13 21:57:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:00,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:00,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:00,802 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) [2022-07-13 21:57:00,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-13 21:57:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:01,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:01,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427690970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:01,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:01,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:01,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032241399] [2022-07-13 21:57:01,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:01,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:01,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:01,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:01,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:01,343 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-07-13 21:57:01,348 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) [2022-07-13 21:57:01,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:01,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-07-13 21:57:01,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:01,826 INFO L129 PetriNetUnfolder]: 0/506 cut-off events. [2022-07-13 21:57:01,827 INFO L130 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-07-13 21:57:01,827 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. [2022-07-13 21:57:01,828 INFO L132 encePairwiseOnDemand]: 494/499 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-07-13 21:57:01,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 456 transitions, 1437 flow [2022-07-13 21:57:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-13 21:57:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-13 21:57:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16679 transitions. [2022-07-13 21:57:01,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7958297547475904 [2022-07-13 21:57:01,835 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16679 transitions. [2022-07-13 21:57:01,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16679 transitions. [2022-07-13 21:57:01,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:01,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16679 transitions. [2022-07-13 21:57:01,846 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) [2022-07-13 21:57:01,855 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) [2022-07-13 21:57:01,857 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) [2022-07-13 21:57:01,857 INFO L186 Difference]: Start difference. First operand has 469 places, 425 transitions, 1059 flow. Second operand 42 states and 16679 transitions. [2022-07-13 21:57:01,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 456 transitions, 1437 flow [2022-07-13 21:57:01,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-07-13 21:57:01,864 INFO L242 Difference]: Finished difference. Result has 486 places, 432 transitions, 1166 flow [2022-07-13 21:57:01,864 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} [2022-07-13 21:57:01,864 INFO L279 CegarLoopForPetriNet]: 444 programPoint places, 42 predicate places. [2022-07-13 21:57:01,864 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 432 transitions, 1166 flow [2022-07-13 21:57:01,866 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) [2022-07-13 21:57:01,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:01,866 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] [2022-07-13 21:57:01,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:02,082 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 [2022-07-13 21:57:02,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash -639908372, now seen corresponding path program 1 times [2022-07-13 21:57:02,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:02,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641994840] [2022-07-13 21:57:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:02,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:02,103 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:02,151 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:02,152 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:02,152 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:02,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:02,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-13 21:57:02,152 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:57:02,153 WARN L231 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:02,153 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-07-13 21:57:02,178 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:57:02,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 473 places, 532 transitions, 1316 flow [2022-07-13 21:57:02,385 INFO L129 PetriNetUnfolder]: 144/1031 cut-off events. [2022-07-13 21:57:02,386 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-13 21:57:02,404 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. [2022-07-13 21:57:02,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 473 places, 532 transitions, 1316 flow [2022-07-13 21:57:02,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 473 places, 532 transitions, 1316 flow [2022-07-13 21:57:02,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:02,423 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:57:02,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:02,426 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-13 21:57:02,426 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:02,426 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:02,426 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] [2022-07-13 21:57:02,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:02,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1576976290, now seen corresponding path program 1 times [2022-07-13 21:57:02,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:02,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957605713] [2022-07-13 21:57:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:02,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:02,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:02,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957605713] [2022-07-13 21:57:02,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957605713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:02,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:02,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:02,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472085350] [2022-07-13 21:57:02,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:02,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:02,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:02,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 532 [2022-07-13 21:57:02,452 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) [2022-07-13 21:57:02,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:02,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 532 [2022-07-13 21:57:02,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:02,656 INFO L129 PetriNetUnfolder]: 0/850 cut-off events. [2022-07-13 21:57:02,656 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-13 21:57:02,657 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. [2022-07-13 21:57:02,658 INFO L132 encePairwiseOnDemand]: 441/532 looper letters, 23 selfloop transitions, 2 changer transitions 11/447 dead transitions. [2022-07-13 21:57:02,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 447 transitions, 1196 flow [2022-07-13 21:57:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1387 transitions. [2022-07-13 21:57:02,660 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8690476190476191 [2022-07-13 21:57:02,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1387 transitions. [2022-07-13 21:57:02,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1387 transitions. [2022-07-13 21:57:02,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:02,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1387 transitions. [2022-07-13 21:57:02,661 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) [2022-07-13 21:57:02,662 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) [2022-07-13 21:57:02,662 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) [2022-07-13 21:57:02,662 INFO L186 Difference]: Start difference. First operand has 473 places, 532 transitions, 1316 flow. Second operand 3 states and 1387 transitions. [2022-07-13 21:57:02,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 447 transitions, 1196 flow [2022-07-13 21:57:02,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 447 transitions, 1014 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:02,668 INFO L242 Difference]: Finished difference. Result has 475 places, 433 transitions, 946 flow [2022-07-13 21:57:02,669 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} [2022-07-13 21:57:02,669 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 2 predicate places. [2022-07-13 21:57:02,669 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 433 transitions, 946 flow [2022-07-13 21:57:02,670 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) [2022-07-13 21:57:02,670 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:02,670 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] [2022-07-13 21:57:02,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-13 21:57:02,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:02,670 INFO L85 PathProgramCache]: Analyzing trace with hash 497768822, now seen corresponding path program 1 times [2022-07-13 21:57:02,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:02,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272933266] [2022-07-13 21:57:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:02,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:02,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:02,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272933266] [2022-07-13 21:57:02,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272933266] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:02,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19669096] [2022-07-13 21:57:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:02,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:02,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:02,703 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) [2022-07-13 21:57:02,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-13 21:57:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:02,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:02,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:02,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19669096] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:02,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:02,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:02,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453780547] [2022-07-13 21:57:02,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:02,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:02,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:02,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:02,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:02,939 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-07-13 21:57:02,940 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) [2022-07-13 21:57:02,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:02,940 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-07-13 21:57:02,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:03,162 INFO L129 PetriNetUnfolder]: 0/674 cut-off events. [2022-07-13 21:57:03,163 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:57:03,163 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. [2022-07-13 21:57:03,164 INFO L132 encePairwiseOnDemand]: 526/532 looper letters, 24 selfloop transitions, 9 changer transitions 0/443 dead transitions. [2022-07-13 21:57:03,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 443 transitions, 1034 flow [2022-07-13 21:57:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3824 transitions. [2022-07-13 21:57:03,166 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7986633249791144 [2022-07-13 21:57:03,166 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3824 transitions. [2022-07-13 21:57:03,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3824 transitions. [2022-07-13 21:57:03,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:03,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3824 transitions. [2022-07-13 21:57:03,169 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) [2022-07-13 21:57:03,171 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) [2022-07-13 21:57:03,171 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) [2022-07-13 21:57:03,171 INFO L186 Difference]: Start difference. First operand has 475 places, 433 transitions, 946 flow. Second operand 9 states and 3824 transitions. [2022-07-13 21:57:03,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 443 transitions, 1034 flow [2022-07-13 21:57:03,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 443 transitions, 1032 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:03,183 INFO L242 Difference]: Finished difference. Result has 474 places, 439 transitions, 994 flow [2022-07-13 21:57:03,183 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} [2022-07-13 21:57:03,184 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 1 predicate places. [2022-07-13 21:57:03,184 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 439 transitions, 994 flow [2022-07-13 21:57:03,184 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) [2022-07-13 21:57:03,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:03,185 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] [2022-07-13 21:57:03,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:03,401 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 [2022-07-13 21:57:03,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:03,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:03,402 INFO L85 PathProgramCache]: Analyzing trace with hash 407301857, now seen corresponding path program 1 times [2022-07-13 21:57:03,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:03,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800801896] [2022-07-13 21:57:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:03,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:03,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800801896] [2022-07-13 21:57:03,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800801896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378142650] [2022-07-13 21:57:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:03,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:03,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:03,457 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) [2022-07-13 21:57:03,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-13 21:57:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:03,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:03,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:03,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378142650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:03,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:03,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:03,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910466079] [2022-07-13 21:57:03,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:03,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:03,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:03,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:03,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:03,788 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-07-13 21:57:03,790 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) [2022-07-13 21:57:03,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:03,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-07-13 21:57:03,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:04,102 INFO L129 PetriNetUnfolder]: 0/630 cut-off events. [2022-07-13 21:57:04,102 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-07-13 21:57:04,102 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. [2022-07-13 21:57:04,103 INFO L132 encePairwiseOnDemand]: 526/532 looper letters, 32 selfloop transitions, 21 changer transitions 0/463 dead transitions. [2022-07-13 21:57:04,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 463 transitions, 1208 flow [2022-07-13 21:57:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8898 transitions. [2022-07-13 21:57:04,108 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7964554242749732 [2022-07-13 21:57:04,108 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8898 transitions. [2022-07-13 21:57:04,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8898 transitions. [2022-07-13 21:57:04,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:04,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8898 transitions. [2022-07-13 21:57:04,114 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) [2022-07-13 21:57:04,120 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) [2022-07-13 21:57:04,121 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) [2022-07-13 21:57:04,121 INFO L186 Difference]: Start difference. First operand has 474 places, 439 transitions, 994 flow. Second operand 21 states and 8898 transitions. [2022-07-13 21:57:04,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 463 transitions, 1208 flow [2022-07-13 21:57:04,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 463 transitions, 1194 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:04,128 INFO L242 Difference]: Finished difference. Result has 498 places, 452 transitions, 1118 flow [2022-07-13 21:57:04,128 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} [2022-07-13 21:57:04,128 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 25 predicate places. [2022-07-13 21:57:04,129 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 452 transitions, 1118 flow [2022-07-13 21:57:04,129 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) [2022-07-13 21:57:04,129 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:04,130 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] [2022-07-13 21:57:04,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:04,336 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 [2022-07-13 21:57:04,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:04,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1073274307, now seen corresponding path program 1 times [2022-07-13 21:57:04,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:04,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326881254] [2022-07-13 21:57:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:04,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:04,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:04,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326881254] [2022-07-13 21:57:04,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326881254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:04,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926914241] [2022-07-13 21:57:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:04,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:04,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:04,442 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) [2022-07-13 21:57:04,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-13 21:57:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:04,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:04,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:04,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926914241] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:04,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:04,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034161225] [2022-07-13 21:57:04,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:04,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:04,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:04,930 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-07-13 21:57:04,934 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) [2022-07-13 21:57:04,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:04,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-07-13 21:57:04,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:05,461 INFO L129 PetriNetUnfolder]: 0/542 cut-off events. [2022-07-13 21:57:05,461 INFO L130 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-07-13 21:57:05,461 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. [2022-07-13 21:57:05,462 INFO L132 encePairwiseOnDemand]: 527/532 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-07-13 21:57:05,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 488 transitions, 1542 flow [2022-07-13 21:57:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:57:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:57:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19041 transitions. [2022-07-13 21:57:05,470 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953634085213033 [2022-07-13 21:57:05,470 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19041 transitions. [2022-07-13 21:57:05,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19041 transitions. [2022-07-13 21:57:05,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:05,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19041 transitions. [2022-07-13 21:57:05,484 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) [2022-07-13 21:57:05,496 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) [2022-07-13 21:57:05,499 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) [2022-07-13 21:57:05,499 INFO L186 Difference]: Start difference. First operand has 498 places, 452 transitions, 1118 flow. Second operand 45 states and 19041 transitions. [2022-07-13 21:57:05,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 488 transitions, 1542 flow [2022-07-13 21:57:05,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-07-13 21:57:05,506 INFO L242 Difference]: Finished difference. Result has 518 places, 462 transitions, 1249 flow [2022-07-13 21:57:05,507 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} [2022-07-13 21:57:05,507 INFO L279 CegarLoopForPetriNet]: 473 programPoint places, 45 predicate places. [2022-07-13 21:57:05,507 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 462 transitions, 1249 flow [2022-07-13 21:57:05,509 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) [2022-07-13 21:57:05,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:05,509 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] [2022-07-13 21:57:05,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:05,726 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 [2022-07-13 21:57:05,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1626722253, now seen corresponding path program 1 times [2022-07-13 21:57:05,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:05,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732817648] [2022-07-13 21:57:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:05,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:05,755 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:05,781 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:05,781 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:05,781 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:05,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:05,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-07-13 21:57:05,782 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:57:05,782 WARN L231 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:05,782 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-07-13 21:57:05,820 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:57:05,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 502 places, 565 transitions, 1415 flow [2022-07-13 21:57:06,055 INFO L129 PetriNetUnfolder]: 154/1100 cut-off events. [2022-07-13 21:57:06,055 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-13 21:57:06,095 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. [2022-07-13 21:57:06,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 502 places, 565 transitions, 1415 flow [2022-07-13 21:57:06,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 502 places, 565 transitions, 1415 flow [2022-07-13 21:57:06,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:06,114 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:57:06,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:06,120 INFO L129 PetriNetUnfolder]: 5/81 cut-off events. [2022-07-13 21:57:06,120 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:06,120 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:06,120 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:06,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1042790754, now seen corresponding path program 1 times [2022-07-13 21:57:06,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:06,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695974950] [2022-07-13 21:57:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:06,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:06,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:06,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695974950] [2022-07-13 21:57:06,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695974950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:06,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:06,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:06,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965005033] [2022-07-13 21:57:06,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:06,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:06,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:06,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:06,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:06,143 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 565 [2022-07-13 21:57:06,144 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) [2022-07-13 21:57:06,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:06,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 565 [2022-07-13 21:57:06,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:06,419 INFO L129 PetriNetUnfolder]: 0/908 cut-off events. [2022-07-13 21:57:06,420 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-13 21:57:06,420 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. [2022-07-13 21:57:06,421 INFO L132 encePairwiseOnDemand]: 468/565 looper letters, 24 selfloop transitions, 2 changer transitions 11/474 dead transitions. [2022-07-13 21:57:06,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 474 transitions, 1285 flow [2022-07-13 21:57:06,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1472 transitions. [2022-07-13 21:57:06,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8684365781710914 [2022-07-13 21:57:06,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1472 transitions. [2022-07-13 21:57:06,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1472 transitions. [2022-07-13 21:57:06,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:06,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1472 transitions. [2022-07-13 21:57:06,424 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) [2022-07-13 21:57:06,425 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) [2022-07-13 21:57:06,425 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) [2022-07-13 21:57:06,425 INFO L186 Difference]: Start difference. First operand has 502 places, 565 transitions, 1415 flow. Second operand 3 states and 1472 transitions. [2022-07-13 21:57:06,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 474 transitions, 1285 flow [2022-07-13 21:57:06,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 474 transitions, 1075 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:06,431 INFO L242 Difference]: Finished difference. Result has 504 places, 460 transitions, 1005 flow [2022-07-13 21:57:06,431 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} [2022-07-13 21:57:06,432 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 2 predicate places. [2022-07-13 21:57:06,432 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 460 transitions, 1005 flow [2022-07-13 21:57:06,432 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) [2022-07-13 21:57:06,432 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:06,432 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:06,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-07-13 21:57:06,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:06,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1743828086, now seen corresponding path program 1 times [2022-07-13 21:57:06,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:06,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231317559] [2022-07-13 21:57:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:06,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:06,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:06,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231317559] [2022-07-13 21:57:06,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231317559] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:06,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515625136] [2022-07-13 21:57:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:06,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:06,453 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) [2022-07-13 21:57:06,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-13 21:57:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:06,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:06,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:06,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:06,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515625136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:06,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:06,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:06,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700218395] [2022-07-13 21:57:06,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:06,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:06,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:06,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:06,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:06,761 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-07-13 21:57:06,762 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) [2022-07-13 21:57:06,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:06,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-07-13 21:57:06,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:06,991 INFO L129 PetriNetUnfolder]: 0/721 cut-off events. [2022-07-13 21:57:06,992 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-13 21:57:06,992 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. [2022-07-13 21:57:06,993 INFO L132 encePairwiseOnDemand]: 559/565 looper letters, 25 selfloop transitions, 9 changer transitions 0/470 dead transitions. [2022-07-13 21:57:06,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 470 transitions, 1095 flow [2022-07-13 21:57:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4059 transitions. [2022-07-13 21:57:06,995 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7982300884955752 [2022-07-13 21:57:06,996 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4059 transitions. [2022-07-13 21:57:06,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4059 transitions. [2022-07-13 21:57:06,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:06,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4059 transitions. [2022-07-13 21:57:06,998 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) [2022-07-13 21:57:07,001 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) [2022-07-13 21:57:07,001 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) [2022-07-13 21:57:07,001 INFO L186 Difference]: Start difference. First operand has 504 places, 460 transitions, 1005 flow. Second operand 9 states and 4059 transitions. [2022-07-13 21:57:07,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 470 transitions, 1095 flow [2022-07-13 21:57:07,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 470 transitions, 1093 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:07,007 INFO L242 Difference]: Finished difference. Result has 503 places, 466 transitions, 1053 flow [2022-07-13 21:57:07,007 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} [2022-07-13 21:57:07,007 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 1 predicate places. [2022-07-13 21:57:07,008 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 466 transitions, 1053 flow [2022-07-13 21:57:07,008 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) [2022-07-13 21:57:07,008 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:07,008 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] [2022-07-13 21:57:07,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:07,215 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 [2022-07-13 21:57:07,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash 435117153, now seen corresponding path program 1 times [2022-07-13 21:57:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951742781] [2022-07-13 21:57:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:07,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:07,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951742781] [2022-07-13 21:57:07,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951742781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:07,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587687131] [2022-07-13 21:57:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:07,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:07,269 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) [2022-07-13 21:57:07,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-13 21:57:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:07,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:07,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:07,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:07,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587687131] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:07,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:07,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:07,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238746435] [2022-07-13 21:57:07,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:07,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:07,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:07,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:07,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:07,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-07-13 21:57:07,602 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) [2022-07-13 21:57:07,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:07,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-07-13 21:57:07,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:07,901 INFO L129 PetriNetUnfolder]: 0/677 cut-off events. [2022-07-13 21:57:07,901 INFO L130 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-07-13 21:57:07,902 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. [2022-07-13 21:57:07,903 INFO L132 encePairwiseOnDemand]: 559/565 looper letters, 33 selfloop transitions, 21 changer transitions 0/490 dead transitions. [2022-07-13 21:57:07,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 490 transitions, 1269 flow [2022-07-13 21:57:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9445 transitions. [2022-07-13 21:57:07,907 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7960387694900969 [2022-07-13 21:57:07,907 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9445 transitions. [2022-07-13 21:57:07,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9445 transitions. [2022-07-13 21:57:07,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:07,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9445 transitions. [2022-07-13 21:57:07,913 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) [2022-07-13 21:57:07,919 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) [2022-07-13 21:57:07,919 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) [2022-07-13 21:57:07,920 INFO L186 Difference]: Start difference. First operand has 503 places, 466 transitions, 1053 flow. Second operand 21 states and 9445 transitions. [2022-07-13 21:57:07,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 490 transitions, 1269 flow [2022-07-13 21:57:07,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 490 transitions, 1255 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:07,926 INFO L242 Difference]: Finished difference. Result has 527 places, 479 transitions, 1177 flow [2022-07-13 21:57:07,927 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} [2022-07-13 21:57:07,927 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 25 predicate places. [2022-07-13 21:57:07,927 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 479 transitions, 1177 flow [2022-07-13 21:57:07,928 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) [2022-07-13 21:57:07,928 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:07,928 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] [2022-07-13 21:57:07,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:08,135 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 [2022-07-13 21:57:08,136 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:08,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1656795203, now seen corresponding path program 1 times [2022-07-13 21:57:08,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:08,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966473130] [2022-07-13 21:57:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:08,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:08,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:08,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966473130] [2022-07-13 21:57:08,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966473130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:08,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792673868] [2022-07-13 21:57:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:08,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:08,255 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) [2022-07-13 21:57:08,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-13 21:57:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:08,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:08,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:08,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:08,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792673868] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:08,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:08,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:08,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853035447] [2022-07-13 21:57:08,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:08,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:08,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:08,750 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-07-13 21:57:08,754 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) [2022-07-13 21:57:08,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:08,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-07-13 21:57:08,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:09,433 INFO L129 PetriNetUnfolder]: 0/589 cut-off events. [2022-07-13 21:57:09,434 INFO L130 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-07-13 21:57:09,434 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. [2022-07-13 21:57:09,435 INFO L132 encePairwiseOnDemand]: 559/565 looper letters, 49 selfloop transitions, 45 changer transitions 0/530 dead transitions. [2022-07-13 21:57:09,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 530 transitions, 1681 flow [2022-07-13 21:57:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:57:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:57:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20217 transitions. [2022-07-13 21:57:09,443 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951622418879056 [2022-07-13 21:57:09,443 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20217 transitions. [2022-07-13 21:57:09,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20217 transitions. [2022-07-13 21:57:09,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:09,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20217 transitions. [2022-07-13 21:57:09,456 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) [2022-07-13 21:57:09,505 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) [2022-07-13 21:57:09,506 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) [2022-07-13 21:57:09,507 INFO L186 Difference]: Start difference. First operand has 527 places, 479 transitions, 1177 flow. Second operand 45 states and 20217 transitions. [2022-07-13 21:57:09,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 530 transitions, 1681 flow [2022-07-13 21:57:09,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 530 transitions, 1641 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:57:09,513 INFO L242 Difference]: Finished difference. Result has 574 places, 504 transitions, 1455 flow [2022-07-13 21:57:09,514 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} [2022-07-13 21:57:09,514 INFO L279 CegarLoopForPetriNet]: 502 programPoint places, 72 predicate places. [2022-07-13 21:57:09,514 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 504 transitions, 1455 flow [2022-07-13 21:57:09,516 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) [2022-07-13 21:57:09,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:09,516 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] [2022-07-13 21:57:09,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-13 21:57:09,733 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 [2022-07-13 21:57:09,733 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:09,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:09,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1018229807, now seen corresponding path program 1 times [2022-07-13 21:57:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:09,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338109776] [2022-07-13 21:57:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:09,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:09,757 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:09,791 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:09,792 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:09,792 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:09,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:09,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-07-13 21:57:09,792 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:57:09,793 WARN L231 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:09,793 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-07-13 21:57:09,820 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:57:09,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 531 places, 598 transitions, 1516 flow [2022-07-13 21:57:10,054 INFO L129 PetriNetUnfolder]: 164/1169 cut-off events. [2022-07-13 21:57:10,055 INFO L130 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-07-13 21:57:10,098 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. [2022-07-13 21:57:10,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 531 places, 598 transitions, 1516 flow [2022-07-13 21:57:10,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 531 places, 598 transitions, 1516 flow [2022-07-13 21:57:10,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:10,117 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:57:10,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:10,120 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2022-07-13 21:57:10,120 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:10,120 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:10,120 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:10,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash 434742049, now seen corresponding path program 1 times [2022-07-13 21:57:10,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:10,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096650862] [2022-07-13 21:57:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:10,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:10,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:10,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096650862] [2022-07-13 21:57:10,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096650862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:10,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:10,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:10,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196963979] [2022-07-13 21:57:10,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:10,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:10,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:10,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:10,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:10,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 598 [2022-07-13 21:57:10,133 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) [2022-07-13 21:57:10,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:10,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 598 [2022-07-13 21:57:10,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:10,390 INFO L129 PetriNetUnfolder]: 0/988 cut-off events. [2022-07-13 21:57:10,390 INFO L130 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2022-07-13 21:57:10,391 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. [2022-07-13 21:57:10,392 INFO L132 encePairwiseOnDemand]: 498/598 looper letters, 16 selfloop transitions, 0 changer transitions 11/497 dead transitions. [2022-07-13 21:57:10,392 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1346 flow [2022-07-13 21:57:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1078 transitions. [2022-07-13 21:57:10,393 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9013377926421404 [2022-07-13 21:57:10,393 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1078 transitions. [2022-07-13 21:57:10,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1078 transitions. [2022-07-13 21:57:10,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:10,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1078 transitions. [2022-07-13 21:57:10,394 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) [2022-07-13 21:57:10,395 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) [2022-07-13 21:57:10,395 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) [2022-07-13 21:57:10,395 INFO L186 Difference]: Start difference. First operand has 531 places, 598 transitions, 1516 flow. Second operand 2 states and 1078 transitions. [2022-07-13 21:57:10,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1346 flow [2022-07-13 21:57:10,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 497 transitions, 1106 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:10,401 INFO L242 Difference]: Finished difference. Result has 531 places, 486 transitions, 1052 flow [2022-07-13 21:57:10,401 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} [2022-07-13 21:57:10,401 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 0 predicate places. [2022-07-13 21:57:10,402 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 486 transitions, 1052 flow [2022-07-13 21:57:10,402 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) [2022-07-13 21:57:10,402 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:10,402 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:10,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-07-13 21:57:10,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1362209310, now seen corresponding path program 1 times [2022-07-13 21:57:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:10,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288936126] [2022-07-13 21:57:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:10,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:10,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:10,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288936126] [2022-07-13 21:57:10,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288936126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:10,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:10,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:10,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213019870] [2022-07-13 21:57:10,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:10,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:10,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:10,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:10,419 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 598 [2022-07-13 21:57:10,420 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) [2022-07-13 21:57:10,420 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:10,420 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 598 [2022-07-13 21:57:10,420 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:10,614 INFO L129 PetriNetUnfolder]: 0/790 cut-off events. [2022-07-13 21:57:10,614 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-13 21:57:10,614 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. [2022-07-13 21:57:10,616 INFO L132 encePairwiseOnDemand]: 595/598 looper letters, 25 selfloop transitions, 2 changer transitions 0/490 dead transitions. [2022-07-13 21:57:10,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 490 transitions, 1114 flow [2022-07-13 21:57:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1450 transitions. [2022-07-13 21:57:10,617 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8082497212931996 [2022-07-13 21:57:10,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1450 transitions. [2022-07-13 21:57:10,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1450 transitions. [2022-07-13 21:57:10,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:10,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1450 transitions. [2022-07-13 21:57:10,619 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) [2022-07-13 21:57:10,620 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) [2022-07-13 21:57:10,620 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) [2022-07-13 21:57:10,620 INFO L186 Difference]: Start difference. First operand has 531 places, 486 transitions, 1052 flow. Second operand 3 states and 1450 transitions. [2022-07-13 21:57:10,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 490 transitions, 1114 flow [2022-07-13 21:57:10,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 490 transitions, 1114 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:10,626 INFO L242 Difference]: Finished difference. Result has 523 places, 487 transitions, 1064 flow [2022-07-13 21:57:10,627 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} [2022-07-13 21:57:10,627 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, -8 predicate places. [2022-07-13 21:57:10,627 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 487 transitions, 1064 flow [2022-07-13 21:57:10,628 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) [2022-07-13 21:57:10,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:10,628 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] [2022-07-13 21:57:10,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-07-13 21:57:10,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:10,628 INFO L85 PathProgramCache]: Analyzing trace with hash -112851242, now seen corresponding path program 1 times [2022-07-13 21:57:10,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:10,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077525883] [2022-07-13 21:57:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:10,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:10,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:10,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077525883] [2022-07-13 21:57:10,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077525883] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:10,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826248481] [2022-07-13 21:57:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:10,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:10,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:10,650 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) [2022-07-13 21:57:10,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-13 21:57:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:10,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:10,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:10,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:10,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826248481] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:10,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:10,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:10,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927634141] [2022-07-13 21:57:10,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:10,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:10,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:10,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:10,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:10,959 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-13 21:57:10,960 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) [2022-07-13 21:57:10,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:10,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-13 21:57:10,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:11,209 INFO L129 PetriNetUnfolder]: 0/768 cut-off events. [2022-07-13 21:57:11,209 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-13 21:57:11,209 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. [2022-07-13 21:57:11,211 INFO L132 encePairwiseOnDemand]: 592/598 looper letters, 26 selfloop transitions, 9 changer transitions 0/497 dead transitions. [2022-07-13 21:57:11,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1156 flow [2022-07-13 21:57:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:11,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4294 transitions. [2022-07-13 21:57:11,213 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7978446674098848 [2022-07-13 21:57:11,213 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4294 transitions. [2022-07-13 21:57:11,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4294 transitions. [2022-07-13 21:57:11,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:11,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4294 transitions. [2022-07-13 21:57:11,216 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) [2022-07-13 21:57:11,219 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) [2022-07-13 21:57:11,219 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) [2022-07-13 21:57:11,219 INFO L186 Difference]: Start difference. First operand has 523 places, 487 transitions, 1064 flow. Second operand 9 states and 4294 transitions. [2022-07-13 21:57:11,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1156 flow [2022-07-13 21:57:11,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 497 transitions, 1154 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:11,225 INFO L242 Difference]: Finished difference. Result has 533 places, 493 transitions, 1112 flow [2022-07-13 21:57:11,225 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} [2022-07-13 21:57:11,226 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 2 predicate places. [2022-07-13 21:57:11,226 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 493 transitions, 1112 flow [2022-07-13 21:57:11,226 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) [2022-07-13 21:57:11,227 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:11,227 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] [2022-07-13 21:57:11,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:11,440 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 [2022-07-13 21:57:11,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:11,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1846186625, now seen corresponding path program 1 times [2022-07-13 21:57:11,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:11,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610131210] [2022-07-13 21:57:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:11,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:11,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:11,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610131210] [2022-07-13 21:57:11,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610131210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470077090] [2022-07-13 21:57:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:11,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:11,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:11,480 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) [2022-07-13 21:57:11,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-13 21:57:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:11,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:11,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:11,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:11,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470077090] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:11,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:11,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465109884] [2022-07-13 21:57:11,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:11,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:11,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:11,836 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-13 21:57:11,838 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) [2022-07-13 21:57:11,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:11,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-13 21:57:11,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:12,168 INFO L129 PetriNetUnfolder]: 0/724 cut-off events. [2022-07-13 21:57:12,172 INFO L130 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-07-13 21:57:12,173 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. [2022-07-13 21:57:12,174 INFO L132 encePairwiseOnDemand]: 592/598 looper letters, 34 selfloop transitions, 21 changer transitions 0/517 dead transitions. [2022-07-13 21:57:12,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 517 transitions, 1330 flow [2022-07-13 21:57:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9992 transitions. [2022-07-13 21:57:12,179 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956681000159261 [2022-07-13 21:57:12,179 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9992 transitions. [2022-07-13 21:57:12,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9992 transitions. [2022-07-13 21:57:12,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:12,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9992 transitions. [2022-07-13 21:57:12,185 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) [2022-07-13 21:57:12,191 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) [2022-07-13 21:57:12,191 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) [2022-07-13 21:57:12,191 INFO L186 Difference]: Start difference. First operand has 533 places, 493 transitions, 1112 flow. Second operand 21 states and 9992 transitions. [2022-07-13 21:57:12,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 517 transitions, 1330 flow [2022-07-13 21:57:12,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 517 transitions, 1316 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:12,199 INFO L242 Difference]: Finished difference. Result has 557 places, 506 transitions, 1236 flow [2022-07-13 21:57:12,200 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} [2022-07-13 21:57:12,200 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 26 predicate places. [2022-07-13 21:57:12,200 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 506 transitions, 1236 flow [2022-07-13 21:57:12,201 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) [2022-07-13 21:57:12,201 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:12,201 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] [2022-07-13 21:57:12,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:12,402 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 [2022-07-13 21:57:12,402 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash -778990109, now seen corresponding path program 1 times [2022-07-13 21:57:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:12,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837338248] [2022-07-13 21:57:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:12,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:12,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837338248] [2022-07-13 21:57:12,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837338248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:12,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511380044] [2022-07-13 21:57:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:12,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:12,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:12,538 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) [2022-07-13 21:57:12,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-13 21:57:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:12,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:12,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:13,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511380044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:13,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:13,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:13,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925722241] [2022-07-13 21:57:13,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:13,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:13,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:13,090 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-13 21:57:13,095 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) [2022-07-13 21:57:13,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:13,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-13 21:57:13,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:13,712 INFO L129 PetriNetUnfolder]: 0/636 cut-off events. [2022-07-13 21:57:13,712 INFO L130 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-07-13 21:57:13,712 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. [2022-07-13 21:57:13,713 INFO L132 encePairwiseOnDemand]: 592/598 looper letters, 50 selfloop transitions, 45 changer transitions 0/557 dead transitions. [2022-07-13 21:57:13,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 557 transitions, 1742 flow [2022-07-13 21:57:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:57:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:57:13,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21388 transitions. [2022-07-13 21:57:13,721 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7947974730583426 [2022-07-13 21:57:13,722 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21388 transitions. [2022-07-13 21:57:13,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21388 transitions. [2022-07-13 21:57:13,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:13,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21388 transitions. [2022-07-13 21:57:13,736 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) [2022-07-13 21:57:13,750 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) [2022-07-13 21:57:13,753 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) [2022-07-13 21:57:13,753 INFO L186 Difference]: Start difference. First operand has 557 places, 506 transitions, 1236 flow. Second operand 45 states and 21388 transitions. [2022-07-13 21:57:13,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 557 transitions, 1742 flow [2022-07-13 21:57:13,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 557 transitions, 1702 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:57:13,761 INFO L242 Difference]: Finished difference. Result has 604 places, 531 transitions, 1514 flow [2022-07-13 21:57:13,762 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} [2022-07-13 21:57:13,762 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 73 predicate places. [2022-07-13 21:57:13,762 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 531 transitions, 1514 flow [2022-07-13 21:57:13,764 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) [2022-07-13 21:57:13,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:13,764 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] [2022-07-13 21:57:13,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:13,979 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 [2022-07-13 21:57:13,980 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:13,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:13,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1064402135, now seen corresponding path program 1 times [2022-07-13 21:57:13,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:13,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811109134] [2022-07-13 21:57:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:13,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:14,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:14,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811109134] [2022-07-13 21:57:14,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811109134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:14,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541469658] [2022-07-13 21:57:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:14,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:14,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:14,312 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) [2022-07-13 21:57:14,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-13 21:57:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:14,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:57:14,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:14,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:15,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541469658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:15,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:15,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:57:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408056223] [2022-07-13 21:57:15,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:15,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:57:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:15,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:57:15,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:57:15,158 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-07-13 21:57:15,166 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) [2022-07-13 21:57:15,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:15,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-07-13 21:57:15,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:15,762 INFO L129 PetriNetUnfolder]: 0/614 cut-off events. [2022-07-13 21:57:15,762 INFO L130 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-07-13 21:57:15,763 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. [2022-07-13 21:57:15,763 INFO L132 encePairwiseOnDemand]: 593/598 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-07-13 21:57:15,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 552 transitions, 1852 flow [2022-07-13 21:57:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-13 21:57:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-13 21:57:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24225 transitions. [2022-07-13 21:57:15,772 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.794314381270903 [2022-07-13 21:57:15,773 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24225 transitions. [2022-07-13 21:57:15,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24225 transitions. [2022-07-13 21:57:15,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:15,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24225 transitions. [2022-07-13 21:57:15,789 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) [2022-07-13 21:57:15,804 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) [2022-07-13 21:57:15,807 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) [2022-07-13 21:57:15,808 INFO L186 Difference]: Start difference. First operand has 604 places, 531 transitions, 1514 flow. Second operand 51 states and 24225 transitions. [2022-07-13 21:57:15,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 552 transitions, 1852 flow [2022-07-13 21:57:15,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-07-13 21:57:15,815 INFO L242 Difference]: Finished difference. Result has 610 places, 523 transitions, 1471 flow [2022-07-13 21:57:15,816 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} [2022-07-13 21:57:15,816 INFO L279 CegarLoopForPetriNet]: 531 programPoint places, 79 predicate places. [2022-07-13 21:57:15,816 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 523 transitions, 1471 flow [2022-07-13 21:57:15,819 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) [2022-07-13 21:57:15,819 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:15,820 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] [2022-07-13 21:57:15,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:16,038 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 [2022-07-13 21:57:16,038 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:16,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1486777266, now seen corresponding path program 1 times [2022-07-13 21:57:16,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:16,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462265248] [2022-07-13 21:57:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:16,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:16,082 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:16,120 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:16,124 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:16,124 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:16,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:16,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-07-13 21:57:16,125 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:16,125 WARN L231 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:16,125 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-07-13 21:57:16,176 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:57:16,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 560 places, 631 transitions, 1619 flow [2022-07-13 21:57:16,437 INFO L129 PetriNetUnfolder]: 174/1238 cut-off events. [2022-07-13 21:57:16,437 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-13 21:57:16,484 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. [2022-07-13 21:57:16,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 560 places, 631 transitions, 1619 flow [2022-07-13 21:57:16,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 560 places, 631 transitions, 1619 flow [2022-07-13 21:57:16,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:16,507 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:57:16,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:16,509 INFO L129 PetriNetUnfolder]: 5/79 cut-off events. [2022-07-13 21:57:16,510 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:16,510 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:16,510 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:16,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:16,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:16,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1343056606, now seen corresponding path program 1 times [2022-07-13 21:57:16,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:16,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185430082] [2022-07-13 21:57:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:16,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:16,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:16,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185430082] [2022-07-13 21:57:16,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185430082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:16,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:16,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:16,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583155260] [2022-07-13 21:57:16,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:16,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:16,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:16,527 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 631 [2022-07-13 21:57:16,527 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) [2022-07-13 21:57:16,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:16,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 631 [2022-07-13 21:57:16,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:16,857 INFO L129 PetriNetUnfolder]: 0/1024 cut-off events. [2022-07-13 21:57:16,857 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-13 21:57:16,857 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. [2022-07-13 21:57:16,859 INFO L132 encePairwiseOnDemand]: 522/631 looper letters, 26 selfloop transitions, 2 changer transitions 11/528 dead transitions. [2022-07-13 21:57:16,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 528 transitions, 1469 flow [2022-07-13 21:57:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1642 transitions. [2022-07-13 21:57:16,861 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8674062334918119 [2022-07-13 21:57:16,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1642 transitions. [2022-07-13 21:57:16,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1642 transitions. [2022-07-13 21:57:16,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:16,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1642 transitions. [2022-07-13 21:57:16,862 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) [2022-07-13 21:57:16,863 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) [2022-07-13 21:57:16,863 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) [2022-07-13 21:57:16,863 INFO L186 Difference]: Start difference. First operand has 560 places, 631 transitions, 1619 flow. Second operand 3 states and 1642 transitions. [2022-07-13 21:57:16,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 528 transitions, 1469 flow [2022-07-13 21:57:16,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 528 transitions, 1197 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:16,870 INFO L242 Difference]: Finished difference. Result has 562 places, 514 transitions, 1123 flow [2022-07-13 21:57:16,870 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} [2022-07-13 21:57:16,871 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 2 predicate places. [2022-07-13 21:57:16,871 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 514 transitions, 1123 flow [2022-07-13 21:57:16,871 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) [2022-07-13 21:57:16,871 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:16,871 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] [2022-07-13 21:57:16,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-07-13 21:57:16,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash -777301866, now seen corresponding path program 1 times [2022-07-13 21:57:16,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:16,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984843877] [2022-07-13 21:57:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:16,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:16,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:16,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984843877] [2022-07-13 21:57:16,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984843877] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:16,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000333394] [2022-07-13 21:57:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:16,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:16,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:16,899 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) [2022-07-13 21:57:16,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-13 21:57:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:17,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:17,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:17,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000333394] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:17,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:17,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:17,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989791609] [2022-07-13 21:57:17,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:17,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:17,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:17,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-13 21:57:17,216 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) [2022-07-13 21:57:17,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:17,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-13 21:57:17,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:17,489 INFO L129 PetriNetUnfolder]: 0/815 cut-off events. [2022-07-13 21:57:17,489 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-13 21:57:17,489 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. [2022-07-13 21:57:17,491 INFO L132 encePairwiseOnDemand]: 625/631 looper letters, 27 selfloop transitions, 9 changer transitions 0/524 dead transitions. [2022-07-13 21:57:17,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 524 transitions, 1217 flow [2022-07-13 21:57:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:17,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4529 transitions. [2022-07-13 21:57:17,494 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7974995597816517 [2022-07-13 21:57:17,494 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4529 transitions. [2022-07-13 21:57:17,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4529 transitions. [2022-07-13 21:57:17,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:17,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4529 transitions. [2022-07-13 21:57:17,497 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) [2022-07-13 21:57:17,499 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) [2022-07-13 21:57:17,500 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) [2022-07-13 21:57:17,500 INFO L186 Difference]: Start difference. First operand has 562 places, 514 transitions, 1123 flow. Second operand 9 states and 4529 transitions. [2022-07-13 21:57:17,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 524 transitions, 1217 flow [2022-07-13 21:57:17,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 524 transitions, 1215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:17,506 INFO L242 Difference]: Finished difference. Result has 561 places, 520 transitions, 1171 flow [2022-07-13 21:57:17,507 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} [2022-07-13 21:57:17,507 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 1 predicate places. [2022-07-13 21:57:17,507 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 520 transitions, 1171 flow [2022-07-13 21:57:17,508 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) [2022-07-13 21:57:17,508 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:17,508 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] [2022-07-13 21:57:17,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-13 21:57:17,726 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 [2022-07-13 21:57:17,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:17,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:17,727 INFO L85 PathProgramCache]: Analyzing trace with hash 345542977, now seen corresponding path program 1 times [2022-07-13 21:57:17,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:17,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4069630] [2022-07-13 21:57:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:17,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:17,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4069630] [2022-07-13 21:57:17,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4069630] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:17,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627651680] [2022-07-13 21:57:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:17,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:17,769 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) [2022-07-13 21:57:17,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-13 21:57:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:18,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:18,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:18,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:18,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627651680] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:18,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:18,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:18,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153448382] [2022-07-13 21:57:18,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:18,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:18,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:18,168 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-13 21:57:18,171 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) [2022-07-13 21:57:18,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:18,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-13 21:57:18,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:18,558 INFO L129 PetriNetUnfolder]: 0/771 cut-off events. [2022-07-13 21:57:18,558 INFO L130 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-07-13 21:57:18,559 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. [2022-07-13 21:57:18,560 INFO L132 encePairwiseOnDemand]: 625/631 looper letters, 35 selfloop transitions, 21 changer transitions 0/544 dead transitions. [2022-07-13 21:57:18,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 544 transitions, 1391 flow [2022-07-13 21:57:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10539 transitions. [2022-07-13 21:57:18,564 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953362010414309 [2022-07-13 21:57:18,564 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10539 transitions. [2022-07-13 21:57:18,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10539 transitions. [2022-07-13 21:57:18,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:18,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10539 transitions. [2022-07-13 21:57:18,571 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) [2022-07-13 21:57:18,577 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) [2022-07-13 21:57:18,578 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) [2022-07-13 21:57:18,578 INFO L186 Difference]: Start difference. First operand has 561 places, 520 transitions, 1171 flow. Second operand 21 states and 10539 transitions. [2022-07-13 21:57:18,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 544 transitions, 1391 flow [2022-07-13 21:57:18,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 544 transitions, 1377 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:18,585 INFO L242 Difference]: Finished difference. Result has 585 places, 533 transitions, 1295 flow [2022-07-13 21:57:18,585 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} [2022-07-13 21:57:18,586 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 25 predicate places. [2022-07-13 21:57:18,586 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 533 transitions, 1295 flow [2022-07-13 21:57:18,587 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) [2022-07-13 21:57:18,587 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:18,587 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] [2022-07-13 21:57:18,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-13 21:57:18,796 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 [2022-07-13 21:57:18,796 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:18,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1939114333, now seen corresponding path program 1 times [2022-07-13 21:57:18,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:18,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671025189] [2022-07-13 21:57:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:18,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:18,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:18,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671025189] [2022-07-13 21:57:18,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671025189] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:18,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156400077] [2022-07-13 21:57:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:18,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:18,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:18,912 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) [2022-07-13 21:57:18,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-13 21:57:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:19,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:19,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:19,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:19,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156400077] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:19,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:19,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:19,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934410224] [2022-07-13 21:57:19,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:19,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:19,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:19,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:19,505 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-13 21:57:19,509 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) [2022-07-13 21:57:19,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:19,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-13 21:57:19,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:19,961 INFO L129 PetriNetUnfolder]: 0/683 cut-off events. [2022-07-13 21:57:19,961 INFO L130 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-07-13 21:57:19,961 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. [2022-07-13 21:57:19,962 INFO L132 encePairwiseOnDemand]: 625/631 looper letters, 51 selfloop transitions, 45 changer transitions 0/584 dead transitions. [2022-07-13 21:57:19,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 584 transitions, 1803 flow [2022-07-13 21:57:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:57:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:57:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22559 transitions. [2022-07-13 21:57:19,971 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7944708575453425 [2022-07-13 21:57:19,971 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22559 transitions. [2022-07-13 21:57:19,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22559 transitions. [2022-07-13 21:57:19,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:19,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22559 transitions. [2022-07-13 21:57:19,986 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) [2022-07-13 21:57:19,998 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) [2022-07-13 21:57:20,000 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) [2022-07-13 21:57:20,000 INFO L186 Difference]: Start difference. First operand has 585 places, 533 transitions, 1295 flow. Second operand 45 states and 22559 transitions. [2022-07-13 21:57:20,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 584 transitions, 1803 flow [2022-07-13 21:57:20,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 584 transitions, 1763 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:57:20,009 INFO L242 Difference]: Finished difference. Result has 632 places, 558 transitions, 1573 flow [2022-07-13 21:57:20,009 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} [2022-07-13 21:57:20,010 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 72 predicate places. [2022-07-13 21:57:20,010 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 558 transitions, 1573 flow [2022-07-13 21:57:20,011 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) [2022-07-13 21:57:20,012 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:20,012 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] [2022-07-13 21:57:20,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:20,230 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 [2022-07-13 21:57:20,231 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1036859799, now seen corresponding path program 1 times [2022-07-13 21:57:20,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:20,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540939444] [2022-07-13 21:57:20,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:20,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:20,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540939444] [2022-07-13 21:57:20,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540939444] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960328720] [2022-07-13 21:57:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:20,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:20,549 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) [2022-07-13 21:57:20,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-13 21:57:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:20,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:57:20,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:20,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:21,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960328720] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:21,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:21,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:57:21,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200843061] [2022-07-13 21:57:21,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:21,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:57:21,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:57:21,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:57:21,496 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-07-13 21:57:21,505 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) [2022-07-13 21:57:21,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:21,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-07-13 21:57:21,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:22,108 INFO L129 PetriNetUnfolder]: 0/650 cut-off events. [2022-07-13 21:57:22,109 INFO L130 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-07-13 21:57:22,109 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. [2022-07-13 21:57:22,110 INFO L132 encePairwiseOnDemand]: 626/631 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-07-13 21:57:22,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 584 transitions, 1967 flow [2022-07-13 21:57:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-13 21:57:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-13 21:57:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27055 transitions. [2022-07-13 21:57:22,132 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940071608851323 [2022-07-13 21:57:22,133 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27055 transitions. [2022-07-13 21:57:22,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27055 transitions. [2022-07-13 21:57:22,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:22,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27055 transitions. [2022-07-13 21:57:22,151 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) [2022-07-13 21:57:22,167 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) [2022-07-13 21:57:22,170 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) [2022-07-13 21:57:22,171 INFO L186 Difference]: Start difference. First operand has 632 places, 558 transitions, 1573 flow. Second operand 54 states and 27055 transitions. [2022-07-13 21:57:22,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 584 transitions, 1967 flow [2022-07-13 21:57:22,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-07-13 21:57:22,180 INFO L242 Difference]: Finished difference. Result has 641 places, 553 transitions, 1559 flow [2022-07-13 21:57:22,180 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} [2022-07-13 21:57:22,181 INFO L279 CegarLoopForPetriNet]: 560 programPoint places, 81 predicate places. [2022-07-13 21:57:22,181 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 553 transitions, 1559 flow [2022-07-13 21:57:22,183 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) [2022-07-13 21:57:22,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:22,184 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] [2022-07-13 21:57:22,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-13 21:57:22,399 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 [2022-07-13 21:57:22,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1484304650, now seen corresponding path program 1 times [2022-07-13 21:57:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:22,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164053980] [2022-07-13 21:57:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:22,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:22,430 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:22,475 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:22,475 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:22,476 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:22,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:22,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-07-13 21:57:22,476 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:57:22,476 WARN L231 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:22,476 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-07-13 21:57:22,505 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:57:22,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 589 places, 664 transitions, 1724 flow [2022-07-13 21:57:22,792 INFO L129 PetriNetUnfolder]: 184/1307 cut-off events. [2022-07-13 21:57:22,792 INFO L130 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-07-13 21:57:22,840 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. [2022-07-13 21:57:22,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 589 places, 664 transitions, 1724 flow [2022-07-13 21:57:22,861 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 664 transitions, 1724 flow [2022-07-13 21:57:22,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:22,862 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:57:22,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:22,865 INFO L129 PetriNetUnfolder]: 4/78 cut-off events. [2022-07-13 21:57:22,865 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:22,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:22,865 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] [2022-07-13 21:57:22,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:22,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1100248866, now seen corresponding path program 1 times [2022-07-13 21:57:22,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:22,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508944164] [2022-07-13 21:57:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:22,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:22,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:22,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508944164] [2022-07-13 21:57:22,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508944164] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:22,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:22,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:22,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634712304] [2022-07-13 21:57:22,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:22,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:22,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:22,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:22,881 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 526 out of 664 [2022-07-13 21:57:22,881 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) [2022-07-13 21:57:22,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:22,881 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 526 of 664 [2022-07-13 21:57:22,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:23,205 INFO L129 PetriNetUnfolder]: 0/1082 cut-off events. [2022-07-13 21:57:23,206 INFO L130 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-07-13 21:57:23,206 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. [2022-07-13 21:57:23,208 INFO L132 encePairwiseOnDemand]: 549/664 looper letters, 27 selfloop transitions, 2 changer transitions 11/555 dead transitions. [2022-07-13 21:57:23,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 555 transitions, 1564 flow [2022-07-13 21:57:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1727 transitions. [2022-07-13 21:57:23,209 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8669678714859438 [2022-07-13 21:57:23,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1727 transitions. [2022-07-13 21:57:23,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1727 transitions. [2022-07-13 21:57:23,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:23,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1727 transitions. [2022-07-13 21:57:23,211 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) [2022-07-13 21:57:23,212 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) [2022-07-13 21:57:23,212 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) [2022-07-13 21:57:23,212 INFO L186 Difference]: Start difference. First operand has 589 places, 664 transitions, 1724 flow. Second operand 3 states and 1727 transitions. [2022-07-13 21:57:23,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 555 transitions, 1564 flow [2022-07-13 21:57:23,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 555 transitions, 1258 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:23,219 INFO L242 Difference]: Finished difference. Result has 591 places, 541 transitions, 1182 flow [2022-07-13 21:57:23,220 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} [2022-07-13 21:57:23,221 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 2 predicate places. [2022-07-13 21:57:23,221 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 541 transitions, 1182 flow [2022-07-13 21:57:23,221 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) [2022-07-13 21:57:23,221 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:23,222 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] [2022-07-13 21:57:23,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-07-13 21:57:23,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash -249523786, now seen corresponding path program 1 times [2022-07-13 21:57:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:23,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246584158] [2022-07-13 21:57:23,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:23,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:23,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246584158] [2022-07-13 21:57:23,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246584158] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:23,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562963815] [2022-07-13 21:57:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:23,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:23,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:23,259 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) [2022-07-13 21:57:23,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-13 21:57:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:23,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:23,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:23,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:23,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562963815] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:23,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:23,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:23,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661468414] [2022-07-13 21:57:23,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:23,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:23,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:23,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:23,617 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-13 21:57:23,619 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) [2022-07-13 21:57:23,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:23,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-13 21:57:23,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:23,938 INFO L129 PetriNetUnfolder]: 0/862 cut-off events. [2022-07-13 21:57:23,938 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-13 21:57:23,939 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. [2022-07-13 21:57:23,940 INFO L132 encePairwiseOnDemand]: 658/664 looper letters, 28 selfloop transitions, 9 changer transitions 0/551 dead transitions. [2022-07-13 21:57:23,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 551 transitions, 1278 flow [2022-07-13 21:57:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:23,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4764 transitions. [2022-07-13 21:57:23,942 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7971887550200804 [2022-07-13 21:57:23,942 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4764 transitions. [2022-07-13 21:57:23,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4764 transitions. [2022-07-13 21:57:23,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:23,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4764 transitions. [2022-07-13 21:57:23,946 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) [2022-07-13 21:57:23,948 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) [2022-07-13 21:57:23,948 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) [2022-07-13 21:57:23,949 INFO L186 Difference]: Start difference. First operand has 591 places, 541 transitions, 1182 flow. Second operand 9 states and 4764 transitions. [2022-07-13 21:57:23,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 551 transitions, 1278 flow [2022-07-13 21:57:23,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 551 transitions, 1276 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:23,954 INFO L242 Difference]: Finished difference. Result has 590 places, 547 transitions, 1230 flow [2022-07-13 21:57:23,955 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} [2022-07-13 21:57:23,955 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 1 predicate places. [2022-07-13 21:57:23,955 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 547 transitions, 1230 flow [2022-07-13 21:57:23,956 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) [2022-07-13 21:57:23,956 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:23,956 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] [2022-07-13 21:57:23,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-13 21:57:24,174 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 [2022-07-13 21:57:24,174 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:24,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash 228153505, now seen corresponding path program 1 times [2022-07-13 21:57:24,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:24,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204122273] [2022-07-13 21:57:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:24,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:24,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204122273] [2022-07-13 21:57:24,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204122273] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:24,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322300244] [2022-07-13 21:57:24,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:24,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:24,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:24,216 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) [2022-07-13 21:57:24,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-13 21:57:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:24,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:24,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:24,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:24,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322300244] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:24,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:24,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:24,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096623723] [2022-07-13 21:57:24,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:24,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:24,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:24,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:24,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:24,603 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-13 21:57:24,605 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) [2022-07-13 21:57:24,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:24,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-13 21:57:24,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:24,946 INFO L129 PetriNetUnfolder]: 0/818 cut-off events. [2022-07-13 21:57:24,946 INFO L130 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-07-13 21:57:24,947 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. [2022-07-13 21:57:24,948 INFO L132 encePairwiseOnDemand]: 658/664 looper letters, 36 selfloop transitions, 21 changer transitions 0/571 dead transitions. [2022-07-13 21:57:24,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 571 transitions, 1452 flow [2022-07-13 21:57:24,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11086 transitions. [2022-07-13 21:57:24,953 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7950372920252439 [2022-07-13 21:57:24,953 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11086 transitions. [2022-07-13 21:57:24,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11086 transitions. [2022-07-13 21:57:24,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:24,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11086 transitions. [2022-07-13 21:57:24,960 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) [2022-07-13 21:57:24,966 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) [2022-07-13 21:57:24,967 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) [2022-07-13 21:57:24,967 INFO L186 Difference]: Start difference. First operand has 590 places, 547 transitions, 1230 flow. Second operand 21 states and 11086 transitions. [2022-07-13 21:57:24,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 571 transitions, 1452 flow [2022-07-13 21:57:24,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 571 transitions, 1438 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:24,974 INFO L242 Difference]: Finished difference. Result has 614 places, 560 transitions, 1354 flow [2022-07-13 21:57:24,974 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} [2022-07-13 21:57:24,975 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 25 predicate places. [2022-07-13 21:57:24,975 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 560 transitions, 1354 flow [2022-07-13 21:57:24,976 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) [2022-07-13 21:57:24,976 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:24,976 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] [2022-07-13 21:57:25,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:25,193 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 [2022-07-13 21:57:25,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1823577469, now seen corresponding path program 1 times [2022-07-13 21:57:25,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:25,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303396339] [2022-07-13 21:57:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:25,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:25,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:25,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303396339] [2022-07-13 21:57:25,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303396339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:25,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989811644] [2022-07-13 21:57:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:25,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:25,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:25,309 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) [2022-07-13 21:57:25,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-13 21:57:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:25,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:25,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:25,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:25,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989811644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:25,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:25,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:25,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486111757] [2022-07-13 21:57:25,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:25,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:25,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:25,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:25,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:25,935 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-13 21:57:25,940 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) [2022-07-13 21:57:25,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:25,940 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-13 21:57:25,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:26,580 INFO L129 PetriNetUnfolder]: 0/730 cut-off events. [2022-07-13 21:57:26,581 INFO L130 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-07-13 21:57:26,581 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. [2022-07-13 21:57:26,582 INFO L132 encePairwiseOnDemand]: 658/664 looper letters, 52 selfloop transitions, 45 changer transitions 0/611 dead transitions. [2022-07-13 21:57:26,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 611 transitions, 1864 flow [2022-07-13 21:57:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:57:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:57:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23730 transitions. [2022-07-13 21:57:26,592 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7941767068273092 [2022-07-13 21:57:26,593 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23730 transitions. [2022-07-13 21:57:26,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23730 transitions. [2022-07-13 21:57:26,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:26,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23730 transitions. [2022-07-13 21:57:26,609 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) [2022-07-13 21:57:26,625 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) [2022-07-13 21:57:26,629 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) [2022-07-13 21:57:26,629 INFO L186 Difference]: Start difference. First operand has 614 places, 560 transitions, 1354 flow. Second operand 45 states and 23730 transitions. [2022-07-13 21:57:26,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 611 transitions, 1864 flow [2022-07-13 21:57:26,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 611 transitions, 1824 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:57:26,639 INFO L242 Difference]: Finished difference. Result has 661 places, 585 transitions, 1632 flow [2022-07-13 21:57:26,640 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} [2022-07-13 21:57:26,640 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 72 predicate places. [2022-07-13 21:57:26,640 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 585 transitions, 1632 flow [2022-07-13 21:57:26,642 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) [2022-07-13 21:57:26,642 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:26,642 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] [2022-07-13 21:57:26,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:26,855 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 [2022-07-13 21:57:26,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash 828442231, now seen corresponding path program 1 times [2022-07-13 21:57:26,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:26,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137529920] [2022-07-13 21:57:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:26,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:27,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:27,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137529920] [2022-07-13 21:57:27,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137529920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:27,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033203981] [2022-07-13 21:57:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:27,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:27,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:27,115 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) [2022-07-13 21:57:27,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-13 21:57:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:57:27,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:27,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:28,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033203981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:28,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:28,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:57:28,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005834693] [2022-07-13 21:57:28,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:28,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:57:28,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:28,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:57:28,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:57:28,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-07-13 21:57:28,310 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) [2022-07-13 21:57:28,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:28,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-07-13 21:57:28,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:29,235 INFO L129 PetriNetUnfolder]: 0/686 cut-off events. [2022-07-13 21:57:29,235 INFO L130 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-07-13 21:57:29,236 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. [2022-07-13 21:57:29,237 INFO L132 encePairwiseOnDemand]: 659/664 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-07-13 21:57:29,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 616 transitions, 2082 flow [2022-07-13 21:57:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-13 21:57:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-07-13 21:57:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30041 transitions. [2022-07-13 21:57:29,255 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7937275417459311 [2022-07-13 21:57:29,256 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30041 transitions. [2022-07-13 21:57:29,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30041 transitions. [2022-07-13 21:57:29,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:29,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30041 transitions. [2022-07-13 21:57:29,278 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) [2022-07-13 21:57:29,300 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) [2022-07-13 21:57:29,307 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) [2022-07-13 21:57:29,308 INFO L186 Difference]: Start difference. First operand has 661 places, 585 transitions, 1632 flow. Second operand 57 states and 30041 transitions. [2022-07-13 21:57:29,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 616 transitions, 2082 flow [2022-07-13 21:57:29,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-07-13 21:57:29,322 INFO L242 Difference]: Finished difference. Result has 673 places, 583 transitions, 1647 flow [2022-07-13 21:57:29,322 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} [2022-07-13 21:57:29,323 INFO L279 CegarLoopForPetriNet]: 589 programPoint places, 84 predicate places. [2022-07-13 21:57:29,323 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 583 transitions, 1647 flow [2022-07-13 21:57:29,327 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) [2022-07-13 21:57:29,327 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:29,327 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] [2022-07-13 21:57:29,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:29,535 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 [2022-07-13 21:57:29,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:29,536 INFO L85 PathProgramCache]: Analyzing trace with hash 444372635, now seen corresponding path program 1 times [2022-07-13 21:57:29,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:29,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593285280] [2022-07-13 21:57:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:29,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:29,569 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:29,606 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:29,607 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:29,607 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:29,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:29,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-07-13 21:57:29,607 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:57:29,607 WARN L231 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:29,608 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-07-13 21:57:29,641 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:57:29,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 618 places, 697 transitions, 1831 flow [2022-07-13 21:57:29,980 INFO L129 PetriNetUnfolder]: 194/1376 cut-off events. [2022-07-13 21:57:29,980 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-13 21:57:30,046 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. [2022-07-13 21:57:30,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 618 places, 697 transitions, 1831 flow [2022-07-13 21:57:30,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 618 places, 697 transitions, 1831 flow [2022-07-13 21:57:30,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:30,073 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:57:30,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:30,076 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-13 21:57:30,076 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:30,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:30,077 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] [2022-07-13 21:57:30,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:30,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1672739810, now seen corresponding path program 1 times [2022-07-13 21:57:30,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:30,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649280518] [2022-07-13 21:57:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:30,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:30,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:30,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649280518] [2022-07-13 21:57:30,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649280518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:30,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:30,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:30,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274427056] [2022-07-13 21:57:30,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:30,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:30,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:30,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:30,093 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 552 out of 697 [2022-07-13 21:57:30,094 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) [2022-07-13 21:57:30,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:30,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 552 of 697 [2022-07-13 21:57:30,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:30,476 INFO L129 PetriNetUnfolder]: 0/1140 cut-off events. [2022-07-13 21:57:30,476 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-13 21:57:30,476 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. [2022-07-13 21:57:30,478 INFO L132 encePairwiseOnDemand]: 576/697 looper letters, 28 selfloop transitions, 2 changer transitions 11/582 dead transitions. [2022-07-13 21:57:30,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 582 transitions, 1661 flow [2022-07-13 21:57:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1812 transitions. [2022-07-13 21:57:30,480 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.866571018651363 [2022-07-13 21:57:30,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1812 transitions. [2022-07-13 21:57:30,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1812 transitions. [2022-07-13 21:57:30,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:30,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1812 transitions. [2022-07-13 21:57:30,481 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) [2022-07-13 21:57:30,482 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) [2022-07-13 21:57:30,483 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) [2022-07-13 21:57:30,483 INFO L186 Difference]: Start difference. First operand has 618 places, 697 transitions, 1831 flow. Second operand 3 states and 1812 transitions. [2022-07-13 21:57:30,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 582 transitions, 1661 flow [2022-07-13 21:57:30,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 582 transitions, 1319 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:30,491 INFO L242 Difference]: Finished difference. Result has 620 places, 568 transitions, 1241 flow [2022-07-13 21:57:30,491 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} [2022-07-13 21:57:30,492 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 2 predicate places. [2022-07-13 21:57:30,492 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 568 transitions, 1241 flow [2022-07-13 21:57:30,492 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) [2022-07-13 21:57:30,492 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:30,492 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] [2022-07-13 21:57:30,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-07-13 21:57:30,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:30,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1470482998, now seen corresponding path program 1 times [2022-07-13 21:57:30,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:30,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630724647] [2022-07-13 21:57:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:30,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:30,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:30,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630724647] [2022-07-13 21:57:30,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630724647] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:30,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496591497] [2022-07-13 21:57:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:30,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:30,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:30,515 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) [2022-07-13 21:57:30,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-13 21:57:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:30,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:30,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:30,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496591497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:30,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:30,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:30,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028368397] [2022-07-13 21:57:30,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:30,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:30,863 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-13 21:57:30,865 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) [2022-07-13 21:57:30,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:30,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-13 21:57:30,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:31,235 INFO L129 PetriNetUnfolder]: 0/909 cut-off events. [2022-07-13 21:57:31,236 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-13 21:57:31,236 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. [2022-07-13 21:57:31,237 INFO L132 encePairwiseOnDemand]: 691/697 looper letters, 29 selfloop transitions, 9 changer transitions 0/578 dead transitions. [2022-07-13 21:57:31,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 578 transitions, 1339 flow [2022-07-13 21:57:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4999 transitions. [2022-07-13 21:57:31,240 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969073808385143 [2022-07-13 21:57:31,240 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4999 transitions. [2022-07-13 21:57:31,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4999 transitions. [2022-07-13 21:57:31,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:31,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4999 transitions. [2022-07-13 21:57:31,244 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) [2022-07-13 21:57:31,246 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) [2022-07-13 21:57:31,247 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) [2022-07-13 21:57:31,247 INFO L186 Difference]: Start difference. First operand has 620 places, 568 transitions, 1241 flow. Second operand 9 states and 4999 transitions. [2022-07-13 21:57:31,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 578 transitions, 1339 flow [2022-07-13 21:57:31,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 578 transitions, 1337 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:31,254 INFO L242 Difference]: Finished difference. Result has 619 places, 574 transitions, 1289 flow [2022-07-13 21:57:31,254 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} [2022-07-13 21:57:31,255 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 1 predicate places. [2022-07-13 21:57:31,255 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 574 transitions, 1289 flow [2022-07-13 21:57:31,255 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) [2022-07-13 21:57:31,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:31,256 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] [2022-07-13 21:57:31,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:31,472 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 [2022-07-13 21:57:31,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:31,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:31,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1494018209, now seen corresponding path program 1 times [2022-07-13 21:57:31,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:31,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153472710] [2022-07-13 21:57:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:31,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:31,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:31,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153472710] [2022-07-13 21:57:31,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153472710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:31,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399494315] [2022-07-13 21:57:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:31,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:31,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:31,548 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) [2022-07-13 21:57:31,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-13 21:57:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:31,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:31,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:31,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:31,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399494315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:31,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:31,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:31,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119823987] [2022-07-13 21:57:31,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:31,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:31,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:31,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:31,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:31,970 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-13 21:57:31,972 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) [2022-07-13 21:57:31,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:31,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-13 21:57:31,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:32,389 INFO L129 PetriNetUnfolder]: 0/865 cut-off events. [2022-07-13 21:57:32,390 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-07-13 21:57:32,390 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. [2022-07-13 21:57:32,391 INFO L132 encePairwiseOnDemand]: 691/697 looper letters, 37 selfloop transitions, 21 changer transitions 0/598 dead transitions. [2022-07-13 21:57:32,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 598 transitions, 1513 flow [2022-07-13 21:57:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11633 transitions. [2022-07-13 21:57:32,396 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.79476668716267 [2022-07-13 21:57:32,397 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11633 transitions. [2022-07-13 21:57:32,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11633 transitions. [2022-07-13 21:57:32,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:32,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11633 transitions. [2022-07-13 21:57:32,405 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) [2022-07-13 21:57:32,412 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) [2022-07-13 21:57:32,441 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) [2022-07-13 21:57:32,442 INFO L186 Difference]: Start difference. First operand has 619 places, 574 transitions, 1289 flow. Second operand 21 states and 11633 transitions. [2022-07-13 21:57:32,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 598 transitions, 1513 flow [2022-07-13 21:57:32,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 598 transitions, 1499 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:32,449 INFO L242 Difference]: Finished difference. Result has 643 places, 587 transitions, 1413 flow [2022-07-13 21:57:32,450 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} [2022-07-13 21:57:32,450 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 25 predicate places. [2022-07-13 21:57:32,450 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 587 transitions, 1413 flow [2022-07-13 21:57:32,451 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) [2022-07-13 21:57:32,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:32,452 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] [2022-07-13 21:57:32,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:32,669 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 [2022-07-13 21:57:32,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash -432379517, now seen corresponding path program 1 times [2022-07-13 21:57:32,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:32,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355265843] [2022-07-13 21:57:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:32,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:32,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:32,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355265843] [2022-07-13 21:57:32,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355265843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:32,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076972613] [2022-07-13 21:57:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:32,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:32,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:32,784 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) [2022-07-13 21:57:32,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-13 21:57:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:33,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:33,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076972613] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:33,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:33,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:33,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415355313] [2022-07-13 21:57:33,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:33,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:33,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:33,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:33,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:33,564 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-13 21:57:33,569 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) [2022-07-13 21:57:33,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:33,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-13 21:57:33,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:34,238 INFO L129 PetriNetUnfolder]: 0/777 cut-off events. [2022-07-13 21:57:34,238 INFO L130 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2022-07-13 21:57:34,239 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. [2022-07-13 21:57:34,240 INFO L132 encePairwiseOnDemand]: 691/697 looper letters, 53 selfloop transitions, 45 changer transitions 0/638 dead transitions. [2022-07-13 21:57:34,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 638 transitions, 1925 flow [2022-07-13 21:57:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:57:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:57:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 24901 transitions. [2022-07-13 21:57:34,256 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7939104096923322 [2022-07-13 21:57:34,256 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 24901 transitions. [2022-07-13 21:57:34,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 24901 transitions. [2022-07-13 21:57:34,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:34,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 24901 transitions. [2022-07-13 21:57:34,273 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) [2022-07-13 21:57:34,289 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) [2022-07-13 21:57:34,292 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) [2022-07-13 21:57:34,293 INFO L186 Difference]: Start difference. First operand has 643 places, 587 transitions, 1413 flow. Second operand 45 states and 24901 transitions. [2022-07-13 21:57:34,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 638 transitions, 1925 flow [2022-07-13 21:57:34,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 638 transitions, 1885 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:57:34,302 INFO L242 Difference]: Finished difference. Result has 690 places, 612 transitions, 1691 flow [2022-07-13 21:57:34,302 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} [2022-07-13 21:57:34,302 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 72 predicate places. [2022-07-13 21:57:34,302 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 612 transitions, 1691 flow [2022-07-13 21:57:34,304 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) [2022-07-13 21:57:34,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:34,304 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] [2022-07-13 21:57:34,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-07-13 21:57:34,523 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 [2022-07-13 21:57:34,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash 439149431, now seen corresponding path program 1 times [2022-07-13 21:57:34,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340582060] [2022-07-13 21:57:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:34,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:34,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340582060] [2022-07-13 21:57:34,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340582060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093965937] [2022-07-13 21:57:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:34,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:34,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:34,783 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) [2022-07-13 21:57:34,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-13 21:57:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:35,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:57:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:35,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:36,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093965937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:36,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:36,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:57:36,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822643155] [2022-07-13 21:57:36,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:36,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:57:36,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:36,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:57:36,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:57:36,144 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-07-13 21:57:36,154 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) [2022-07-13 21:57:36,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:36,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-07-13 21:57:36,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:37,139 INFO L129 PetriNetUnfolder]: 0/722 cut-off events. [2022-07-13 21:57:37,140 INFO L130 PetriNetUnfolder]: For 772/772 co-relation queries the response was YES. [2022-07-13 21:57:37,140 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. [2022-07-13 21:57:37,141 INFO L132 encePairwiseOnDemand]: 692/697 looper letters, 60 selfloop transitions, 58 changer transitions 0/648 dead transitions. [2022-07-13 21:57:37,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 648 transitions, 2197 flow [2022-07-13 21:57:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-13 21:57:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-13 21:57:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 33183 transitions. [2022-07-13 21:57:37,154 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934720229555237 [2022-07-13 21:57:37,154 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 33183 transitions. [2022-07-13 21:57:37,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 33183 transitions. [2022-07-13 21:57:37,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:37,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 33183 transitions. [2022-07-13 21:57:37,177 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) [2022-07-13 21:57:37,198 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) [2022-07-13 21:57:37,203 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) [2022-07-13 21:57:37,204 INFO L186 Difference]: Start difference. First operand has 690 places, 612 transitions, 1691 flow. Second operand 60 states and 33183 transitions. [2022-07-13 21:57:37,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 648 transitions, 2197 flow [2022-07-13 21:57:37,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 648 transitions, 2036 flow, removed 14 selfloop flow, removed 33 redundant places. [2022-07-13 21:57:37,243 INFO L242 Difference]: Finished difference. Result has 705 places, 613 transitions, 1735 flow [2022-07-13 21:57:37,244 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} [2022-07-13 21:57:37,244 INFO L279 CegarLoopForPetriNet]: 618 programPoint places, 87 predicate places. [2022-07-13 21:57:37,244 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 613 transitions, 1735 flow [2022-07-13 21:57:37,248 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) [2022-07-13 21:57:37,248 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:37,248 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] [2022-07-13 21:57:37,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:37,463 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 [2022-07-13 21:57:37,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:37,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:37,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1902582593, now seen corresponding path program 1 times [2022-07-13 21:57:37,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:37,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450732481] [2022-07-13 21:57:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:37,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:37,486 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:37,517 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:37,518 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:37,518 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:37,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:37,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-07-13 21:57:37,518 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:57:37,519 WARN L231 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:37,519 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2022-07-13 21:57:37,551 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:57:37,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 647 places, 730 transitions, 1940 flow [2022-07-13 21:57:37,948 INFO L129 PetriNetUnfolder]: 204/1445 cut-off events. [2022-07-13 21:57:37,948 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-07-13 21:57:38,001 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. [2022-07-13 21:57:38,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 647 places, 730 transitions, 1940 flow [2022-07-13 21:57:38,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 647 places, 730 transitions, 1940 flow [2022-07-13 21:57:38,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:38,025 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:57:38,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:38,028 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2022-07-13 21:57:38,028 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:38,028 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:38,028 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] [2022-07-13 21:57:38,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:38,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:38,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2123599711, now seen corresponding path program 1 times [2022-07-13 21:57:38,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:38,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071653002] [2022-07-13 21:57:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:38,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:38,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:38,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071653002] [2022-07-13 21:57:38,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071653002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:38,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:38,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:38,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886352421] [2022-07-13 21:57:38,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:38,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:38,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:38,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:38,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:38,058 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 585 out of 730 [2022-07-13 21:57:38,058 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) [2022-07-13 21:57:38,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:38,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 585 of 730 [2022-07-13 21:57:38,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:38,415 INFO L129 PetriNetUnfolder]: 0/1220 cut-off events. [2022-07-13 21:57:38,415 INFO L130 PetriNetUnfolder]: For 1730/1730 co-relation queries the response was YES. [2022-07-13 21:57:38,415 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. [2022-07-13 21:57:38,417 INFO L132 encePairwiseOnDemand]: 606/730 looper letters, 20 selfloop transitions, 0 changer transitions 11/605 dead transitions. [2022-07-13 21:57:38,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 605 transitions, 1730 flow [2022-07-13 21:57:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1314 transitions. [2022-07-13 21:57:38,419 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-13 21:57:38,419 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1314 transitions. [2022-07-13 21:57:38,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1314 transitions. [2022-07-13 21:57:38,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:38,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1314 transitions. [2022-07-13 21:57:38,420 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) [2022-07-13 21:57:38,421 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) [2022-07-13 21:57:38,421 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) [2022-07-13 21:57:38,421 INFO L186 Difference]: Start difference. First operand has 647 places, 730 transitions, 1940 flow. Second operand 2 states and 1314 transitions. [2022-07-13 21:57:38,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 605 transitions, 1730 flow [2022-07-13 21:57:38,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 605 transitions, 1350 flow, removed 190 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:38,428 INFO L242 Difference]: Finished difference. Result has 647 places, 594 transitions, 1288 flow [2022-07-13 21:57:38,429 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} [2022-07-13 21:57:38,429 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 0 predicate places. [2022-07-13 21:57:38,429 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 594 transitions, 1288 flow [2022-07-13 21:57:38,429 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) [2022-07-13 21:57:38,429 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:38,429 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] [2022-07-13 21:57:38,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-07-13 21:57:38,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:38,430 INFO L85 PathProgramCache]: Analyzing trace with hash 374416226, now seen corresponding path program 1 times [2022-07-13 21:57:38,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:38,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737566871] [2022-07-13 21:57:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:38,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:38,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:38,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737566871] [2022-07-13 21:57:38,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737566871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:38,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:38,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:38,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698540229] [2022-07-13 21:57:38,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:38,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:38,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:38,445 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 578 out of 730 [2022-07-13 21:57:38,446 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) [2022-07-13 21:57:38,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:38,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 578 of 730 [2022-07-13 21:57:38,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:38,773 INFO L129 PetriNetUnfolder]: 0/978 cut-off events. [2022-07-13 21:57:38,774 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-13 21:57:38,774 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. [2022-07-13 21:57:38,775 INFO L132 encePairwiseOnDemand]: 727/730 looper letters, 29 selfloop transitions, 2 changer transitions 0/598 dead transitions. [2022-07-13 21:57:38,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 598 transitions, 1358 flow [2022-07-13 21:57:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1766 transitions. [2022-07-13 21:57:38,777 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.806392694063927 [2022-07-13 21:57:38,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1766 transitions. [2022-07-13 21:57:38,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1766 transitions. [2022-07-13 21:57:38,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:38,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1766 transitions. [2022-07-13 21:57:38,778 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) [2022-07-13 21:57:38,779 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) [2022-07-13 21:57:38,780 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) [2022-07-13 21:57:38,780 INFO L186 Difference]: Start difference. First operand has 647 places, 594 transitions, 1288 flow. Second operand 3 states and 1766 transitions. [2022-07-13 21:57:38,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 598 transitions, 1358 flow [2022-07-13 21:57:38,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 598 transitions, 1358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:38,790 INFO L242 Difference]: Finished difference. Result has 639 places, 595 transitions, 1300 flow [2022-07-13 21:57:38,791 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} [2022-07-13 21:57:38,791 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, -8 predicate places. [2022-07-13 21:57:38,791 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 595 transitions, 1300 flow [2022-07-13 21:57:38,792 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) [2022-07-13 21:57:38,792 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:38,792 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] [2022-07-13 21:57:38,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-07-13 21:57:38,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:38,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:38,792 INFO L85 PathProgramCache]: Analyzing trace with hash 87751190, now seen corresponding path program 1 times [2022-07-13 21:57:38,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:38,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567377929] [2022-07-13 21:57:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:38,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:38,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:38,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567377929] [2022-07-13 21:57:38,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567377929] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:38,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651093350] [2022-07-13 21:57:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:38,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:38,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:38,819 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) [2022-07-13 21:57:38,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-13 21:57:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:39,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:39,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:39,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:39,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651093350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:39,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:39,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:39,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629869195] [2022-07-13 21:57:39,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:39,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:39,216 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-13 21:57:39,218 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) [2022-07-13 21:57:39,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:39,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-13 21:57:39,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:39,601 INFO L129 PetriNetUnfolder]: 0/956 cut-off events. [2022-07-13 21:57:39,601 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-13 21:57:39,602 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. [2022-07-13 21:57:39,604 INFO L132 encePairwiseOnDemand]: 724/730 looper letters, 30 selfloop transitions, 9 changer transitions 0/605 dead transitions. [2022-07-13 21:57:39,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 605 transitions, 1400 flow [2022-07-13 21:57:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5234 transitions. [2022-07-13 21:57:39,606 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7966514459665145 [2022-07-13 21:57:39,606 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5234 transitions. [2022-07-13 21:57:39,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5234 transitions. [2022-07-13 21:57:39,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:39,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5234 transitions. [2022-07-13 21:57:39,610 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) [2022-07-13 21:57:39,613 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) [2022-07-13 21:57:39,613 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) [2022-07-13 21:57:39,613 INFO L186 Difference]: Start difference. First operand has 639 places, 595 transitions, 1300 flow. Second operand 9 states and 5234 transitions. [2022-07-13 21:57:39,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 605 transitions, 1400 flow [2022-07-13 21:57:39,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 605 transitions, 1398 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:39,620 INFO L242 Difference]: Finished difference. Result has 649 places, 601 transitions, 1348 flow [2022-07-13 21:57:39,621 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} [2022-07-13 21:57:39,621 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 2 predicate places. [2022-07-13 21:57:39,621 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 601 transitions, 1348 flow [2022-07-13 21:57:39,622 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) [2022-07-13 21:57:39,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:39,622 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] [2022-07-13 21:57:39,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:39,834 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 [2022-07-13 21:57:39,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:39,835 INFO L85 PathProgramCache]: Analyzing trace with hash -151830207, now seen corresponding path program 1 times [2022-07-13 21:57:39,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:39,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003808307] [2022-07-13 21:57:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:39,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:39,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:39,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003808307] [2022-07-13 21:57:39,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003808307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:39,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524789823] [2022-07-13 21:57:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:39,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:39,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:39,876 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) [2022-07-13 21:57:39,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-13 21:57:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:40,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:40,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:40,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524789823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:40,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:40,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:40,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578267939] [2022-07-13 21:57:40,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:40,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:40,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:40,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:40,349 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-13 21:57:40,352 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) [2022-07-13 21:57:40,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:40,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-13 21:57:40,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:40,845 INFO L129 PetriNetUnfolder]: 0/912 cut-off events. [2022-07-13 21:57:40,846 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-13 21:57:40,846 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. [2022-07-13 21:57:40,847 INFO L132 encePairwiseOnDemand]: 724/730 looper letters, 38 selfloop transitions, 21 changer transitions 0/625 dead transitions. [2022-07-13 21:57:40,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 625 transitions, 1574 flow [2022-07-13 21:57:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12180 transitions. [2022-07-13 21:57:40,854 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945205479452054 [2022-07-13 21:57:40,854 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12180 transitions. [2022-07-13 21:57:40,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12180 transitions. [2022-07-13 21:57:40,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:40,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12180 transitions. [2022-07-13 21:57:40,865 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) [2022-07-13 21:57:40,873 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) [2022-07-13 21:57:40,874 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) [2022-07-13 21:57:40,874 INFO L186 Difference]: Start difference. First operand has 649 places, 601 transitions, 1348 flow. Second operand 21 states and 12180 transitions. [2022-07-13 21:57:40,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 625 transitions, 1574 flow [2022-07-13 21:57:40,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 625 transitions, 1560 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:40,881 INFO L242 Difference]: Finished difference. Result has 673 places, 614 transitions, 1472 flow [2022-07-13 21:57:40,882 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} [2022-07-13 21:57:40,882 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 26 predicate places. [2022-07-13 21:57:40,882 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 614 transitions, 1472 flow [2022-07-13 21:57:40,883 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) [2022-07-13 21:57:40,883 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:40,883 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] [2022-07-13 21:57:40,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:41,101 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 [2022-07-13 21:57:41,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:41,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:41,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2060487773, now seen corresponding path program 1 times [2022-07-13 21:57:41,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:41,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509371069] [2022-07-13 21:57:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:41,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:41,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:41,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509371069] [2022-07-13 21:57:41,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509371069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:41,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335101395] [2022-07-13 21:57:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:41,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:41,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:41,245 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) [2022-07-13 21:57:41,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-13 21:57:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:41,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:41,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:41,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:41,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335101395] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:41,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:41,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:41,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454246090] [2022-07-13 21:57:41,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:41,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:41,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:41,926 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-13 21:57:41,934 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) [2022-07-13 21:57:41,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:41,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-13 21:57:41,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:42,479 INFO L129 PetriNetUnfolder]: 0/824 cut-off events. [2022-07-13 21:57:42,479 INFO L130 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2022-07-13 21:57:42,480 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. [2022-07-13 21:57:42,481 INFO L132 encePairwiseOnDemand]: 724/730 looper letters, 54 selfloop transitions, 45 changer transitions 0/665 dead transitions. [2022-07-13 21:57:42,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 665 transitions, 1986 flow [2022-07-13 21:57:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:57:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:57:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 26072 transitions. [2022-07-13 21:57:42,491 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7936681887366819 [2022-07-13 21:57:42,491 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 26072 transitions. [2022-07-13 21:57:42,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 26072 transitions. [2022-07-13 21:57:42,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:42,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 26072 transitions. [2022-07-13 21:57:42,508 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) [2022-07-13 21:57:42,522 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) [2022-07-13 21:57:42,524 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) [2022-07-13 21:57:42,525 INFO L186 Difference]: Start difference. First operand has 673 places, 614 transitions, 1472 flow. Second operand 45 states and 26072 transitions. [2022-07-13 21:57:42,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 665 transitions, 1986 flow [2022-07-13 21:57:42,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 665 transitions, 1946 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:57:42,533 INFO L242 Difference]: Finished difference. Result has 720 places, 639 transitions, 1750 flow [2022-07-13 21:57:42,534 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} [2022-07-13 21:57:42,534 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 73 predicate places. [2022-07-13 21:57:42,534 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 639 transitions, 1750 flow [2022-07-13 21:57:42,536 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) [2022-07-13 21:57:42,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:42,536 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] [2022-07-13 21:57:42,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:42,754 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 [2022-07-13 21:57:42,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:42,755 INFO L85 PathProgramCache]: Analyzing trace with hash -131018601, now seen corresponding path program 1 times [2022-07-13 21:57:42,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:42,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713850296] [2022-07-13 21:57:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:42,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:43,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713850296] [2022-07-13 21:57:43,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713850296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:43,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905402283] [2022-07-13 21:57:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:43,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:43,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:43,136 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) [2022-07-13 21:57:43,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-13 21:57:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:43,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:57:43,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:43,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:44,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905402283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:44,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:44,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:57:44,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104975630] [2022-07-13 21:57:44,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:44,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:57:44,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:44,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:57:44,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:57:44,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 577 out of 730 [2022-07-13 21:57:44,373 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) [2022-07-13 21:57:44,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:44,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 577 of 730 [2022-07-13 21:57:44,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:45,420 INFO L129 PetriNetUnfolder]: 0/758 cut-off events. [2022-07-13 21:57:45,420 INFO L130 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2022-07-13 21:57:45,421 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. [2022-07-13 21:57:45,422 INFO L132 encePairwiseOnDemand]: 725/730 looper letters, 63 selfloop transitions, 61 changer transitions 0/680 dead transitions. [2022-07-13 21:57:45,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 680 transitions, 2312 flow [2022-07-13 21:57:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-13 21:57:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-13 21:57:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 36481 transitions. [2022-07-13 21:57:45,435 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.793237660360948 [2022-07-13 21:57:45,435 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 36481 transitions. [2022-07-13 21:57:45,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 36481 transitions. [2022-07-13 21:57:45,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:45,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 36481 transitions. [2022-07-13 21:57:45,459 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) [2022-07-13 21:57:45,483 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) [2022-07-13 21:57:45,490 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) [2022-07-13 21:57:45,490 INFO L186 Difference]: Start difference. First operand has 720 places, 639 transitions, 1750 flow. Second operand 63 states and 36481 transitions. [2022-07-13 21:57:45,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 680 transitions, 2312 flow [2022-07-13 21:57:45,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 680 transitions, 2143 flow, removed 15 selfloop flow, removed 33 redundant places. [2022-07-13 21:57:45,500 INFO L242 Difference]: Finished difference. Result has 738 places, 643 transitions, 1823 flow [2022-07-13 21:57:45,501 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} [2022-07-13 21:57:45,501 INFO L279 CegarLoopForPetriNet]: 647 programPoint places, 91 predicate places. [2022-07-13 21:57:45,501 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 643 transitions, 1823 flow [2022-07-13 21:57:45,504 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) [2022-07-13 21:57:45,505 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:45,505 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] [2022-07-13 21:57:45,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-13 21:57:45,719 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 [2022-07-13 21:57:45,719 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash -988310136, now seen corresponding path program 1 times [2022-07-13 21:57:45,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:45,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565549497] [2022-07-13 21:57:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:45,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:45,745 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:45,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:45,778 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:45,778 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:45,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:45,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-07-13 21:57:45,779 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:45,779 WARN L231 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:45,779 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2022-07-13 21:57:45,816 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:57:45,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 676 places, 763 transitions, 2051 flow [2022-07-13 21:57:46,205 INFO L129 PetriNetUnfolder]: 214/1514 cut-off events. [2022-07-13 21:57:46,206 INFO L130 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-07-13 21:57:46,279 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. [2022-07-13 21:57:46,279 INFO L82 GeneralOperation]: Start removeDead. Operand has 676 places, 763 transitions, 2051 flow [2022-07-13 21:57:46,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 676 places, 763 transitions, 2051 flow [2022-07-13 21:57:46,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:46,311 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:57:46,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:46,314 INFO L129 PetriNetUnfolder]: 5/77 cut-off events. [2022-07-13 21:57:46,314 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:46,314 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:46,314 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] [2022-07-13 21:57:46,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:46,315 INFO L85 PathProgramCache]: Analyzing trace with hash -997770527, now seen corresponding path program 1 times [2022-07-13 21:57:46,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:46,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62658229] [2022-07-13 21:57:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:46,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:46,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62658229] [2022-07-13 21:57:46,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62658229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:46,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:46,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:46,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538002880] [2022-07-13 21:57:46,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:46,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:46,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:46,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:46,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:46,329 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 611 out of 763 [2022-07-13 21:57:46,329 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) [2022-07-13 21:57:46,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:46,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 611 of 763 [2022-07-13 21:57:46,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:46,729 INFO L129 PetriNetUnfolder]: 0/1278 cut-off events. [2022-07-13 21:57:46,729 INFO L130 PetriNetUnfolder]: For 1981/1981 co-relation queries the response was YES. [2022-07-13 21:57:46,729 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. [2022-07-13 21:57:46,731 INFO L132 encePairwiseOnDemand]: 633/763 looper letters, 21 selfloop transitions, 0 changer transitions 11/632 dead transitions. [2022-07-13 21:57:46,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 632 transitions, 1831 flow [2022-07-13 21:57:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:46,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1373 transitions. [2022-07-13 21:57:46,732 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8997378768020969 [2022-07-13 21:57:46,733 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1373 transitions. [2022-07-13 21:57:46,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1373 transitions. [2022-07-13 21:57:46,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:46,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1373 transitions. [2022-07-13 21:57:46,734 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) [2022-07-13 21:57:46,734 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) [2022-07-13 21:57:46,735 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) [2022-07-13 21:57:46,735 INFO L186 Difference]: Start difference. First operand has 676 places, 763 transitions, 2051 flow. Second operand 2 states and 1373 transitions. [2022-07-13 21:57:46,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 632 transitions, 1831 flow [2022-07-13 21:57:46,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 632 transitions, 1411 flow, removed 210 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:46,742 INFO L242 Difference]: Finished difference. Result has 676 places, 621 transitions, 1347 flow [2022-07-13 21:57:46,743 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} [2022-07-13 21:57:46,743 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 0 predicate places. [2022-07-13 21:57:46,743 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 621 transitions, 1347 flow [2022-07-13 21:57:46,743 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) [2022-07-13 21:57:46,743 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:46,743 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:46,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-07-13 21:57:46,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1500245410, now seen corresponding path program 1 times [2022-07-13 21:57:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:46,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628572157] [2022-07-13 21:57:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:46,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:46,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628572157] [2022-07-13 21:57:46,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628572157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:46,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:46,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:46,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598889258] [2022-07-13 21:57:46,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:46,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:46,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:46,761 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 604 out of 763 [2022-07-13 21:57:46,761 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) [2022-07-13 21:57:46,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:46,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 604 of 763 [2022-07-13 21:57:46,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:47,100 INFO L129 PetriNetUnfolder]: 0/1025 cut-off events. [2022-07-13 21:57:47,101 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-13 21:57:47,101 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. [2022-07-13 21:57:47,103 INFO L132 encePairwiseOnDemand]: 760/763 looper letters, 30 selfloop transitions, 2 changer transitions 0/625 dead transitions. [2022-07-13 21:57:47,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 625 transitions, 1419 flow [2022-07-13 21:57:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1845 transitions. [2022-07-13 21:57:47,104 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8060288335517694 [2022-07-13 21:57:47,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1845 transitions. [2022-07-13 21:57:47,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1845 transitions. [2022-07-13 21:57:47,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:47,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1845 transitions. [2022-07-13 21:57:47,106 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) [2022-07-13 21:57:47,107 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) [2022-07-13 21:57:47,107 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) [2022-07-13 21:57:47,107 INFO L186 Difference]: Start difference. First operand has 676 places, 621 transitions, 1347 flow. Second operand 3 states and 1845 transitions. [2022-07-13 21:57:47,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 625 transitions, 1419 flow [2022-07-13 21:57:47,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 625 transitions, 1419 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:47,114 INFO L242 Difference]: Finished difference. Result has 668 places, 622 transitions, 1359 flow [2022-07-13 21:57:47,114 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} [2022-07-13 21:57:47,114 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, -8 predicate places. [2022-07-13 21:57:47,115 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 622 transitions, 1359 flow [2022-07-13 21:57:47,115 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) [2022-07-13 21:57:47,115 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:47,115 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] [2022-07-13 21:57:47,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-07-13 21:57:47,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash -102751914, now seen corresponding path program 1 times [2022-07-13 21:57:47,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:47,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595594844] [2022-07-13 21:57:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:47,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:47,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:47,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595594844] [2022-07-13 21:57:47,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595594844] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:47,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771115746] [2022-07-13 21:57:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:47,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:47,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:47,137 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) [2022-07-13 21:57:47,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-13 21:57:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:47,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:47,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:47,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:47,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771115746] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:47,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:47,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:47,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545268444] [2022-07-13 21:57:47,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:47,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:47,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:47,593 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-13 21:57:47,595 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) [2022-07-13 21:57:47,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:47,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-13 21:57:47,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:48,019 INFO L129 PetriNetUnfolder]: 0/1003 cut-off events. [2022-07-13 21:57:48,019 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-13 21:57:48,019 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. [2022-07-13 21:57:48,021 INFO L132 encePairwiseOnDemand]: 757/763 looper letters, 31 selfloop transitions, 9 changer transitions 0/632 dead transitions. [2022-07-13 21:57:48,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 632 transitions, 1461 flow [2022-07-13 21:57:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5469 transitions. [2022-07-13 21:57:48,023 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7964176496286588 [2022-07-13 21:57:48,023 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5469 transitions. [2022-07-13 21:57:48,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5469 transitions. [2022-07-13 21:57:48,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:48,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5469 transitions. [2022-07-13 21:57:48,027 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) [2022-07-13 21:57:48,030 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) [2022-07-13 21:57:48,030 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) [2022-07-13 21:57:48,030 INFO L186 Difference]: Start difference. First operand has 668 places, 622 transitions, 1359 flow. Second operand 9 states and 5469 transitions. [2022-07-13 21:57:48,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 632 transitions, 1461 flow [2022-07-13 21:57:48,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 632 transitions, 1459 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:48,036 INFO L242 Difference]: Finished difference. Result has 678 places, 628 transitions, 1407 flow [2022-07-13 21:57:48,037 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} [2022-07-13 21:57:48,037 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 2 predicate places. [2022-07-13 21:57:48,037 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 628 transitions, 1407 flow [2022-07-13 21:57:48,038 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) [2022-07-13 21:57:48,038 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:48,038 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] [2022-07-13 21:57:48,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:48,251 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 [2022-07-13 21:57:48,251 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash -414424447, now seen corresponding path program 1 times [2022-07-13 21:57:48,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:48,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11432553] [2022-07-13 21:57:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:48,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:48,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11432553] [2022-07-13 21:57:48,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11432553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:48,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405795460] [2022-07-13 21:57:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:48,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:48,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:48,290 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) [2022-07-13 21:57:48,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-13 21:57:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:48,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:48,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:48,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405795460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:48,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:48,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:48,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269594579] [2022-07-13 21:57:48,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:48,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:48,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:48,778 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-13 21:57:48,780 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) [2022-07-13 21:57:48,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:48,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-13 21:57:48,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:49,283 INFO L129 PetriNetUnfolder]: 0/959 cut-off events. [2022-07-13 21:57:49,283 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-07-13 21:57:49,284 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. [2022-07-13 21:57:49,285 INFO L132 encePairwiseOnDemand]: 757/763 looper letters, 39 selfloop transitions, 21 changer transitions 0/652 dead transitions. [2022-07-13 21:57:49,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 652 transitions, 1635 flow [2022-07-13 21:57:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12727 transitions. [2022-07-13 21:57:49,290 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7942956999313486 [2022-07-13 21:57:49,291 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12727 transitions. [2022-07-13 21:57:49,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12727 transitions. [2022-07-13 21:57:49,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:49,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12727 transitions. [2022-07-13 21:57:49,299 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) [2022-07-13 21:57:49,306 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) [2022-07-13 21:57:49,307 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) [2022-07-13 21:57:49,307 INFO L186 Difference]: Start difference. First operand has 678 places, 628 transitions, 1407 flow. Second operand 21 states and 12727 transitions. [2022-07-13 21:57:49,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 652 transitions, 1635 flow [2022-07-13 21:57:49,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 652 transitions, 1621 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:49,315 INFO L242 Difference]: Finished difference. Result has 702 places, 641 transitions, 1531 flow [2022-07-13 21:57:49,315 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} [2022-07-13 21:57:49,315 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 26 predicate places. [2022-07-13 21:57:49,315 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 641 transitions, 1531 flow [2022-07-13 21:57:49,316 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) [2022-07-13 21:57:49,316 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:49,317 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] [2022-07-13 21:57:49,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:49,535 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 [2022-07-13 21:57:49,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:49,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1882032355, now seen corresponding path program 1 times [2022-07-13 21:57:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:49,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072448151] [2022-07-13 21:57:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:49,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:49,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072448151] [2022-07-13 21:57:49,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072448151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:49,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820206064] [2022-07-13 21:57:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:49,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:49,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:49,637 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) [2022-07-13 21:57:49,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-13 21:57:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:50,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:50,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:50,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:50,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820206064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:50,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:50,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:50,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329849201] [2022-07-13 21:57:50,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:50,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:50,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:50,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:50,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:50,320 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-13 21:57:50,326 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) [2022-07-13 21:57:50,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:50,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-13 21:57:50,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:51,143 INFO L129 PetriNetUnfolder]: 0/871 cut-off events. [2022-07-13 21:57:51,143 INFO L130 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2022-07-13 21:57:51,144 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. [2022-07-13 21:57:51,145 INFO L132 encePairwiseOnDemand]: 757/763 looper letters, 55 selfloop transitions, 45 changer transitions 0/692 dead transitions. [2022-07-13 21:57:51,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 692 transitions, 2047 flow [2022-07-13 21:57:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:57:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:57:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 27243 transitions. [2022-07-13 21:57:51,159 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934469200524247 [2022-07-13 21:57:51,159 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 27243 transitions. [2022-07-13 21:57:51,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 27243 transitions. [2022-07-13 21:57:51,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:51,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 27243 transitions. [2022-07-13 21:57:51,184 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) [2022-07-13 21:57:51,203 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) [2022-07-13 21:57:51,206 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) [2022-07-13 21:57:51,207 INFO L186 Difference]: Start difference. First operand has 702 places, 641 transitions, 1531 flow. Second operand 45 states and 27243 transitions. [2022-07-13 21:57:51,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 692 transitions, 2047 flow [2022-07-13 21:57:51,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 692 transitions, 2007 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:57:51,215 INFO L242 Difference]: Finished difference. Result has 749 places, 666 transitions, 1809 flow [2022-07-13 21:57:51,215 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} [2022-07-13 21:57:51,216 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 73 predicate places. [2022-07-13 21:57:51,216 INFO L495 AbstractCegarLoop]: Abstraction has has 749 places, 666 transitions, 1809 flow [2022-07-13 21:57:51,218 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) [2022-07-13 21:57:51,218 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:51,218 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] [2022-07-13 21:57:51,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-07-13 21:57:51,422 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 [2022-07-13 21:57:51,422 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash -882061865, now seen corresponding path program 1 times [2022-07-13 21:57:51,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:51,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204659489] [2022-07-13 21:57:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:51,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:51,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:51,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204659489] [2022-07-13 21:57:51,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204659489] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:51,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922673668] [2022-07-13 21:57:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:51,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:51,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:51,750 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) [2022-07-13 21:57:51,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-13 21:57:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:52,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:57:52,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:52,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:52,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922673668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:52,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:52,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:57:52,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28787509] [2022-07-13 21:57:52,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:52,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:57:52,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:52,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:57:52,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:57:52,937 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 603 out of 763 [2022-07-13 21:57:52,947 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) [2022-07-13 21:57:52,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:52,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 603 of 763 [2022-07-13 21:57:52,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:53,763 INFO L129 PetriNetUnfolder]: 0/794 cut-off events. [2022-07-13 21:57:53,763 INFO L130 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2022-07-13 21:57:53,764 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. [2022-07-13 21:57:53,765 INFO L132 encePairwiseOnDemand]: 758/763 looper letters, 66 selfloop transitions, 64 changer transitions 0/712 dead transitions. [2022-07-13 21:57:53,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 712 transitions, 2427 flow [2022-07-13 21:57:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-13 21:57:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-13 21:57:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 39935 transitions. [2022-07-13 21:57:53,780 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930219627467334 [2022-07-13 21:57:53,781 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 39935 transitions. [2022-07-13 21:57:53,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 39935 transitions. [2022-07-13 21:57:53,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:53,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 39935 transitions. [2022-07-13 21:57:53,807 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) [2022-07-13 21:57:53,832 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) [2022-07-13 21:57:53,839 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) [2022-07-13 21:57:53,839 INFO L186 Difference]: Start difference. First operand has 749 places, 666 transitions, 1809 flow. Second operand 66 states and 39935 transitions. [2022-07-13 21:57:53,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 712 transitions, 2427 flow [2022-07-13 21:57:53,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 712 transitions, 2250 flow, removed 16 selfloop flow, removed 33 redundant places. [2022-07-13 21:57:53,849 INFO L242 Difference]: Finished difference. Result has 770 places, 673 transitions, 1911 flow [2022-07-13 21:57:53,850 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} [2022-07-13 21:57:53,850 INFO L279 CegarLoopForPetriNet]: 676 programPoint places, 94 predicate places. [2022-07-13 21:57:53,850 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 673 transitions, 1911 flow [2022-07-13 21:57:53,853 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) [2022-07-13 21:57:53,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:53,854 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] [2022-07-13 21:57:53,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:54,072 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 [2022-07-13 21:57:54,072 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1428775408, now seen corresponding path program 1 times [2022-07-13 21:57:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:54,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704233730] [2022-07-13 21:57:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:54,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:54,095 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:54,136 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:54,137 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:54,137 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:54,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:54,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-07-13 21:57:54,137 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:54,138 WARN L231 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:54,138 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2022-07-13 21:57:54,172 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:57:54,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 705 places, 796 transitions, 2164 flow [2022-07-13 21:57:54,621 INFO L129 PetriNetUnfolder]: 224/1583 cut-off events. [2022-07-13 21:57:54,621 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-13 21:57:54,691 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. [2022-07-13 21:57:54,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 705 places, 796 transitions, 2164 flow [2022-07-13 21:57:54,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 705 places, 796 transitions, 2164 flow [2022-07-13 21:57:54,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:54,721 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:57:54,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:54,724 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2022-07-13 21:57:54,724 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:54,724 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:54,724 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] [2022-07-13 21:57:54,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash 755260066, now seen corresponding path program 1 times [2022-07-13 21:57:54,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:54,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362599398] [2022-07-13 21:57:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:54,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:54,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:54,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362599398] [2022-07-13 21:57:54,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362599398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:54,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:54,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:54,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501592608] [2022-07-13 21:57:54,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:54,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:54,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:54,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:54,741 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 630 out of 796 [2022-07-13 21:57:54,741 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) [2022-07-13 21:57:54,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:54,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 630 of 796 [2022-07-13 21:57:54,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:55,248 INFO L129 PetriNetUnfolder]: 0/1314 cut-off events. [2022-07-13 21:57:55,249 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-13 21:57:55,249 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. [2022-07-13 21:57:55,251 INFO L132 encePairwiseOnDemand]: 657/796 looper letters, 31 selfloop transitions, 2 changer transitions 11/663 dead transitions. [2022-07-13 21:57:55,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 663 transitions, 1964 flow [2022-07-13 21:57:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2067 transitions. [2022-07-13 21:57:55,253 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8655778894472361 [2022-07-13 21:57:55,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2067 transitions. [2022-07-13 21:57:55,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2067 transitions. [2022-07-13 21:57:55,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:55,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2067 transitions. [2022-07-13 21:57:55,255 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) [2022-07-13 21:57:55,256 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) [2022-07-13 21:57:55,256 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) [2022-07-13 21:57:55,256 INFO L186 Difference]: Start difference. First operand has 705 places, 796 transitions, 2164 flow. Second operand 3 states and 2067 transitions. [2022-07-13 21:57:55,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 663 transitions, 1964 flow [2022-07-13 21:57:55,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 663 transitions, 1502 flow, removed 231 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:55,265 INFO L242 Difference]: Finished difference. Result has 707 places, 649 transitions, 1418 flow [2022-07-13 21:57:55,266 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} [2022-07-13 21:57:55,266 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 2 predicate places. [2022-07-13 21:57:55,266 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 649 transitions, 1418 flow [2022-07-13 21:57:55,266 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) [2022-07-13 21:57:55,267 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:55,267 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] [2022-07-13 21:57:55,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-07-13 21:57:55,267 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash 898973686, now seen corresponding path program 1 times [2022-07-13 21:57:55,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:55,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888469677] [2022-07-13 21:57:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:55,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:55,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:55,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888469677] [2022-07-13 21:57:55,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888469677] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:55,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115734727] [2022-07-13 21:57:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:55,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:55,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:55,293 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) [2022-07-13 21:57:55,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-13 21:57:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:55,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:55,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:55,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:55,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115734727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:55,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:55,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626469673] [2022-07-13 21:57:55,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:55,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:55,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:55,744 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-13 21:57:55,746 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) [2022-07-13 21:57:55,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:55,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-13 21:57:55,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:56,172 INFO L129 PetriNetUnfolder]: 0/1050 cut-off events. [2022-07-13 21:57:56,172 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-13 21:57:56,172 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. [2022-07-13 21:57:56,174 INFO L132 encePairwiseOnDemand]: 790/796 looper letters, 32 selfloop transitions, 9 changer transitions 0/659 dead transitions. [2022-07-13 21:57:56,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 659 transitions, 1522 flow [2022-07-13 21:57:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5704 transitions. [2022-07-13 21:57:56,177 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7962032384142937 [2022-07-13 21:57:56,177 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5704 transitions. [2022-07-13 21:57:56,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5704 transitions. [2022-07-13 21:57:56,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:56,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5704 transitions. [2022-07-13 21:57:56,181 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) [2022-07-13 21:57:56,184 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) [2022-07-13 21:57:56,185 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) [2022-07-13 21:57:56,185 INFO L186 Difference]: Start difference. First operand has 707 places, 649 transitions, 1418 flow. Second operand 9 states and 5704 transitions. [2022-07-13 21:57:56,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 659 transitions, 1522 flow [2022-07-13 21:57:56,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 659 transitions, 1520 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:56,193 INFO L242 Difference]: Finished difference. Result has 706 places, 655 transitions, 1466 flow [2022-07-13 21:57:56,193 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} [2022-07-13 21:57:56,193 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 1 predicate places. [2022-07-13 21:57:56,193 INFO L495 AbstractCegarLoop]: Abstraction has has 706 places, 655 transitions, 1466 flow [2022-07-13 21:57:56,194 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) [2022-07-13 21:57:56,194 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:56,194 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] [2022-07-13 21:57:56,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:56,412 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 [2022-07-13 21:57:56,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash 706235489, now seen corresponding path program 1 times [2022-07-13 21:57:56,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:56,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17659877] [2022-07-13 21:57:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:56,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:56,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:56,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17659877] [2022-07-13 21:57:56,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17659877] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:56,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338541945] [2022-07-13 21:57:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:56,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:56,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:56,453 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) [2022-07-13 21:57:56,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-13 21:57:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:56,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:56,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:56,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:56,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338541945] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:56,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:56,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:56,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016360396] [2022-07-13 21:57:56,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:56,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:56,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:56,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:56,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:56,992 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-13 21:57:56,995 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) [2022-07-13 21:57:56,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:56,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-13 21:57:56,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:57,524 INFO L129 PetriNetUnfolder]: 0/1006 cut-off events. [2022-07-13 21:57:57,525 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-07-13 21:57:57,525 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. [2022-07-13 21:57:57,527 INFO L132 encePairwiseOnDemand]: 790/796 looper letters, 40 selfloop transitions, 21 changer transitions 0/679 dead transitions. [2022-07-13 21:57:57,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 679 transitions, 1696 flow [2022-07-13 21:57:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:57,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13274 transitions. [2022-07-13 21:57:57,533 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940894950945202 [2022-07-13 21:57:57,533 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13274 transitions. [2022-07-13 21:57:57,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13274 transitions. [2022-07-13 21:57:57,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:57,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13274 transitions. [2022-07-13 21:57:57,541 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) [2022-07-13 21:57:57,548 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) [2022-07-13 21:57:57,549 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) [2022-07-13 21:57:57,550 INFO L186 Difference]: Start difference. First operand has 706 places, 655 transitions, 1466 flow. Second operand 21 states and 13274 transitions. [2022-07-13 21:57:57,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 679 transitions, 1696 flow [2022-07-13 21:57:57,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 679 transitions, 1682 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:57,558 INFO L242 Difference]: Finished difference. Result has 730 places, 668 transitions, 1590 flow [2022-07-13 21:57:57,558 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} [2022-07-13 21:57:57,559 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 25 predicate places. [2022-07-13 21:57:57,559 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 668 transitions, 1590 flow [2022-07-13 21:57:57,560 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) [2022-07-13 21:57:57,560 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:57,560 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] [2022-07-13 21:57:57,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:57,775 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 [2022-07-13 21:57:57,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1489721021, now seen corresponding path program 1 times [2022-07-13 21:57:57,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:57,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362315195] [2022-07-13 21:57:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:57,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:57,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:57,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362315195] [2022-07-13 21:57:57,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362315195] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:57,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38959630] [2022-07-13 21:57:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:57,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:57,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:57,913 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) [2022-07-13 21:57:57,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-13 21:57:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:58,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:57:58,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:58,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:58,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38959630] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:58,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:58,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:57:58,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610314219] [2022-07-13 21:57:58,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:58,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:57:58,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:58,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:57:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:57:58,646 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-13 21:57:58,652 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) [2022-07-13 21:57:58,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:58,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-13 21:57:58,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:59,406 INFO L129 PetriNetUnfolder]: 0/918 cut-off events. [2022-07-13 21:57:59,406 INFO L130 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-07-13 21:57:59,407 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. [2022-07-13 21:57:59,408 INFO L132 encePairwiseOnDemand]: 790/796 looper letters, 56 selfloop transitions, 45 changer transitions 0/719 dead transitions. [2022-07-13 21:57:59,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 719 transitions, 2108 flow [2022-07-13 21:57:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:57:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:57:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 28414 transitions. [2022-07-13 21:57:59,484 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932439977666108 [2022-07-13 21:57:59,484 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 28414 transitions. [2022-07-13 21:57:59,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 28414 transitions. [2022-07-13 21:57:59,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:59,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 28414 transitions. [2022-07-13 21:57:59,503 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) [2022-07-13 21:57:59,521 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) [2022-07-13 21:57:59,524 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) [2022-07-13 21:57:59,525 INFO L186 Difference]: Start difference. First operand has 730 places, 668 transitions, 1590 flow. Second operand 45 states and 28414 transitions. [2022-07-13 21:57:59,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 719 transitions, 2108 flow [2022-07-13 21:57:59,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 719 transitions, 2068 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:57:59,533 INFO L242 Difference]: Finished difference. Result has 777 places, 693 transitions, 1868 flow [2022-07-13 21:57:59,534 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} [2022-07-13 21:57:59,534 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 72 predicate places. [2022-07-13 21:57:59,534 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 693 transitions, 1868 flow [2022-07-13 21:57:59,536 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) [2022-07-13 21:57:59,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:59,536 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] [2022-07-13 21:57:59,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:59,743 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 [2022-07-13 21:57:59,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:59,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:59,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1813980361, now seen corresponding path program 1 times [2022-07-13 21:57:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:59,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424343512] [2022-07-13 21:57:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:00,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:00,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424343512] [2022-07-13 21:58:00,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424343512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:00,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849357776] [2022-07-13 21:58:00,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:00,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:00,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:00,157 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) [2022-07-13 21:58:00,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-13 21:58:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:58:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:00,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:01,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849357776] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:01,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:01,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:58:01,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363880316] [2022-07-13 21:58:01,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:01,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:58:01,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:01,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:58:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:58:01,255 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 629 out of 796 [2022-07-13 21:58:01,265 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) [2022-07-13 21:58:01,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:01,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 629 of 796 [2022-07-13 21:58:01,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:02,228 INFO L129 PetriNetUnfolder]: 0/830 cut-off events. [2022-07-13 21:58:02,229 INFO L130 PetriNetUnfolder]: For 1135/1135 co-relation queries the response was YES. [2022-07-13 21:58:02,229 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. [2022-07-13 21:58:02,230 INFO L132 encePairwiseOnDemand]: 791/796 looper letters, 69 selfloop transitions, 67 changer transitions 0/744 dead transitions. [2022-07-13 21:58:02,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 744 transitions, 2542 flow [2022-07-13 21:58:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-13 21:58:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-13 21:58:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 43545 transitions. [2022-07-13 21:58:02,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928228097006773 [2022-07-13 21:58:02,246 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 43545 transitions. [2022-07-13 21:58:02,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 43545 transitions. [2022-07-13 21:58:02,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:02,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 43545 transitions. [2022-07-13 21:58:02,276 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) [2022-07-13 21:58:02,303 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) [2022-07-13 21:58:02,310 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) [2022-07-13 21:58:02,311 INFO L186 Difference]: Start difference. First operand has 777 places, 693 transitions, 1868 flow. Second operand 69 states and 43545 transitions. [2022-07-13 21:58:02,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 744 transitions, 2542 flow [2022-07-13 21:58:02,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 744 transitions, 2357 flow, removed 17 selfloop flow, removed 33 redundant places. [2022-07-13 21:58:02,321 INFO L242 Difference]: Finished difference. Result has 801 places, 703 transitions, 1999 flow [2022-07-13 21:58:02,321 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} [2022-07-13 21:58:02,322 INFO L279 CegarLoopForPetriNet]: 705 programPoint places, 96 predicate places. [2022-07-13 21:58:02,322 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 703 transitions, 1999 flow [2022-07-13 21:58:02,325 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) [2022-07-13 21:58:02,325 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:02,325 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] [2022-07-13 21:58:02,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:02,528 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 [2022-07-13 21:58:02,528 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash -780882567, now seen corresponding path program 1 times [2022-07-13 21:58:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:02,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026552832] [2022-07-13 21:58:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:02,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:02,555 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:02,591 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:02,592 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:02,592 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:58:02,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:58:02,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-07-13 21:58:02,592 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:58:02,593 WARN L231 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:02,593 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2022-07-13 21:58:02,632 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:58:02,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 734 places, 829 transitions, 2279 flow [2022-07-13 21:58:03,159 INFO L129 PetriNetUnfolder]: 234/1652 cut-off events. [2022-07-13 21:58:03,159 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-13 21:58:03,235 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. [2022-07-13 21:58:03,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 734 places, 829 transitions, 2279 flow [2022-07-13 21:58:03,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 734 places, 829 transitions, 2279 flow [2022-07-13 21:58:03,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:03,273 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:58:03,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:58:03,276 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-13 21:58:03,276 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:58:03,276 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:03,276 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] [2022-07-13 21:58:03,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1860539806, now seen corresponding path program 1 times [2022-07-13 21:58:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:03,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986138751] [2022-07-13 21:58:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:03,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:03,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986138751] [2022-07-13 21:58:03,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986138751] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:03,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:03,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:03,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693637269] [2022-07-13 21:58:03,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:03,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:03,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:03,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:03,296 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 656 out of 829 [2022-07-13 21:58:03,297 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) [2022-07-13 21:58:03,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:03,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 656 of 829 [2022-07-13 21:58:03,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:03,827 INFO L129 PetriNetUnfolder]: 0/1372 cut-off events. [2022-07-13 21:58:03,828 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-13 21:58:03,828 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. [2022-07-13 21:58:03,830 INFO L132 encePairwiseOnDemand]: 684/829 looper letters, 32 selfloop transitions, 2 changer transitions 11/690 dead transitions. [2022-07-13 21:58:03,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 690 transitions, 2069 flow [2022-07-13 21:58:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2152 transitions. [2022-07-13 21:58:03,832 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8652995577000402 [2022-07-13 21:58:03,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2152 transitions. [2022-07-13 21:58:03,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2152 transitions. [2022-07-13 21:58:03,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:03,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2152 transitions. [2022-07-13 21:58:03,834 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) [2022-07-13 21:58:03,835 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) [2022-07-13 21:58:03,835 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) [2022-07-13 21:58:03,835 INFO L186 Difference]: Start difference. First operand has 734 places, 829 transitions, 2279 flow. Second operand 3 states and 2152 transitions. [2022-07-13 21:58:03,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 690 transitions, 2069 flow [2022-07-13 21:58:03,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 690 transitions, 1563 flow, removed 253 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:03,844 INFO L242 Difference]: Finished difference. Result has 736 places, 676 transitions, 1477 flow [2022-07-13 21:58:03,844 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} [2022-07-13 21:58:03,845 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 2 predicate places. [2022-07-13 21:58:03,845 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 676 transitions, 1477 flow [2022-07-13 21:58:03,845 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) [2022-07-13 21:58:03,845 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:03,845 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:03,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-07-13 21:58:03,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:03,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:03,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1202039306, now seen corresponding path program 1 times [2022-07-13 21:58:03,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:03,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404523618] [2022-07-13 21:58:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:03,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:03,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404523618] [2022-07-13 21:58:03,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404523618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:03,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378596858] [2022-07-13 21:58:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:03,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:03,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:03,868 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) [2022-07-13 21:58:03,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-13 21:58:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:04,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:04,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:04,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378596858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:04,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:04,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:04,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046021779] [2022-07-13 21:58:04,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:04,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:04,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:04,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:04,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:04,332 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-13 21:58:04,334 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) [2022-07-13 21:58:04,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:04,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-13 21:58:04,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:04,797 INFO L129 PetriNetUnfolder]: 0/1097 cut-off events. [2022-07-13 21:58:04,797 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-07-13 21:58:04,798 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. [2022-07-13 21:58:04,800 INFO L132 encePairwiseOnDemand]: 823/829 looper letters, 33 selfloop transitions, 9 changer transitions 0/686 dead transitions. [2022-07-13 21:58:04,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 686 transitions, 1583 flow [2022-07-13 21:58:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:04,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5939 transitions. [2022-07-13 21:58:04,803 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7960058973327973 [2022-07-13 21:58:04,803 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5939 transitions. [2022-07-13 21:58:04,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5939 transitions. [2022-07-13 21:58:04,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:04,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5939 transitions. [2022-07-13 21:58:04,807 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) [2022-07-13 21:58:04,810 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) [2022-07-13 21:58:04,810 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) [2022-07-13 21:58:04,810 INFO L186 Difference]: Start difference. First operand has 736 places, 676 transitions, 1477 flow. Second operand 9 states and 5939 transitions. [2022-07-13 21:58:04,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 686 transitions, 1583 flow [2022-07-13 21:58:04,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 686 transitions, 1581 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:04,817 INFO L242 Difference]: Finished difference. Result has 735 places, 682 transitions, 1525 flow [2022-07-13 21:58:04,818 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} [2022-07-13 21:58:04,818 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 1 predicate places. [2022-07-13 21:58:04,818 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 682 transitions, 1525 flow [2022-07-13 21:58:04,819 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) [2022-07-13 21:58:04,819 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:04,819 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] [2022-07-13 21:58:04,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:05,021 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 [2022-07-13 21:58:05,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:05,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1084817695, now seen corresponding path program 1 times [2022-07-13 21:58:05,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:05,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510334059] [2022-07-13 21:58:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:05,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:05,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:05,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510334059] [2022-07-13 21:58:05,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510334059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:05,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569632605] [2022-07-13 21:58:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:05,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:05,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:05,063 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) [2022-07-13 21:58:05,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-13 21:58:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:05,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:05,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:05,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:05,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569632605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:05,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:05,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:58:05,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174024015] [2022-07-13 21:58:05,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:05,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:58:05,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:05,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:58:05,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:58:05,695 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-13 21:58:05,698 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) [2022-07-13 21:58:05,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:05,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-13 21:58:05,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:06,248 INFO L129 PetriNetUnfolder]: 0/1053 cut-off events. [2022-07-13 21:58:06,249 INFO L130 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-07-13 21:58:06,249 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. [2022-07-13 21:58:06,251 INFO L132 encePairwiseOnDemand]: 823/829 looper letters, 41 selfloop transitions, 21 changer transitions 0/706 dead transitions. [2022-07-13 21:58:06,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 706 transitions, 1757 flow [2022-07-13 21:58:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13821 transitions. [2022-07-13 21:58:06,256 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7938997070480786 [2022-07-13 21:58:06,257 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13821 transitions. [2022-07-13 21:58:06,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13821 transitions. [2022-07-13 21:58:06,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:06,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13821 transitions. [2022-07-13 21:58:06,265 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) [2022-07-13 21:58:06,272 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) [2022-07-13 21:58:06,273 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) [2022-07-13 21:58:06,273 INFO L186 Difference]: Start difference. First operand has 735 places, 682 transitions, 1525 flow. Second operand 21 states and 13821 transitions. [2022-07-13 21:58:06,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 706 transitions, 1757 flow [2022-07-13 21:58:06,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 754 places, 706 transitions, 1743 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:06,281 INFO L242 Difference]: Finished difference. Result has 759 places, 695 transitions, 1649 flow [2022-07-13 21:58:06,282 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} [2022-07-13 21:58:06,282 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 25 predicate places. [2022-07-13 21:58:06,282 INFO L495 AbstractCegarLoop]: Abstraction has has 759 places, 695 transitions, 1649 flow [2022-07-13 21:58:06,283 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) [2022-07-13 21:58:06,283 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:06,283 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] [2022-07-13 21:58:06,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:06,499 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 [2022-07-13 21:58:06,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash 709153987, now seen corresponding path program 1 times [2022-07-13 21:58:06,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:06,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36791461] [2022-07-13 21:58:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:06,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:06,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:06,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36791461] [2022-07-13 21:58:06,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36791461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:06,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384979227] [2022-07-13 21:58:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:06,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:06,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:06,621 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) [2022-07-13 21:58:06,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-13 21:58:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:07,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:07,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:07,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384979227] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:07,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:07,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:58:07,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888106283] [2022-07-13 21:58:07,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:07,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:58:07,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:07,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:58:07,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:58:07,353 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-13 21:58:07,373 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) [2022-07-13 21:58:07,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:07,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-13 21:58:07,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:08,144 INFO L129 PetriNetUnfolder]: 0/965 cut-off events. [2022-07-13 21:58:08,144 INFO L130 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-07-13 21:58:08,144 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. [2022-07-13 21:58:08,146 INFO L132 encePairwiseOnDemand]: 823/829 looper letters, 57 selfloop transitions, 45 changer transitions 0/746 dead transitions. [2022-07-13 21:58:08,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 746 transitions, 2169 flow [2022-07-13 21:58:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:58:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:58:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 29585 transitions. [2022-07-13 21:58:08,157 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930572309341911 [2022-07-13 21:58:08,157 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 29585 transitions. [2022-07-13 21:58:08,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 29585 transitions. [2022-07-13 21:58:08,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:08,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 29585 transitions. [2022-07-13 21:58:08,177 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) [2022-07-13 21:58:08,194 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) [2022-07-13 21:58:08,198 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) [2022-07-13 21:58:08,198 INFO L186 Difference]: Start difference. First operand has 759 places, 695 transitions, 1649 flow. Second operand 45 states and 29585 transitions. [2022-07-13 21:58:08,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 746 transitions, 2169 flow [2022-07-13 21:58:08,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 746 transitions, 2129 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:58:08,208 INFO L242 Difference]: Finished difference. Result has 806 places, 720 transitions, 1927 flow [2022-07-13 21:58:08,208 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} [2022-07-13 21:58:08,209 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 72 predicate places. [2022-07-13 21:58:08,209 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 720 transitions, 1927 flow [2022-07-13 21:58:08,210 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) [2022-07-13 21:58:08,211 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:08,211 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:08,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-07-13 21:58:08,416 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 [2022-07-13 21:58:08,416 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1368193207, now seen corresponding path program 1 times [2022-07-13 21:58:08,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:08,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838500261] [2022-07-13 21:58:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:08,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:08,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:08,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838500261] [2022-07-13 21:58:08,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838500261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:08,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314053306] [2022-07-13 21:58:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:08,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:08,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:08,765 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) [2022-07-13 21:58:08,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-13 21:58:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:09,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:58:09,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:09,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:10,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314053306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:10,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:10,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:58:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215639075] [2022-07-13 21:58:10,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:58:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:58:10,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:58:10,037 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 655 out of 829 [2022-07-13 21:58:10,048 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) [2022-07-13 21:58:10,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:10,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 655 of 829 [2022-07-13 21:58:10,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:11,246 INFO L129 PetriNetUnfolder]: 0/866 cut-off events. [2022-07-13 21:58:11,247 INFO L130 PetriNetUnfolder]: For 1256/1256 co-relation queries the response was YES. [2022-07-13 21:58:11,247 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. [2022-07-13 21:58:11,248 INFO L132 encePairwiseOnDemand]: 824/829 looper letters, 72 selfloop transitions, 70 changer transitions 0/776 dead transitions. [2022-07-13 21:58:11,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 776 transitions, 2657 flow [2022-07-13 21:58:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-13 21:58:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-13 21:58:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 47311 transitions. [2022-07-13 21:58:11,265 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926383862752983 [2022-07-13 21:58:11,265 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 47311 transitions. [2022-07-13 21:58:11,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 47311 transitions. [2022-07-13 21:58:11,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:11,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 47311 transitions. [2022-07-13 21:58:11,298 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) [2022-07-13 21:58:11,331 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) [2022-07-13 21:58:11,341 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) [2022-07-13 21:58:11,341 INFO L186 Difference]: Start difference. First operand has 806 places, 720 transitions, 1927 flow. Second operand 72 states and 47311 transitions. [2022-07-13 21:58:11,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 776 transitions, 2657 flow [2022-07-13 21:58:11,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 776 transitions, 2464 flow, removed 18 selfloop flow, removed 33 redundant places. [2022-07-13 21:58:11,377 INFO L242 Difference]: Finished difference. Result has 833 places, 733 transitions, 2087 flow [2022-07-13 21:58:11,378 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} [2022-07-13 21:58:11,378 INFO L279 CegarLoopForPetriNet]: 734 programPoint places, 99 predicate places. [2022-07-13 21:58:11,378 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 733 transitions, 2087 flow [2022-07-13 21:58:11,382 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) [2022-07-13 21:58:11,389 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:11,390 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] [2022-07-13 21:58:11,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:11,595 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 [2022-07-13 21:58:11,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash -136700829, now seen corresponding path program 1 times [2022-07-13 21:58:11,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:11,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497113842] [2022-07-13 21:58:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:11,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:11,622 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:11,660 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:11,661 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:11,661 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:58:11,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:58:11,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-07-13 21:58:11,661 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:58:11,662 WARN L231 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:11,662 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2022-07-13 21:58:11,704 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:58:11,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 763 places, 862 transitions, 2396 flow [2022-07-13 21:58:12,220 INFO L129 PetriNetUnfolder]: 244/1721 cut-off events. [2022-07-13 21:58:12,220 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-13 21:58:12,320 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. [2022-07-13 21:58:12,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 763 places, 862 transitions, 2396 flow [2022-07-13 21:58:12,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 763 places, 862 transitions, 2396 flow [2022-07-13 21:58:12,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:12,363 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:58:12,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:58:12,366 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2022-07-13 21:58:12,366 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:58:12,366 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:12,366 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:12,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2052186910, now seen corresponding path program 1 times [2022-07-13 21:58:12,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:12,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893332710] [2022-07-13 21:58:12,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:12,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:12,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:12,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893332710] [2022-07-13 21:58:12,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893332710] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:12,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:12,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:12,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460664523] [2022-07-13 21:58:12,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:12,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:12,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:12,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:12,385 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 682 out of 862 [2022-07-13 21:58:12,385 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) [2022-07-13 21:58:12,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:12,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 682 of 862 [2022-07-13 21:58:12,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:12,943 INFO L129 PetriNetUnfolder]: 0/1430 cut-off events. [2022-07-13 21:58:12,943 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-13 21:58:12,944 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. [2022-07-13 21:58:12,946 INFO L132 encePairwiseOnDemand]: 711/862 looper letters, 33 selfloop transitions, 2 changer transitions 11/717 dead transitions. [2022-07-13 21:58:12,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 717 transitions, 2176 flow [2022-07-13 21:58:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2237 transitions. [2022-07-13 21:58:12,947 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8650425367362722 [2022-07-13 21:58:12,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2237 transitions. [2022-07-13 21:58:12,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2237 transitions. [2022-07-13 21:58:12,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:12,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2237 transitions. [2022-07-13 21:58:12,950 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) [2022-07-13 21:58:12,951 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) [2022-07-13 21:58:12,951 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) [2022-07-13 21:58:12,951 INFO L186 Difference]: Start difference. First operand has 763 places, 862 transitions, 2396 flow. Second operand 3 states and 2237 transitions. [2022-07-13 21:58:12,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 717 transitions, 2176 flow [2022-07-13 21:58:12,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 717 transitions, 1624 flow, removed 276 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:12,961 INFO L242 Difference]: Finished difference. Result has 765 places, 703 transitions, 1536 flow [2022-07-13 21:58:12,962 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} [2022-07-13 21:58:12,962 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 2 predicate places. [2022-07-13 21:58:12,962 INFO L495 AbstractCegarLoop]: Abstraction has has 765 places, 703 transitions, 1536 flow [2022-07-13 21:58:12,962 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) [2022-07-13 21:58:12,962 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:12,962 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] [2022-07-13 21:58:12,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-07-13 21:58:12,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2110823594, now seen corresponding path program 1 times [2022-07-13 21:58:12,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:12,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36554444] [2022-07-13 21:58:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:12,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:12,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36554444] [2022-07-13 21:58:12,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36554444] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:12,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233076598] [2022-07-13 21:58:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:12,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:12,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:12,987 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) [2022-07-13 21:58:12,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-13 21:58:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:13,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:13,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233076598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:13,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:13,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:13,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446033583] [2022-07-13 21:58:13,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:13,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:13,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:13,500 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-13 21:58:13,502 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) [2022-07-13 21:58:13,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:13,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-13 21:58:13,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:14,004 INFO L129 PetriNetUnfolder]: 0/1144 cut-off events. [2022-07-13 21:58:14,005 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-13 21:58:14,005 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. [2022-07-13 21:58:14,007 INFO L132 encePairwiseOnDemand]: 856/862 looper letters, 34 selfloop transitions, 9 changer transitions 0/713 dead transitions. [2022-07-13 21:58:14,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 713 transitions, 1644 flow [2022-07-13 21:58:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6174 transitions. [2022-07-13 21:58:14,010 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7958236658932715 [2022-07-13 21:58:14,010 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6174 transitions. [2022-07-13 21:58:14,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6174 transitions. [2022-07-13 21:58:14,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:14,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6174 transitions. [2022-07-13 21:58:14,014 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) [2022-07-13 21:58:14,018 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) [2022-07-13 21:58:14,018 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) [2022-07-13 21:58:14,018 INFO L186 Difference]: Start difference. First operand has 765 places, 703 transitions, 1536 flow. Second operand 9 states and 6174 transitions. [2022-07-13 21:58:14,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 713 transitions, 1644 flow [2022-07-13 21:58:14,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 713 transitions, 1642 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:14,026 INFO L242 Difference]: Finished difference. Result has 764 places, 709 transitions, 1584 flow [2022-07-13 21:58:14,026 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} [2022-07-13 21:58:14,027 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 1 predicate places. [2022-07-13 21:58:14,027 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 709 transitions, 1584 flow [2022-07-13 21:58:14,027 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) [2022-07-13 21:58:14,028 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:14,028 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] [2022-07-13 21:58:14,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:14,228 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 [2022-07-13 21:58:14,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:14,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1492616703, now seen corresponding path program 1 times [2022-07-13 21:58:14,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:14,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399503223] [2022-07-13 21:58:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:14,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:14,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:14,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399503223] [2022-07-13 21:58:14,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399503223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:14,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996032716] [2022-07-13 21:58:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:14,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:14,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:14,271 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) [2022-07-13 21:58:14,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-13 21:58:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:14,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:14,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:14,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996032716] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:14,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:14,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:58:14,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080023749] [2022-07-13 21:58:14,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:14,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:58:14,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:14,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:58:14,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:58:14,864 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-13 21:58:14,868 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) [2022-07-13 21:58:14,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:14,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-13 21:58:14,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:15,560 INFO L129 PetriNetUnfolder]: 0/1100 cut-off events. [2022-07-13 21:58:15,560 INFO L130 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-07-13 21:58:15,561 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. [2022-07-13 21:58:15,562 INFO L132 encePairwiseOnDemand]: 856/862 looper letters, 42 selfloop transitions, 21 changer transitions 0/733 dead transitions. [2022-07-13 21:58:15,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 733 transitions, 1818 flow [2022-07-13 21:58:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14368 transitions. [2022-07-13 21:58:15,568 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7937244503369794 [2022-07-13 21:58:15,568 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14368 transitions. [2022-07-13 21:58:15,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14368 transitions. [2022-07-13 21:58:15,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:15,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14368 transitions. [2022-07-13 21:58:15,576 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) [2022-07-13 21:58:15,584 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) [2022-07-13 21:58:15,585 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) [2022-07-13 21:58:15,585 INFO L186 Difference]: Start difference. First operand has 764 places, 709 transitions, 1584 flow. Second operand 21 states and 14368 transitions. [2022-07-13 21:58:15,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 733 transitions, 1818 flow [2022-07-13 21:58:15,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 783 places, 733 transitions, 1804 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:15,593 INFO L242 Difference]: Finished difference. Result has 788 places, 722 transitions, 1708 flow [2022-07-13 21:58:15,594 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} [2022-07-13 21:58:15,594 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 25 predicate places. [2022-07-13 21:58:15,594 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 722 transitions, 1708 flow [2022-07-13 21:58:15,595 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) [2022-07-13 21:58:15,595 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:15,595 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] [2022-07-13 21:58:15,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:15,810 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 [2022-07-13 21:58:15,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash -111277213, now seen corresponding path program 1 times [2022-07-13 21:58:15,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:15,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914520858] [2022-07-13 21:58:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:15,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:15,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914520858] [2022-07-13 21:58:15,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914520858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:15,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254373149] [2022-07-13 21:58:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:15,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:15,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:15,914 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) [2022-07-13 21:58:15,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-13 21:58:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:16,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:16,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:16,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254373149] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:16,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:16,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:58:16,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863124238] [2022-07-13 21:58:16,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:16,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:58:16,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:58:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:58:16,664 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-13 21:58:16,670 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) [2022-07-13 21:58:16,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:16,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-13 21:58:16,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:17,556 INFO L129 PetriNetUnfolder]: 0/1012 cut-off events. [2022-07-13 21:58:17,557 INFO L130 PetriNetUnfolder]: For 519/519 co-relation queries the response was YES. [2022-07-13 21:58:17,557 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. [2022-07-13 21:58:17,559 INFO L132 encePairwiseOnDemand]: 856/862 looper letters, 58 selfloop transitions, 45 changer transitions 0/773 dead transitions. [2022-07-13 21:58:17,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 773 transitions, 2230 flow [2022-07-13 21:58:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:58:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:58:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 30756 transitions. [2022-07-13 21:58:17,571 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928847641144625 [2022-07-13 21:58:17,571 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 30756 transitions. [2022-07-13 21:58:17,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 30756 transitions. [2022-07-13 21:58:17,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:17,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 30756 transitions. [2022-07-13 21:58:17,593 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) [2022-07-13 21:58:17,614 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) [2022-07-13 21:58:17,619 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) [2022-07-13 21:58:17,620 INFO L186 Difference]: Start difference. First operand has 788 places, 722 transitions, 1708 flow. Second operand 45 states and 30756 transitions. [2022-07-13 21:58:17,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 773 transitions, 2230 flow [2022-07-13 21:58:17,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 826 places, 773 transitions, 2190 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:58:17,630 INFO L242 Difference]: Finished difference. Result has 835 places, 747 transitions, 1986 flow [2022-07-13 21:58:17,630 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} [2022-07-13 21:58:17,631 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 72 predicate places. [2022-07-13 21:58:17,631 INFO L495 AbstractCegarLoop]: Abstraction has has 835 places, 747 transitions, 1986 flow [2022-07-13 21:58:17,632 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) [2022-07-13 21:58:17,633 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:17,633 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] [2022-07-13 21:58:17,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:17,850 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 [2022-07-13 21:58:17,851 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash 74524247, now seen corresponding path program 1 times [2022-07-13 21:58:17,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:17,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544686559] [2022-07-13 21:58:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:18,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:18,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544686559] [2022-07-13 21:58:18,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544686559] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:18,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407219071] [2022-07-13 21:58:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:18,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:18,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:18,118 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) [2022-07-13 21:58:18,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-13 21:58:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:58:18,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:18,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:19,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407219071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:19,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:19,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:58:19,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817775628] [2022-07-13 21:58:19,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:19,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:58:19,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:58:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:58:19,575 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 681 out of 862 [2022-07-13 21:58:19,587 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) [2022-07-13 21:58:19,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:19,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 681 of 862 [2022-07-13 21:58:19,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:21,006 INFO L129 PetriNetUnfolder]: 0/902 cut-off events. [2022-07-13 21:58:21,006 INFO L130 PetriNetUnfolder]: For 1377/1377 co-relation queries the response was YES. [2022-07-13 21:58:21,008 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. [2022-07-13 21:58:21,009 INFO L132 encePairwiseOnDemand]: 857/862 looper letters, 75 selfloop transitions, 73 changer transitions 0/808 dead transitions. [2022-07-13 21:58:21,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 808 transitions, 2772 flow [2022-07-13 21:58:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-13 21:58:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-13 21:58:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 51233 transitions. [2022-07-13 21:58:21,028 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924671307037896 [2022-07-13 21:58:21,028 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 51233 transitions. [2022-07-13 21:58:21,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 51233 transitions. [2022-07-13 21:58:21,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:21,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 51233 transitions. [2022-07-13 21:58:21,063 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) [2022-07-13 21:58:21,100 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) [2022-07-13 21:58:21,110 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) [2022-07-13 21:58:21,111 INFO L186 Difference]: Start difference. First operand has 835 places, 747 transitions, 1986 flow. Second operand 75 states and 51233 transitions. [2022-07-13 21:58:21,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 808 transitions, 2772 flow [2022-07-13 21:58:21,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 865 places, 808 transitions, 2571 flow, removed 19 selfloop flow, removed 33 redundant places. [2022-07-13 21:58:21,121 INFO L242 Difference]: Finished difference. Result has 865 places, 763 transitions, 2175 flow [2022-07-13 21:58:21,121 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} [2022-07-13 21:58:21,121 INFO L279 CegarLoopForPetriNet]: 763 programPoint places, 102 predicate places. [2022-07-13 21:58:21,121 INFO L495 AbstractCegarLoop]: Abstraction has has 865 places, 763 transitions, 2175 flow [2022-07-13 21:58:21,125 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) [2022-07-13 21:58:21,126 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:21,126 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] [2022-07-13 21:58:21,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:21,346 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 [2022-07-13 21:58:21,347 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash 488055662, now seen corresponding path program 1 times [2022-07-13 21:58:21,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:21,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434844762] [2022-07-13 21:58:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:21,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:21,404 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:21,486 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:21,487 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:21,487 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:58:21,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:58:21,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-07-13 21:58:21,488 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:58:21,488 WARN L231 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:21,489 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2022-07-13 21:58:21,539 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:58:21,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 792 places, 895 transitions, 2515 flow [2022-07-13 21:58:22,149 INFO L129 PetriNetUnfolder]: 254/1790 cut-off events. [2022-07-13 21:58:22,150 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-13 21:58:22,258 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. [2022-07-13 21:58:22,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 792 places, 895 transitions, 2515 flow [2022-07-13 21:58:22,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 792 places, 895 transitions, 2515 flow [2022-07-13 21:58:22,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:22,307 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:58:22,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:58:22,311 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-13 21:58:22,311 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:58:22,311 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:22,311 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] [2022-07-13 21:58:22,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:22,311 INFO L85 PathProgramCache]: Analyzing trace with hash 180318754, now seen corresponding path program 1 times [2022-07-13 21:58:22,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:22,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694353704] [2022-07-13 21:58:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:22,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:22,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:22,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694353704] [2022-07-13 21:58:22,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694353704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:22,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:22,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:22,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957867807] [2022-07-13 21:58:22,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:22,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:22,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:22,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:22,332 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 708 out of 895 [2022-07-13 21:58:22,333 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) [2022-07-13 21:58:22,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:22,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 708 of 895 [2022-07-13 21:58:22,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:23,001 INFO L129 PetriNetUnfolder]: 0/1488 cut-off events. [2022-07-13 21:58:23,002 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-13 21:58:23,002 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. [2022-07-13 21:58:23,004 INFO L132 encePairwiseOnDemand]: 738/895 looper letters, 34 selfloop transitions, 2 changer transitions 11/744 dead transitions. [2022-07-13 21:58:23,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 744 transitions, 2285 flow [2022-07-13 21:58:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2322 transitions. [2022-07-13 21:58:23,006 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.864804469273743 [2022-07-13 21:58:23,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2322 transitions. [2022-07-13 21:58:23,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2322 transitions. [2022-07-13 21:58:23,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:23,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2322 transitions. [2022-07-13 21:58:23,007 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) [2022-07-13 21:58:23,009 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) [2022-07-13 21:58:23,009 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) [2022-07-13 21:58:23,009 INFO L186 Difference]: Start difference. First operand has 792 places, 895 transitions, 2515 flow. Second operand 3 states and 2322 transitions. [2022-07-13 21:58:23,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 744 transitions, 2285 flow [2022-07-13 21:58:23,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 744 transitions, 1685 flow, removed 300 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:23,018 INFO L242 Difference]: Finished difference. Result has 794 places, 730 transitions, 1595 flow [2022-07-13 21:58:23,019 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} [2022-07-13 21:58:23,019 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 2 predicate places. [2022-07-13 21:58:23,019 INFO L495 AbstractCegarLoop]: Abstraction has has 794 places, 730 transitions, 1595 flow [2022-07-13 21:58:23,019 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) [2022-07-13 21:58:23,019 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:23,019 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] [2022-07-13 21:58:23,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-07-13 21:58:23,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:23,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1827379178, now seen corresponding path program 1 times [2022-07-13 21:58:23,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:23,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081834627] [2022-07-13 21:58:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:23,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:23,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:23,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081834627] [2022-07-13 21:58:23,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081834627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:23,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928206092] [2022-07-13 21:58:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:23,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:23,046 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) [2022-07-13 21:58:23,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-13 21:58:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:23,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:23,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:23,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928206092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:23,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:23,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:23,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107489023] [2022-07-13 21:58:23,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:23,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:23,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:23,612 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-13 21:58:23,614 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) [2022-07-13 21:58:23,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:23,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-13 21:58:23,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:24,143 INFO L129 PetriNetUnfolder]: 0/1191 cut-off events. [2022-07-13 21:58:24,143 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-07-13 21:58:24,144 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. [2022-07-13 21:58:24,146 INFO L132 encePairwiseOnDemand]: 889/895 looper letters, 35 selfloop transitions, 9 changer transitions 0/740 dead transitions. [2022-07-13 21:58:24,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 740 transitions, 1705 flow [2022-07-13 21:58:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6409 transitions. [2022-07-13 21:58:24,149 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956548727498448 [2022-07-13 21:58:24,149 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6409 transitions. [2022-07-13 21:58:24,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6409 transitions. [2022-07-13 21:58:24,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:24,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6409 transitions. [2022-07-13 21:58:24,153 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) [2022-07-13 21:58:24,157 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) [2022-07-13 21:58:24,157 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) [2022-07-13 21:58:24,158 INFO L186 Difference]: Start difference. First operand has 794 places, 730 transitions, 1595 flow. Second operand 9 states and 6409 transitions. [2022-07-13 21:58:24,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 740 transitions, 1705 flow [2022-07-13 21:58:24,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 790 places, 740 transitions, 1703 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:24,165 INFO L242 Difference]: Finished difference. Result has 793 places, 736 transitions, 1643 flow [2022-07-13 21:58:24,166 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} [2022-07-13 21:58:24,166 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 1 predicate places. [2022-07-13 21:58:24,166 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 736 transitions, 1643 flow [2022-07-13 21:58:24,167 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) [2022-07-13 21:58:24,167 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:24,167 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] [2022-07-13 21:58:24,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-07-13 21:58:24,371 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 [2022-07-13 21:58:24,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:24,372 INFO L85 PathProgramCache]: Analyzing trace with hash -517161535, now seen corresponding path program 1 times [2022-07-13 21:58:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:24,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294789633] [2022-07-13 21:58:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:24,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:24,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294789633] [2022-07-13 21:58:24,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294789633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:24,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94171042] [2022-07-13 21:58:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:24,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:24,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:24,413 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) [2022-07-13 21:58:24,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-13 21:58:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:24,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:25,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94171042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:25,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:25,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:58:25,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277094024] [2022-07-13 21:58:25,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:25,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:58:25,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:58:25,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:58:25,044 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-13 21:58:25,048 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) [2022-07-13 21:58:25,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:25,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-13 21:58:25,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:25,676 INFO L129 PetriNetUnfolder]: 0/1147 cut-off events. [2022-07-13 21:58:25,676 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-07-13 21:58:25,677 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. [2022-07-13 21:58:25,679 INFO L132 encePairwiseOnDemand]: 889/895 looper letters, 43 selfloop transitions, 21 changer transitions 0/760 dead transitions. [2022-07-13 21:58:25,679 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 813 places, 760 transitions, 1879 flow [2022-07-13 21:58:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14915 transitions. [2022-07-13 21:58:25,685 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7935621175844639 [2022-07-13 21:58:25,685 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14915 transitions. [2022-07-13 21:58:25,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14915 transitions. [2022-07-13 21:58:25,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:25,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14915 transitions. [2022-07-13 21:58:25,695 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) [2022-07-13 21:58:25,775 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) [2022-07-13 21:58:25,776 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) [2022-07-13 21:58:25,776 INFO L186 Difference]: Start difference. First operand has 793 places, 736 transitions, 1643 flow. Second operand 21 states and 14915 transitions. [2022-07-13 21:58:25,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 813 places, 760 transitions, 1879 flow [2022-07-13 21:58:25,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 760 transitions, 1865 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:25,784 INFO L242 Difference]: Finished difference. Result has 817 places, 749 transitions, 1767 flow [2022-07-13 21:58:25,784 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} [2022-07-13 21:58:25,784 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 25 predicate places. [2022-07-13 21:58:25,784 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 749 transitions, 1767 flow [2022-07-13 21:58:25,786 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) [2022-07-13 21:58:25,786 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:25,786 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] [2022-07-13 21:58:25,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:26,005 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 [2022-07-13 21:58:26,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash 343952675, now seen corresponding path program 1 times [2022-07-13 21:58:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:26,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874453246] [2022-07-13 21:58:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:26,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:26,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874453246] [2022-07-13 21:58:26,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874453246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:26,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510105563] [2022-07-13 21:58:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:26,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:26,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:26,106 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) [2022-07-13 21:58:26,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-13 21:58:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:26,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:26,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:26,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:26,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510105563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:26,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:26,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:58:26,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817733454] [2022-07-13 21:58:26,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:26,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:58:26,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:26,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:58:26,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:58:26,862 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-13 21:58:26,869 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) [2022-07-13 21:58:26,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:26,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-13 21:58:26,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:27,701 INFO L129 PetriNetUnfolder]: 0/1059 cut-off events. [2022-07-13 21:58:27,701 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-13 21:58:27,702 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. [2022-07-13 21:58:27,703 INFO L132 encePairwiseOnDemand]: 889/895 looper letters, 59 selfloop transitions, 45 changer transitions 0/800 dead transitions. [2022-07-13 21:58:27,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 861 places, 800 transitions, 2291 flow [2022-07-13 21:58:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:58:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:58:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 31927 transitions. [2022-07-13 21:58:27,718 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927250155183116 [2022-07-13 21:58:27,718 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 31927 transitions. [2022-07-13 21:58:27,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 31927 transitions. [2022-07-13 21:58:27,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:27,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 31927 transitions. [2022-07-13 21:58:27,741 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) [2022-07-13 21:58:27,765 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) [2022-07-13 21:58:27,771 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) [2022-07-13 21:58:27,772 INFO L186 Difference]: Start difference. First operand has 817 places, 749 transitions, 1767 flow. Second operand 45 states and 31927 transitions. [2022-07-13 21:58:27,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 861 places, 800 transitions, 2291 flow [2022-07-13 21:58:27,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 800 transitions, 2251 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:58:27,811 INFO L242 Difference]: Finished difference. Result has 864 places, 774 transitions, 2045 flow [2022-07-13 21:58:27,811 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} [2022-07-13 21:58:27,812 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 72 predicate places. [2022-07-13 21:58:27,812 INFO L495 AbstractCegarLoop]: Abstraction has has 864 places, 774 transitions, 2045 flow [2022-07-13 21:58:27,813 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) [2022-07-13 21:58:27,814 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:27,814 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] [2022-07-13 21:58:27,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:28,029 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 [2022-07-13 21:58:28,029 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:28,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1400019945, now seen corresponding path program 1 times [2022-07-13 21:58:28,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:28,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44589878] [2022-07-13 21:58:28,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:28,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:28,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:28,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44589878] [2022-07-13 21:58:28,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44589878] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:28,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566707283] [2022-07-13 21:58:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:28,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:28,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:28,337 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) [2022-07-13 21:58:28,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-13 21:58:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:28,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:58:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:28,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:29,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566707283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:29,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:29,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:58:29,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128800316] [2022-07-13 21:58:29,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:29,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:58:29,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:29,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:58:29,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:58:29,416 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 895 [2022-07-13 21:58:29,428 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) [2022-07-13 21:58:29,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:29,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 895 [2022-07-13 21:58:29,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:30,983 INFO L129 PetriNetUnfolder]: 0/938 cut-off events. [2022-07-13 21:58:30,984 INFO L130 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2022-07-13 21:58:30,984 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. [2022-07-13 21:58:30,985 INFO L132 encePairwiseOnDemand]: 890/895 looper letters, 78 selfloop transitions, 76 changer transitions 0/840 dead transitions. [2022-07-13 21:58:30,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 840 transitions, 2887 flow [2022-07-13 21:58:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-13 21:58:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-13 21:58:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 55311 transitions. [2022-07-13 21:58:31,006 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923076923076923 [2022-07-13 21:58:31,006 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 55311 transitions. [2022-07-13 21:58:31,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 55311 transitions. [2022-07-13 21:58:31,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:31,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 55311 transitions. [2022-07-13 21:58:31,044 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) [2022-07-13 21:58:31,085 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) [2022-07-13 21:58:31,097 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) [2022-07-13 21:58:31,098 INFO L186 Difference]: Start difference. First operand has 864 places, 774 transitions, 2045 flow. Second operand 78 states and 55311 transitions. [2022-07-13 21:58:31,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 840 transitions, 2887 flow [2022-07-13 21:58:31,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 840 transitions, 2678 flow, removed 20 selfloop flow, removed 33 redundant places. [2022-07-13 21:58:31,130 INFO L242 Difference]: Finished difference. Result has 897 places, 793 transitions, 2263 flow [2022-07-13 21:58:31,131 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} [2022-07-13 21:58:31,131 INFO L279 CegarLoopForPetriNet]: 792 programPoint places, 105 predicate places. [2022-07-13 21:58:31,131 INFO L495 AbstractCegarLoop]: Abstraction has has 897 places, 793 transitions, 2263 flow [2022-07-13 21:58:31,135 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) [2022-07-13 21:58:31,136 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:31,136 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] [2022-07-13 21:58:31,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:31,355 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 [2022-07-13 21:58:31,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:31,355 INFO L85 PathProgramCache]: Analyzing trace with hash -906765510, now seen corresponding path program 1 times [2022-07-13 21:58:31,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:31,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106963210] [2022-07-13 21:58:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:31,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:31,395 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:31,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:31,468 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:31,468 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:58:31,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:58:31,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-07-13 21:58:31,469 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:58:31,469 WARN L231 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:31,469 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2022-07-13 21:58:31,540 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:58:31,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 821 places, 928 transitions, 2636 flow [2022-07-13 21:58:32,143 INFO L129 PetriNetUnfolder]: 264/1859 cut-off events. [2022-07-13 21:58:32,144 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-13 21:58:32,271 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. [2022-07-13 21:58:32,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 821 places, 928 transitions, 2636 flow [2022-07-13 21:58:32,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 821 places, 928 transitions, 2636 flow [2022-07-13 21:58:32,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:32,324 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:58:32,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:58:32,327 INFO L129 PetriNetUnfolder]: 4/78 cut-off events. [2022-07-13 21:58:32,327 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:58:32,327 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:32,328 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] [2022-07-13 21:58:32,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash 542009890, now seen corresponding path program 1 times [2022-07-13 21:58:32,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:32,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772244631] [2022-07-13 21:58:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:32,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:32,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:32,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772244631] [2022-07-13 21:58:32,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772244631] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:32,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:32,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:32,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279731942] [2022-07-13 21:58:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:32,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:32,357 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 734 out of 928 [2022-07-13 21:58:32,358 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) [2022-07-13 21:58:32,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:32,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 734 of 928 [2022-07-13 21:58:32,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:33,091 INFO L129 PetriNetUnfolder]: 0/1546 cut-off events. [2022-07-13 21:58:33,092 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-13 21:58:33,092 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. [2022-07-13 21:58:33,094 INFO L132 encePairwiseOnDemand]: 765/928 looper letters, 35 selfloop transitions, 2 changer transitions 11/771 dead transitions. [2022-07-13 21:58:33,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 771 transitions, 2396 flow [2022-07-13 21:58:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2407 transitions. [2022-07-13 21:58:33,096 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8645833333333334 [2022-07-13 21:58:33,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2407 transitions. [2022-07-13 21:58:33,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2407 transitions. [2022-07-13 21:58:33,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:33,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2407 transitions. [2022-07-13 21:58:33,099 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) [2022-07-13 21:58:33,100 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) [2022-07-13 21:58:33,100 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) [2022-07-13 21:58:33,100 INFO L186 Difference]: Start difference. First operand has 821 places, 928 transitions, 2636 flow. Second operand 3 states and 2407 transitions. [2022-07-13 21:58:33,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 771 transitions, 2396 flow [2022-07-13 21:58:33,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 822 places, 771 transitions, 1746 flow, removed 325 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:33,110 INFO L242 Difference]: Finished difference. Result has 823 places, 757 transitions, 1654 flow [2022-07-13 21:58:33,110 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} [2022-07-13 21:58:33,111 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 2 predicate places. [2022-07-13 21:58:33,111 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 757 transitions, 1654 flow [2022-07-13 21:58:33,111 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) [2022-07-13 21:58:33,111 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:33,111 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] [2022-07-13 21:58:33,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-07-13 21:58:33,112 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:33,112 INFO L85 PathProgramCache]: Analyzing trace with hash -351706058, now seen corresponding path program 1 times [2022-07-13 21:58:33,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:33,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503783677] [2022-07-13 21:58:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:33,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:33,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:33,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503783677] [2022-07-13 21:58:33,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503783677] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:33,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681378289] [2022-07-13 21:58:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:33,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:33,138 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) [2022-07-13 21:58:33,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-13 21:58:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:33,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:33,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:33,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681378289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:33,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:33,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:33,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611684678] [2022-07-13 21:58:33,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:33,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:33,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:33,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:33,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:33,780 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-13 21:58:33,783 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) [2022-07-13 21:58:33,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:33,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-13 21:58:33,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:34,372 INFO L129 PetriNetUnfolder]: 0/1238 cut-off events. [2022-07-13 21:58:34,372 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-13 21:58:34,373 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. [2022-07-13 21:58:34,375 INFO L132 encePairwiseOnDemand]: 922/928 looper letters, 36 selfloop transitions, 9 changer transitions 0/767 dead transitions. [2022-07-13 21:58:34,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 767 transitions, 1766 flow [2022-07-13 21:58:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6644 transitions. [2022-07-13 21:58:34,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954980842911877 [2022-07-13 21:58:34,378 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6644 transitions. [2022-07-13 21:58:34,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6644 transitions. [2022-07-13 21:58:34,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:34,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6644 transitions. [2022-07-13 21:58:34,382 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) [2022-07-13 21:58:34,386 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) [2022-07-13 21:58:34,387 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) [2022-07-13 21:58:34,387 INFO L186 Difference]: Start difference. First operand has 823 places, 757 transitions, 1654 flow. Second operand 9 states and 6644 transitions. [2022-07-13 21:58:34,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 767 transitions, 1766 flow [2022-07-13 21:58:34,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 767 transitions, 1764 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:34,395 INFO L242 Difference]: Finished difference. Result has 822 places, 763 transitions, 1702 flow [2022-07-13 21:58:34,395 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} [2022-07-13 21:58:34,396 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 1 predicate places. [2022-07-13 21:58:34,396 INFO L495 AbstractCegarLoop]: Abstraction has has 822 places, 763 transitions, 1702 flow [2022-07-13 21:58:34,396 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) [2022-07-13 21:58:34,396 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:34,397 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] [2022-07-13 21:58:34,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:34,599 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 [2022-07-13 21:58:34,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1841547809, now seen corresponding path program 1 times [2022-07-13 21:58:34,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:34,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655212043] [2022-07-13 21:58:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:34,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:34,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:34,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655212043] [2022-07-13 21:58:34,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655212043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:34,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324235994] [2022-07-13 21:58:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:34,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:34,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:34,650 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) [2022-07-13 21:58:34,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-13 21:58:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:35,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:35,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324235994] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:35,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:35,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:58:35,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906790996] [2022-07-13 21:58:35,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:35,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:58:35,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:35,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:58:35,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:58:35,334 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-13 21:58:35,337 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) [2022-07-13 21:58:35,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:35,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-13 21:58:35,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:36,104 INFO L129 PetriNetUnfolder]: 0/1194 cut-off events. [2022-07-13 21:58:36,105 INFO L130 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-07-13 21:58:36,105 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. [2022-07-13 21:58:36,107 INFO L132 encePairwiseOnDemand]: 922/928 looper letters, 44 selfloop transitions, 21 changer transitions 0/787 dead transitions. [2022-07-13 21:58:36,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 842 places, 787 transitions, 1940 flow [2022-07-13 21:58:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 15462 transitions. [2022-07-13 21:58:36,113 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934113300492611 [2022-07-13 21:58:36,113 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 15462 transitions. [2022-07-13 21:58:36,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 15462 transitions. [2022-07-13 21:58:36,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:36,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 15462 transitions. [2022-07-13 21:58:36,124 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) [2022-07-13 21:58:36,133 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) [2022-07-13 21:58:36,134 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) [2022-07-13 21:58:36,134 INFO L186 Difference]: Start difference. First operand has 822 places, 763 transitions, 1702 flow. Second operand 21 states and 15462 transitions. [2022-07-13 21:58:36,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 842 places, 787 transitions, 1940 flow [2022-07-13 21:58:36,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 787 transitions, 1926 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:36,146 INFO L242 Difference]: Finished difference. Result has 846 places, 776 transitions, 1826 flow [2022-07-13 21:58:36,146 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} [2022-07-13 21:58:36,147 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 25 predicate places. [2022-07-13 21:58:36,147 INFO L495 AbstractCegarLoop]: Abstraction has has 846 places, 776 transitions, 1826 flow [2022-07-13 21:58:36,148 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) [2022-07-13 21:58:36,148 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:36,148 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] [2022-07-13 21:58:36,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:36,367 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 [2022-07-13 21:58:36,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2074843651, now seen corresponding path program 1 times [2022-07-13 21:58:36,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:36,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099418520] [2022-07-13 21:58:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:36,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:36,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:36,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099418520] [2022-07-13 21:58:36,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099418520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:36,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989323906] [2022-07-13 21:58:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:36,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:36,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:36,536 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) [2022-07-13 21:58:36,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-13 21:58:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:37,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:37,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:37,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:37,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989323906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:37,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:37,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:58:37,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230449254] [2022-07-13 21:58:37,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:37,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:58:37,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:37,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:58:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:58:37,474 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-13 21:58:37,481 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) [2022-07-13 21:58:37,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:37,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-13 21:58:37,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:38,311 INFO L129 PetriNetUnfolder]: 0/1106 cut-off events. [2022-07-13 21:58:38,311 INFO L130 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-07-13 21:58:38,311 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. [2022-07-13 21:58:38,313 INFO L132 encePairwiseOnDemand]: 922/928 looper letters, 60 selfloop transitions, 45 changer transitions 0/827 dead transitions. [2022-07-13 21:58:38,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 827 transitions, 2352 flow [2022-07-13 21:58:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:58:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:58:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 33098 transitions. [2022-07-13 21:58:38,326 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925766283524904 [2022-07-13 21:58:38,326 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 33098 transitions. [2022-07-13 21:58:38,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 33098 transitions. [2022-07-13 21:58:38,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:38,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 33098 transitions. [2022-07-13 21:58:38,347 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) [2022-07-13 21:58:38,368 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) [2022-07-13 21:58:38,371 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) [2022-07-13 21:58:38,371 INFO L186 Difference]: Start difference. First operand has 846 places, 776 transitions, 1826 flow. Second operand 45 states and 33098 transitions. [2022-07-13 21:58:38,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 890 places, 827 transitions, 2352 flow [2022-07-13 21:58:38,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 884 places, 827 transitions, 2312 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:58:38,383 INFO L242 Difference]: Finished difference. Result has 893 places, 801 transitions, 2104 flow [2022-07-13 21:58:38,383 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} [2022-07-13 21:58:38,383 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 72 predicate places. [2022-07-13 21:58:38,383 INFO L495 AbstractCegarLoop]: Abstraction has has 893 places, 801 transitions, 2104 flow [2022-07-13 21:58:38,385 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) [2022-07-13 21:58:38,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:38,386 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] [2022-07-13 21:58:38,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-07-13 21:58:38,586 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 [2022-07-13 21:58:38,587 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:38,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:38,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1239527927, now seen corresponding path program 1 times [2022-07-13 21:58:38,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:38,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466651738] [2022-07-13 21:58:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:38,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:38,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:38,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466651738] [2022-07-13 21:58:38,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466651738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:38,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825462543] [2022-07-13 21:58:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:38,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:38,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:38,869 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) [2022-07-13 21:58:38,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-13 21:58:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:39,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:58:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:39,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:40,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825462543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:40,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:40,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:58:40,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445647080] [2022-07-13 21:58:40,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:40,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:58:40,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:40,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:58:40,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:58:40,344 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 733 out of 928 [2022-07-13 21:58:40,357 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) [2022-07-13 21:58:40,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:40,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 733 of 928 [2022-07-13 21:58:40,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:41,585 INFO L129 PetriNetUnfolder]: 0/974 cut-off events. [2022-07-13 21:58:41,585 INFO L130 PetriNetUnfolder]: For 1619/1619 co-relation queries the response was YES. [2022-07-13 21:58:41,586 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. [2022-07-13 21:58:41,587 INFO L132 encePairwiseOnDemand]: 923/928 looper letters, 81 selfloop transitions, 79 changer transitions 0/872 dead transitions. [2022-07-13 21:58:41,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 872 transitions, 3002 flow [2022-07-13 21:58:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-13 21:58:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-13 21:58:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 59545 transitions. [2022-07-13 21:58:41,609 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921588974031503 [2022-07-13 21:58:41,610 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 59545 transitions. [2022-07-13 21:58:41,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 59545 transitions. [2022-07-13 21:58:41,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:41,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 59545 transitions. [2022-07-13 21:58:41,651 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) [2022-07-13 21:58:41,801 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) [2022-07-13 21:58:41,811 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) [2022-07-13 21:58:41,811 INFO L186 Difference]: Start difference. First operand has 893 places, 801 transitions, 2104 flow. Second operand 81 states and 59545 transitions. [2022-07-13 21:58:41,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 872 transitions, 3002 flow [2022-07-13 21:58:41,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 872 transitions, 2785 flow, removed 21 selfloop flow, removed 33 redundant places. [2022-07-13 21:58:41,847 INFO L242 Difference]: Finished difference. Result has 929 places, 823 transitions, 2351 flow [2022-07-13 21:58:41,847 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} [2022-07-13 21:58:41,847 INFO L279 CegarLoopForPetriNet]: 821 programPoint places, 108 predicate places. [2022-07-13 21:58:41,848 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 823 transitions, 2351 flow [2022-07-13 21:58:41,852 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) [2022-07-13 21:58:41,852 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:41,852 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] [2022-07-13 21:58:41,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:42,072 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 [2022-07-13 21:58:42,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:42,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1409301607, now seen corresponding path program 1 times [2022-07-13 21:58:42,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:42,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135603592] [2022-07-13 21:58:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:42,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:42,103 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:42,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:42,151 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:42,151 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:58:42,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:58:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-07-13 21:58:42,151 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:58:42,151 WARN L231 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:42,152 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2022-07-13 21:58:42,191 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:58:42,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 850 places, 961 transitions, 2759 flow [2022-07-13 21:58:42,829 INFO L129 PetriNetUnfolder]: 274/1928 cut-off events. [2022-07-13 21:58:42,829 INFO L130 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-07-13 21:58:42,960 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. [2022-07-13 21:58:42,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 850 places, 961 transitions, 2759 flow [2022-07-13 21:58:43,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 850 places, 961 transitions, 2759 flow [2022-07-13 21:58:43,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:43,014 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:58:43,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:58:43,018 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2022-07-13 21:58:43,018 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:58:43,018 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:43,018 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] [2022-07-13 21:58:43,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:43,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:43,018 INFO L85 PathProgramCache]: Analyzing trace with hash -967113502, now seen corresponding path program 1 times [2022-07-13 21:58:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:43,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820007755] [2022-07-13 21:58:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:43,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:43,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:43,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820007755] [2022-07-13 21:58:43,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820007755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:43,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:43,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:43,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656511915] [2022-07-13 21:58:43,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:43,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:43,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:43,037 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 760 out of 961 [2022-07-13 21:58:43,038 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) [2022-07-13 21:58:43,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:43,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 760 of 961 [2022-07-13 21:58:43,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:43,807 INFO L129 PetriNetUnfolder]: 0/1604 cut-off events. [2022-07-13 21:58:43,807 INFO L130 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-07-13 21:58:43,807 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. [2022-07-13 21:58:43,810 INFO L132 encePairwiseOnDemand]: 792/961 looper letters, 36 selfloop transitions, 2 changer transitions 11/798 dead transitions. [2022-07-13 21:58:43,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 851 places, 798 transitions, 2509 flow [2022-07-13 21:58:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2492 transitions. [2022-07-13 21:58:43,812 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8643773846687478 [2022-07-13 21:58:43,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2492 transitions. [2022-07-13 21:58:43,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2492 transitions. [2022-07-13 21:58:43,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:43,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2492 transitions. [2022-07-13 21:58:43,814 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) [2022-07-13 21:58:43,816 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) [2022-07-13 21:58:43,816 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) [2022-07-13 21:58:43,816 INFO L186 Difference]: Start difference. First operand has 850 places, 961 transitions, 2759 flow. Second operand 3 states and 2492 transitions. [2022-07-13 21:58:43,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 851 places, 798 transitions, 2509 flow [2022-07-13 21:58:43,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 798 transitions, 1807 flow, removed 351 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:43,828 INFO L242 Difference]: Finished difference. Result has 852 places, 784 transitions, 1713 flow [2022-07-13 21:58:43,829 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} [2022-07-13 21:58:43,829 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 2 predicate places. [2022-07-13 21:58:43,830 INFO L495 AbstractCegarLoop]: Abstraction has has 852 places, 784 transitions, 1713 flow [2022-07-13 21:58:43,830 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) [2022-07-13 21:58:43,830 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:43,830 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] [2022-07-13 21:58:43,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-07-13 21:58:43,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:43,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1978771530, now seen corresponding path program 1 times [2022-07-13 21:58:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:43,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29113409] [2022-07-13 21:58:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:43,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:43,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:43,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29113409] [2022-07-13 21:58:43,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29113409] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:43,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748497647] [2022-07-13 21:58:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:43,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:43,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:43,870 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) [2022-07-13 21:58:43,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-13 21:58:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:44,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:44,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:44,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:44,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748497647] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:44,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:44,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:44,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513555867] [2022-07-13 21:58:44,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:44,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:44,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:44,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:44,510 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-13 21:58:44,513 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) [2022-07-13 21:58:44,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:44,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-13 21:58:44,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:45,126 INFO L129 PetriNetUnfolder]: 0/1285 cut-off events. [2022-07-13 21:58:45,126 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-13 21:58:45,127 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. [2022-07-13 21:58:45,129 INFO L132 encePairwiseOnDemand]: 955/961 looper letters, 37 selfloop transitions, 9 changer transitions 0/794 dead transitions. [2022-07-13 21:58:45,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 794 transitions, 1827 flow [2022-07-13 21:58:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6879 transitions. [2022-07-13 21:58:45,132 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953520638224072 [2022-07-13 21:58:45,132 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6879 transitions. [2022-07-13 21:58:45,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6879 transitions. [2022-07-13 21:58:45,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:45,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6879 transitions. [2022-07-13 21:58:45,136 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) [2022-07-13 21:58:45,140 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) [2022-07-13 21:58:45,140 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) [2022-07-13 21:58:45,141 INFO L186 Difference]: Start difference. First operand has 852 places, 784 transitions, 1713 flow. Second operand 9 states and 6879 transitions. [2022-07-13 21:58:45,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 794 transitions, 1827 flow [2022-07-13 21:58:45,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 848 places, 794 transitions, 1825 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:45,149 INFO L242 Difference]: Finished difference. Result has 851 places, 790 transitions, 1761 flow [2022-07-13 21:58:45,149 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} [2022-07-13 21:58:45,149 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 1 predicate places. [2022-07-13 21:58:45,149 INFO L495 AbstractCegarLoop]: Abstraction has has 851 places, 790 transitions, 1761 flow [2022-07-13 21:58:45,150 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) [2022-07-13 21:58:45,150 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:45,150 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] [2022-07-13 21:58:45,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:45,363 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 [2022-07-13 21:58:45,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:45,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1288544033, now seen corresponding path program 1 times [2022-07-13 21:58:45,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:45,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145764325] [2022-07-13 21:58:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:45,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:45,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:45,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145764325] [2022-07-13 21:58:45,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145764325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:45,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599210637] [2022-07-13 21:58:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:45,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:45,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:45,407 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) [2022-07-13 21:58:45,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-13 21:58:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:46,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:46,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:46,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:46,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599210637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:46,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:46,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:58:46,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565009345] [2022-07-13 21:58:46,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:46,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:58:46,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:46,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:58:46,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:58:46,109 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-13 21:58:46,113 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) [2022-07-13 21:58:46,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:46,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-13 21:58:46,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:46,835 INFO L129 PetriNetUnfolder]: 0/1241 cut-off events. [2022-07-13 21:58:46,835 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-13 21:58:46,835 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. [2022-07-13 21:58:46,838 INFO L132 encePairwiseOnDemand]: 955/961 looper letters, 45 selfloop transitions, 21 changer transitions 0/814 dead transitions. [2022-07-13 21:58:46,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 814 transitions, 2001 flow [2022-07-13 21:58:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16009 transitions. [2022-07-13 21:58:46,844 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932708983697537 [2022-07-13 21:58:46,844 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16009 transitions. [2022-07-13 21:58:46,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16009 transitions. [2022-07-13 21:58:46,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:46,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16009 transitions. [2022-07-13 21:58:46,854 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) [2022-07-13 21:58:46,863 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) [2022-07-13 21:58:46,864 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) [2022-07-13 21:58:46,864 INFO L186 Difference]: Start difference. First operand has 851 places, 790 transitions, 1761 flow. Second operand 21 states and 16009 transitions. [2022-07-13 21:58:46,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 814 transitions, 2001 flow [2022-07-13 21:58:46,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 814 transitions, 1987 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:46,875 INFO L242 Difference]: Finished difference. Result has 875 places, 803 transitions, 1885 flow [2022-07-13 21:58:46,875 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} [2022-07-13 21:58:46,875 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 25 predicate places. [2022-07-13 21:58:46,875 INFO L495 AbstractCegarLoop]: Abstraction has has 875 places, 803 transitions, 1885 flow [2022-07-13 21:58:46,877 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) [2022-07-13 21:58:46,877 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:46,877 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] [2022-07-13 21:58:46,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:47,097 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 [2022-07-13 21:58:47,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:47,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash 786428419, now seen corresponding path program 1 times [2022-07-13 21:58:47,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:47,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874684919] [2022-07-13 21:58:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:47,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:47,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874684919] [2022-07-13 21:58:47,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874684919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:47,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318966898] [2022-07-13 21:58:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:47,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:47,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:47,201 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) [2022-07-13 21:58:47,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-13 21:58:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:47,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:47,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:47,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:48,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318966898] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:48,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:48,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:58:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277664175] [2022-07-13 21:58:48,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:48,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:58:48,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:58:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:58:48,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-13 21:58:48,086 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) [2022-07-13 21:58:48,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:48,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-13 21:58:48,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:49,047 INFO L129 PetriNetUnfolder]: 0/1153 cut-off events. [2022-07-13 21:58:49,048 INFO L130 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2022-07-13 21:58:49,048 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. [2022-07-13 21:58:49,050 INFO L132 encePairwiseOnDemand]: 955/961 looper letters, 61 selfloop transitions, 45 changer transitions 0/854 dead transitions. [2022-07-13 21:58:49,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 919 places, 854 transitions, 2413 flow [2022-07-13 21:58:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:58:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:58:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 34269 transitions. [2022-07-13 21:58:49,062 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924384321886924 [2022-07-13 21:58:49,062 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 34269 transitions. [2022-07-13 21:58:49,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 34269 transitions. [2022-07-13 21:58:49,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:49,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 34269 transitions. [2022-07-13 21:58:49,084 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) [2022-07-13 21:58:49,106 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) [2022-07-13 21:58:49,111 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) [2022-07-13 21:58:49,111 INFO L186 Difference]: Start difference. First operand has 875 places, 803 transitions, 1885 flow. Second operand 45 states and 34269 transitions. [2022-07-13 21:58:49,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 919 places, 854 transitions, 2413 flow [2022-07-13 21:58:49,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 913 places, 854 transitions, 2373 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:58:49,122 INFO L242 Difference]: Finished difference. Result has 922 places, 828 transitions, 2163 flow [2022-07-13 21:58:49,123 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} [2022-07-13 21:58:49,123 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 72 predicate places. [2022-07-13 21:58:49,123 INFO L495 AbstractCegarLoop]: Abstraction has has 922 places, 828 transitions, 2163 flow [2022-07-13 21:58:49,125 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) [2022-07-13 21:58:49,125 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:49,126 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] [2022-07-13 21:58:49,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:49,341 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 [2022-07-13 21:58:49,341 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash -596766729, now seen corresponding path program 1 times [2022-07-13 21:58:49,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:49,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162035915] [2022-07-13 21:58:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:49,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:49,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:49,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162035915] [2022-07-13 21:58:49,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162035915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:49,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063131695] [2022-07-13 21:58:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:49,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:49,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:49,633 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) [2022-07-13 21:58:49,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-07-13 21:58:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:50,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:58:50,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:50,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:50,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063131695] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:50,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:50,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:58:50,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278356056] [2022-07-13 21:58:50,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:50,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:58:50,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:50,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:58:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:58:50,903 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 759 out of 961 [2022-07-13 21:58:50,916 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) [2022-07-13 21:58:50,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:50,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 759 of 961 [2022-07-13 21:58:50,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:52,639 INFO L129 PetriNetUnfolder]: 0/1010 cut-off events. [2022-07-13 21:58:52,640 INFO L130 PetriNetUnfolder]: For 1740/1740 co-relation queries the response was YES. [2022-07-13 21:58:52,641 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. [2022-07-13 21:58:52,642 INFO L132 encePairwiseOnDemand]: 956/961 looper letters, 84 selfloop transitions, 82 changer transitions 0/904 dead transitions. [2022-07-13 21:58:52,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 994 places, 904 transitions, 3117 flow [2022-07-13 21:58:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-13 21:58:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-07-13 21:58:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 63935 transitions. [2022-07-13 21:58:52,666 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7920197215202418 [2022-07-13 21:58:52,666 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 63935 transitions. [2022-07-13 21:58:52,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 63935 transitions. [2022-07-13 21:58:52,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:52,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 63935 transitions. [2022-07-13 21:58:52,709 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) [2022-07-13 21:58:52,754 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) [2022-07-13 21:58:52,768 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) [2022-07-13 21:58:52,768 INFO L186 Difference]: Start difference. First operand has 922 places, 828 transitions, 2163 flow. Second operand 84 states and 63935 transitions. [2022-07-13 21:58:52,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 994 places, 904 transitions, 3117 flow [2022-07-13 21:58:52,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 961 places, 904 transitions, 2892 flow, removed 22 selfloop flow, removed 33 redundant places. [2022-07-13 21:58:52,781 INFO L242 Difference]: Finished difference. Result has 961 places, 853 transitions, 2439 flow [2022-07-13 21:58:52,781 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} [2022-07-13 21:58:52,781 INFO L279 CegarLoopForPetriNet]: 850 programPoint places, 111 predicate places. [2022-07-13 21:58:52,781 INFO L495 AbstractCegarLoop]: Abstraction has has 961 places, 853 transitions, 2439 flow [2022-07-13 21:58:52,785 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) [2022-07-13 21:58:52,785 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:52,785 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] [2022-07-13 21:58:52,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:52,989 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 [2022-07-13 21:58:52,989 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:52,990 INFO L85 PathProgramCache]: Analyzing trace with hash -98295915, now seen corresponding path program 1 times [2022-07-13 21:58:52,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:52,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879443577] [2022-07-13 21:58:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:52,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:53,032 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:53,082 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:53,082 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:53,082 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:58:53,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:58:53,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-07-13 21:58:53,083 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:58:53,083 WARN L231 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:53,083 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2022-07-13 21:58:53,150 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:58:53,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 879 places, 994 transitions, 2884 flow [2022-07-13 21:58:53,839 INFO L129 PetriNetUnfolder]: 284/1997 cut-off events. [2022-07-13 21:58:53,839 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-13 21:58:53,963 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. [2022-07-13 21:58:53,964 INFO L82 GeneralOperation]: Start removeDead. Operand has 879 places, 994 transitions, 2884 flow [2022-07-13 21:58:54,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 879 places, 994 transitions, 2884 flow [2022-07-13 21:58:54,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:54,017 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:58:54,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:58:54,020 INFO L129 PetriNetUnfolder]: 5/80 cut-off events. [2022-07-13 21:58:54,020 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:58:54,020 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:54,020 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] [2022-07-13 21:58:54,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:54,021 INFO L85 PathProgramCache]: Analyzing trace with hash -52084126, now seen corresponding path program 1 times [2022-07-13 21:58:54,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:54,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035185346] [2022-07-13 21:58:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:54,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:54,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035185346] [2022-07-13 21:58:54,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035185346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:54,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:54,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:54,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670854716] [2022-07-13 21:58:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:54,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:54,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:54,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 786 out of 994 [2022-07-13 21:58:54,042 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) [2022-07-13 21:58:54,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:54,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 786 of 994 [2022-07-13 21:58:54,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:54,842 INFO L129 PetriNetUnfolder]: 0/1662 cut-off events. [2022-07-13 21:58:54,842 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-13 21:58:54,843 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. [2022-07-13 21:58:54,845 INFO L132 encePairwiseOnDemand]: 819/994 looper letters, 37 selfloop transitions, 2 changer transitions 11/825 dead transitions. [2022-07-13 21:58:54,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 825 transitions, 2624 flow [2022-07-13 21:58:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2577 transitions. [2022-07-13 21:58:54,847 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.864185110663984 [2022-07-13 21:58:54,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2577 transitions. [2022-07-13 21:58:54,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2577 transitions. [2022-07-13 21:58:54,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:54,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2577 transitions. [2022-07-13 21:58:54,850 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) [2022-07-13 21:58:54,851 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) [2022-07-13 21:58:54,851 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) [2022-07-13 21:58:54,852 INFO L186 Difference]: Start difference. First operand has 879 places, 994 transitions, 2884 flow. Second operand 3 states and 2577 transitions. [2022-07-13 21:58:54,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 825 transitions, 2624 flow [2022-07-13 21:58:54,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 880 places, 825 transitions, 1868 flow, removed 378 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:54,862 INFO L242 Difference]: Finished difference. Result has 881 places, 811 transitions, 1772 flow [2022-07-13 21:58:54,863 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} [2022-07-13 21:58:54,863 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 2 predicate places. [2022-07-13 21:58:54,863 INFO L495 AbstractCegarLoop]: Abstraction has has 881 places, 811 transitions, 1772 flow [2022-07-13 21:58:54,863 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) [2022-07-13 21:58:54,864 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:54,864 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] [2022-07-13 21:58:54,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-07-13 21:58:54,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1881358998, now seen corresponding path program 1 times [2022-07-13 21:58:54,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:54,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917109081] [2022-07-13 21:58:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:54,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:54,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:54,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917109081] [2022-07-13 21:58:54,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917109081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:54,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429232974] [2022-07-13 21:58:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:54,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:54,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:54,921 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) [2022-07-13 21:58:54,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-07-13 21:58:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:55,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:55,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:55,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429232974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:55,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:55,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:55,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921021376] [2022-07-13 21:58:55,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:55,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:55,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:55,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:55,578 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-13 21:58:55,580 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) [2022-07-13 21:58:55,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:55,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-13 21:58:55,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:56,237 INFO L129 PetriNetUnfolder]: 0/1332 cut-off events. [2022-07-13 21:58:56,237 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-13 21:58:56,237 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. [2022-07-13 21:58:56,239 INFO L132 encePairwiseOnDemand]: 988/994 looper letters, 38 selfloop transitions, 9 changer transitions 0/821 dead transitions. [2022-07-13 21:58:56,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 878 places, 821 transitions, 1888 flow [2022-07-13 21:58:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:58:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:58:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7114 transitions. [2022-07-13 21:58:56,243 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7952157388777107 [2022-07-13 21:58:56,243 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7114 transitions. [2022-07-13 21:58:56,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7114 transitions. [2022-07-13 21:58:56,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:56,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7114 transitions. [2022-07-13 21:58:56,248 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) [2022-07-13 21:58:56,252 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) [2022-07-13 21:58:56,252 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) [2022-07-13 21:58:56,252 INFO L186 Difference]: Start difference. First operand has 881 places, 811 transitions, 1772 flow. Second operand 9 states and 7114 transitions. [2022-07-13 21:58:56,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 878 places, 821 transitions, 1888 flow [2022-07-13 21:58:56,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 877 places, 821 transitions, 1886 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:56,261 INFO L242 Difference]: Finished difference. Result has 880 places, 817 transitions, 1820 flow [2022-07-13 21:58:56,261 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} [2022-07-13 21:58:56,261 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 1 predicate places. [2022-07-13 21:58:56,261 INFO L495 AbstractCegarLoop]: Abstraction has has 880 places, 817 transitions, 1820 flow [2022-07-13 21:58:56,262 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) [2022-07-13 21:58:56,262 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:56,262 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] [2022-07-13 21:58:56,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:56,482 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 [2022-07-13 21:58:56,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2118794433, now seen corresponding path program 1 times [2022-07-13 21:58:56,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:56,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786745775] [2022-07-13 21:58:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:56,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786745775] [2022-07-13 21:58:56,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786745775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790885893] [2022-07-13 21:58:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:56,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:56,529 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) [2022-07-13 21:58:56,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-07-13 21:58:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:57,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:58:57,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:57,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:57,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790885893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:57,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:57,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:58:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284275016] [2022-07-13 21:58:57,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:57,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:58:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:58:57,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:58:57,246 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-13 21:58:57,250 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) [2022-07-13 21:58:57,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:57,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-13 21:58:57,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:58,049 INFO L129 PetriNetUnfolder]: 0/1288 cut-off events. [2022-07-13 21:58:58,049 INFO L130 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-07-13 21:58:58,049 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. [2022-07-13 21:58:58,052 INFO L132 encePairwiseOnDemand]: 988/994 looper letters, 46 selfloop transitions, 21 changer transitions 0/841 dead transitions. [2022-07-13 21:58:58,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 841 transitions, 2062 flow [2022-07-13 21:58:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:58,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16556 transitions. [2022-07-13 21:58:58,058 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931397911277187 [2022-07-13 21:58:58,059 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16556 transitions. [2022-07-13 21:58:58,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16556 transitions. [2022-07-13 21:58:58,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:58,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16556 transitions. [2022-07-13 21:58:58,069 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) [2022-07-13 21:58:58,078 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) [2022-07-13 21:58:58,080 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) [2022-07-13 21:58:58,080 INFO L186 Difference]: Start difference. First operand has 880 places, 817 transitions, 1820 flow. Second operand 21 states and 16556 transitions. [2022-07-13 21:58:58,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 841 transitions, 2062 flow [2022-07-13 21:58:58,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 899 places, 841 transitions, 2048 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:58,090 INFO L242 Difference]: Finished difference. Result has 904 places, 830 transitions, 1944 flow [2022-07-13 21:58:58,090 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} [2022-07-13 21:58:58,090 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 25 predicate places. [2022-07-13 21:58:58,090 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 830 transitions, 1944 flow [2022-07-13 21:58:58,091 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) [2022-07-13 21:58:58,092 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:58,092 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] [2022-07-13 21:58:58,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-07-13 21:58:58,304 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 [2022-07-13 21:58:58,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash 773674275, now seen corresponding path program 1 times [2022-07-13 21:58:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:58,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395648183] [2022-07-13 21:58:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:58,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:58,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395648183] [2022-07-13 21:58:58,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395648183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:58,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388082237] [2022-07-13 21:58:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:58,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:58,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:58,463 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) [2022-07-13 21:58:58,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-07-13 21:58:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:59,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:58:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:59,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:59,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388082237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:59,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:59,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:58:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074531395] [2022-07-13 21:58:59,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:59,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:58:59,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:58:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:58:59,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-13 21:58:59,441 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) [2022-07-13 21:58:59,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:59,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-13 21:58:59,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:00,438 INFO L129 PetriNetUnfolder]: 0/1200 cut-off events. [2022-07-13 21:59:00,438 INFO L130 PetriNetUnfolder]: For 627/627 co-relation queries the response was YES. [2022-07-13 21:59:00,439 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. [2022-07-13 21:59:00,440 INFO L132 encePairwiseOnDemand]: 988/994 looper letters, 62 selfloop transitions, 45 changer transitions 0/881 dead transitions. [2022-07-13 21:59:00,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 881 transitions, 2474 flow [2022-07-13 21:59:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:59:00,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:59:00,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 35440 transitions. [2022-07-13 21:59:00,454 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923094120277219 [2022-07-13 21:59:00,455 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 35440 transitions. [2022-07-13 21:59:00,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 35440 transitions. [2022-07-13 21:59:00,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:00,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 35440 transitions. [2022-07-13 21:59:00,479 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) [2022-07-13 21:59:00,500 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) [2022-07-13 21:59:00,506 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) [2022-07-13 21:59:00,507 INFO L186 Difference]: Start difference. First operand has 904 places, 830 transitions, 1944 flow. Second operand 45 states and 35440 transitions. [2022-07-13 21:59:00,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 881 transitions, 2474 flow [2022-07-13 21:59:00,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 942 places, 881 transitions, 2434 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:59:00,518 INFO L242 Difference]: Finished difference. Result has 951 places, 855 transitions, 2222 flow [2022-07-13 21:59:00,518 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} [2022-07-13 21:59:00,518 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 72 predicate places. [2022-07-13 21:59:00,518 INFO L495 AbstractCegarLoop]: Abstraction has has 951 places, 855 transitions, 2222 flow [2022-07-13 21:59:00,521 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) [2022-07-13 21:59:00,521 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:00,521 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] [2022-07-13 21:59:00,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-07-13 21:59:00,742 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 [2022-07-13 21:59:00,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1681030679, now seen corresponding path program 1 times [2022-07-13 21:59:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:00,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881478417] [2022-07-13 21:59:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:01,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881478417] [2022-07-13 21:59:01,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881478417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856812973] [2022-07-13 21:59:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:01,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:01,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:01,049 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) [2022-07-13 21:59:01,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-07-13 21:59:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:01,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:59:01,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:01,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:02,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856812973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:02,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:02,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:59:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602385082] [2022-07-13 21:59:02,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:02,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:59:02,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:59:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:59:02,419 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 785 out of 994 [2022-07-13 21:59:02,434 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) [2022-07-13 21:59:02,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:02,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 785 of 994 [2022-07-13 21:59:02,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:04,047 INFO L129 PetriNetUnfolder]: 0/1046 cut-off events. [2022-07-13 21:59:04,047 INFO L130 PetriNetUnfolder]: For 1861/1861 co-relation queries the response was YES. [2022-07-13 21:59:04,047 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. [2022-07-13 21:59:04,049 INFO L132 encePairwiseOnDemand]: 989/994 looper letters, 87 selfloop transitions, 85 changer transitions 0/936 dead transitions. [2022-07-13 21:59:04,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1026 places, 936 transitions, 3232 flow [2022-07-13 21:59:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-13 21:59:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-13 21:59:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 68481 transitions. [2022-07-13 21:59:04,075 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918892666342885 [2022-07-13 21:59:04,076 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 68481 transitions. [2022-07-13 21:59:04,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 68481 transitions. [2022-07-13 21:59:04,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:04,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 68481 transitions. [2022-07-13 21:59:04,123 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) [2022-07-13 21:59:04,168 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) [2022-07-13 21:59:04,181 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) [2022-07-13 21:59:04,181 INFO L186 Difference]: Start difference. First operand has 951 places, 855 transitions, 2222 flow. Second operand 87 states and 68481 transitions. [2022-07-13 21:59:04,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1026 places, 936 transitions, 3232 flow [2022-07-13 21:59:04,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 936 transitions, 2999 flow, removed 23 selfloop flow, removed 33 redundant places. [2022-07-13 21:59:04,194 INFO L242 Difference]: Finished difference. Result has 993 places, 883 transitions, 2527 flow [2022-07-13 21:59:04,194 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} [2022-07-13 21:59:04,199 INFO L279 CegarLoopForPetriNet]: 879 programPoint places, 114 predicate places. [2022-07-13 21:59:04,199 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 883 transitions, 2527 flow [2022-07-13 21:59:04,203 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) [2022-07-13 21:59:04,203 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:04,203 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] [2022-07-13 21:59:04,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:04,423 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 [2022-07-13 21:59:04,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:04,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1162920604, now seen corresponding path program 1 times [2022-07-13 21:59:04,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:04,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529313569] [2022-07-13 21:59:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:04,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:59:04,455 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:59:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:59:04,506 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:59:04,506 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:59:04,506 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:59:04,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:59:04,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-07-13 21:59:04,506 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:59:04,507 WARN L231 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:59:04,507 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2022-07-13 21:59:04,552 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:59:04,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 908 places, 1027 transitions, 3011 flow [2022-07-13 21:59:05,280 INFO L129 PetriNetUnfolder]: 294/2066 cut-off events. [2022-07-13 21:59:05,280 INFO L130 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2022-07-13 21:59:05,413 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. [2022-07-13 21:59:05,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 908 places, 1027 transitions, 3011 flow [2022-07-13 21:59:05,469 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 908 places, 1027 transitions, 3011 flow [2022-07-13 21:59:05,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:59:05,470 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:59:05,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:59:05,473 INFO L129 PetriNetUnfolder]: 2/73 cut-off events. [2022-07-13 21:59:05,473 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:59:05,473 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:05,473 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] [2022-07-13 21:59:05,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:05,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash 789082081, now seen corresponding path program 1 times [2022-07-13 21:59:05,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:05,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498181251] [2022-07-13 21:59:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:05,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:05,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:05,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498181251] [2022-07-13 21:59:05,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498181251] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:05,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:05,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:59:05,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032217007] [2022-07-13 21:59:05,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:05,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:59:05,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:05,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:59:05,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:59:05,490 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 819 out of 1027 [2022-07-13 21:59:05,491 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) [2022-07-13 21:59:05,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:05,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 819 of 1027 [2022-07-13 21:59:05,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:06,212 INFO L129 PetriNetUnfolder]: 0/1742 cut-off events. [2022-07-13 21:59:06,212 INFO L130 PetriNetUnfolder]: For 4901/4901 co-relation queries the response was YES. [2022-07-13 21:59:06,212 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. [2022-07-13 21:59:06,215 INFO L132 encePairwiseOnDemand]: 849/1027 looper letters, 29 selfloop transitions, 0 changer transitions 11/848 dead transitions. [2022-07-13 21:59:06,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 848 transitions, 2711 flow [2022-07-13 21:59:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:59:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:59:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1845 transitions. [2022-07-13 21:59:06,217 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8982473222979552 [2022-07-13 21:59:06,217 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1845 transitions. [2022-07-13 21:59:06,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1845 transitions. [2022-07-13 21:59:06,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:06,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1845 transitions. [2022-07-13 21:59:06,218 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) [2022-07-13 21:59:06,219 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) [2022-07-13 21:59:06,220 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) [2022-07-13 21:59:06,220 INFO L186 Difference]: Start difference. First operand has 908 places, 1027 transitions, 3011 flow. Second operand 2 states and 1845 transitions. [2022-07-13 21:59:06,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 848 transitions, 2711 flow [2022-07-13 21:59:06,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 908 places, 848 transitions, 1899 flow, removed 406 selfloop flow, removed 0 redundant places. [2022-07-13 21:59:06,234 INFO L242 Difference]: Finished difference. Result has 908 places, 837 transitions, 1819 flow [2022-07-13 21:59:06,234 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} [2022-07-13 21:59:06,234 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 0 predicate places. [2022-07-13 21:59:06,234 INFO L495 AbstractCegarLoop]: Abstraction has has 908 places, 837 transitions, 1819 flow [2022-07-13 21:59:06,235 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) [2022-07-13 21:59:06,235 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:06,235 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] [2022-07-13 21:59:06,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-07-13 21:59:06,235 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1007869278, now seen corresponding path program 1 times [2022-07-13 21:59:06,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:06,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764001616] [2022-07-13 21:59:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:06,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:06,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764001616] [2022-07-13 21:59:06,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764001616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:06,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:06,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:59:06,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475088733] [2022-07-13 21:59:06,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:06,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:59:06,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:06,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:59:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:59:06,255 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 812 out of 1027 [2022-07-13 21:59:06,256 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) [2022-07-13 21:59:06,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:06,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 812 of 1027 [2022-07-13 21:59:06,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:06,887 INFO L129 PetriNetUnfolder]: 0/1401 cut-off events. [2022-07-13 21:59:06,888 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-13 21:59:06,888 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. [2022-07-13 21:59:06,890 INFO L132 encePairwiseOnDemand]: 1024/1027 looper letters, 38 selfloop transitions, 2 changer transitions 0/841 dead transitions. [2022-07-13 21:59:06,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 899 places, 841 transitions, 1907 flow [2022-07-13 21:59:06,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:59:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:59:06,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2477 transitions. [2022-07-13 21:59:06,892 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8039597533268419 [2022-07-13 21:59:06,892 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2477 transitions. [2022-07-13 21:59:06,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2477 transitions. [2022-07-13 21:59:06,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:06,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2477 transitions. [2022-07-13 21:59:06,894 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) [2022-07-13 21:59:06,895 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) [2022-07-13 21:59:06,895 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) [2022-07-13 21:59:06,895 INFO L186 Difference]: Start difference. First operand has 908 places, 837 transitions, 1819 flow. Second operand 3 states and 2477 transitions. [2022-07-13 21:59:06,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 899 places, 841 transitions, 1907 flow [2022-07-13 21:59:06,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 899 places, 841 transitions, 1907 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:59:06,903 INFO L242 Difference]: Finished difference. Result has 900 places, 838 transitions, 1831 flow [2022-07-13 21:59:06,903 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} [2022-07-13 21:59:06,904 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, -8 predicate places. [2022-07-13 21:59:06,904 INFO L495 AbstractCegarLoop]: Abstraction has has 900 places, 838 transitions, 1831 flow [2022-07-13 21:59:06,904 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) [2022-07-13 21:59:06,904 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:06,904 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] [2022-07-13 21:59:06,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-07-13 21:59:06,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:06,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1656216362, now seen corresponding path program 1 times [2022-07-13 21:59:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:06,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677976395] [2022-07-13 21:59:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:06,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:06,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677976395] [2022-07-13 21:59:06,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677976395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:06,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214439440] [2022-07-13 21:59:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:06,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:06,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:06,930 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) [2022-07-13 21:59:06,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-07-13 21:59:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:07,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:59:07,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:07,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:07,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214439440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:07,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:07,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:59:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316512089] [2022-07-13 21:59:07,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:59:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:59:07,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:59:07,612 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-13 21:59:07,615 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) [2022-07-13 21:59:07,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:07,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-13 21:59:07,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:08,311 INFO L129 PetriNetUnfolder]: 0/1379 cut-off events. [2022-07-13 21:59:08,311 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-13 21:59:08,311 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. [2022-07-13 21:59:08,314 INFO L132 encePairwiseOnDemand]: 1021/1027 looper letters, 39 selfloop transitions, 9 changer transitions 0/848 dead transitions. [2022-07-13 21:59:08,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 848 transitions, 1949 flow [2022-07-13 21:59:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:59:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:59:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7349 transitions. [2022-07-13 21:59:08,318 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7950881748350103 [2022-07-13 21:59:08,318 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7349 transitions. [2022-07-13 21:59:08,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7349 transitions. [2022-07-13 21:59:08,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:08,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7349 transitions. [2022-07-13 21:59:08,323 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) [2022-07-13 21:59:08,326 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) [2022-07-13 21:59:08,327 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) [2022-07-13 21:59:08,327 INFO L186 Difference]: Start difference. First operand has 900 places, 838 transitions, 1831 flow. Second operand 9 states and 7349 transitions. [2022-07-13 21:59:08,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 848 transitions, 1949 flow [2022-07-13 21:59:08,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 907 places, 848 transitions, 1947 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:08,337 INFO L242 Difference]: Finished difference. Result has 910 places, 844 transitions, 1879 flow [2022-07-13 21:59:08,337 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} [2022-07-13 21:59:08,338 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 2 predicate places. [2022-07-13 21:59:08,338 INFO L495 AbstractCegarLoop]: Abstraction has has 910 places, 844 transitions, 1879 flow [2022-07-13 21:59:08,338 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) [2022-07-13 21:59:08,339 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:08,339 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] [2022-07-13 21:59:08,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:08,552 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 [2022-07-13 21:59:08,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:08,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:08,553 INFO L85 PathProgramCache]: Analyzing trace with hash 37331713, now seen corresponding path program 1 times [2022-07-13 21:59:08,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:08,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100443899] [2022-07-13 21:59:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:08,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:08,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:08,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100443899] [2022-07-13 21:59:08,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100443899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:08,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27056218] [2022-07-13 21:59:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:08,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:08,596 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) [2022-07-13 21:59:08,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-07-13 21:59:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:09,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:59:09,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:09,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:09,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27056218] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:09,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:09,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:59:09,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481440636] [2022-07-13 21:59:09,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:09,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:59:09,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:09,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:59:09,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:59:09,373 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-13 21:59:09,377 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) [2022-07-13 21:59:09,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:09,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-13 21:59:09,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:10,311 INFO L129 PetriNetUnfolder]: 0/1335 cut-off events. [2022-07-13 21:59:10,312 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-13 21:59:10,312 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. [2022-07-13 21:59:10,314 INFO L132 encePairwiseOnDemand]: 1021/1027 looper letters, 47 selfloop transitions, 21 changer transitions 0/868 dead transitions. [2022-07-13 21:59:10,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 868 transitions, 2123 flow [2022-07-13 21:59:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:59:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:59:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17103 transitions. [2022-07-13 21:59:10,322 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930171094728057 [2022-07-13 21:59:10,323 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17103 transitions. [2022-07-13 21:59:10,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17103 transitions. [2022-07-13 21:59:10,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:10,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17103 transitions. [2022-07-13 21:59:10,336 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) [2022-07-13 21:59:10,347 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) [2022-07-13 21:59:10,350 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) [2022-07-13 21:59:10,350 INFO L186 Difference]: Start difference. First operand has 910 places, 844 transitions, 1879 flow. Second operand 21 states and 17103 transitions. [2022-07-13 21:59:10,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 868 transitions, 2123 flow [2022-07-13 21:59:10,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 868 transitions, 2109 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:10,359 INFO L242 Difference]: Finished difference. Result has 934 places, 857 transitions, 2003 flow [2022-07-13 21:59:10,360 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} [2022-07-13 21:59:10,361 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 26 predicate places. [2022-07-13 21:59:10,361 INFO L495 AbstractCegarLoop]: Abstraction has has 934 places, 857 transitions, 2003 flow [2022-07-13 21:59:10,362 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) [2022-07-13 21:59:10,363 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:10,363 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:10,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:10,579 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 [2022-07-13 21:59:10,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:10,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2036581219, now seen corresponding path program 1 times [2022-07-13 21:59:10,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:10,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052233490] [2022-07-13 21:59:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:10,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:10,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:10,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052233490] [2022-07-13 21:59:10,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052233490] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:10,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668510717] [2022-07-13 21:59:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:10,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:10,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:10,675 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) [2022-07-13 21:59:10,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-07-13 21:59:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:11,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:59:11,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:11,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:11,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668510717] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:11,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:11,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:59:11,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985398845] [2022-07-13 21:59:11,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:11,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:59:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:59:11,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:59:11,707 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-13 21:59:11,714 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) [2022-07-13 21:59:11,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:11,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-13 21:59:11,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:12,776 INFO L129 PetriNetUnfolder]: 0/1247 cut-off events. [2022-07-13 21:59:12,777 INFO L130 PetriNetUnfolder]: For 654/654 co-relation queries the response was YES. [2022-07-13 21:59:12,777 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. [2022-07-13 21:59:12,779 INFO L132 encePairwiseOnDemand]: 1021/1027 looper letters, 63 selfloop transitions, 45 changer transitions 0/908 dead transitions. [2022-07-13 21:59:12,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 908 transitions, 2535 flow [2022-07-13 21:59:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:59:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:59:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 36611 transitions. [2022-07-13 21:59:12,794 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921886833279238 [2022-07-13 21:59:12,794 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 36611 transitions. [2022-07-13 21:59:12,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 36611 transitions. [2022-07-13 21:59:12,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:12,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 36611 transitions. [2022-07-13 21:59:12,820 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) [2022-07-13 21:59:12,843 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) [2022-07-13 21:59:12,850 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) [2022-07-13 21:59:12,850 INFO L186 Difference]: Start difference. First operand has 934 places, 857 transitions, 2003 flow. Second operand 45 states and 36611 transitions. [2022-07-13 21:59:12,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 908 transitions, 2535 flow [2022-07-13 21:59:12,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 972 places, 908 transitions, 2495 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:59:12,862 INFO L242 Difference]: Finished difference. Result has 981 places, 882 transitions, 2281 flow [2022-07-13 21:59:12,863 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} [2022-07-13 21:59:12,863 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 73 predicate places. [2022-07-13 21:59:12,863 INFO L495 AbstractCegarLoop]: Abstraction has has 981 places, 882 transitions, 2281 flow [2022-07-13 21:59:12,865 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) [2022-07-13 21:59:12,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:12,866 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:12,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:13,085 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 [2022-07-13 21:59:13,086 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash -517014441, now seen corresponding path program 1 times [2022-07-13 21:59:13,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:13,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303086164] [2022-07-13 21:59:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:13,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:13,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:13,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303086164] [2022-07-13 21:59:13,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303086164] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:13,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774185014] [2022-07-13 21:59:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:13,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:13,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:13,380 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) [2022-07-13 21:59:13,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-07-13 21:59:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:14,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:59:14,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:14,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:14,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774185014] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:14,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:14,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:59:14,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641851946] [2022-07-13 21:59:14,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:14,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:59:14,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:59:14,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:59:14,656 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-07-13 21:59:14,671 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) [2022-07-13 21:59:14,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:14,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-07-13 21:59:14,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:16,150 INFO L129 PetriNetUnfolder]: 0/1082 cut-off events. [2022-07-13 21:59:16,150 INFO L130 PetriNetUnfolder]: For 1982/1982 co-relation queries the response was YES. [2022-07-13 21:59:16,150 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. [2022-07-13 21:59:16,152 INFO L132 encePairwiseOnDemand]: 1022/1027 looper letters, 90 selfloop transitions, 88 changer transitions 0/968 dead transitions. [2022-07-13 21:59:16,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 968 transitions, 3347 flow [2022-07-13 21:59:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-13 21:59:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-07-13 21:59:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 73183 transitions. [2022-07-13 21:59:16,179 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7917667423996538 [2022-07-13 21:59:16,179 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 73183 transitions. [2022-07-13 21:59:16,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 73183 transitions. [2022-07-13 21:59:16,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:16,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 73183 transitions. [2022-07-13 21:59:16,231 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) [2022-07-13 21:59:16,278 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) [2022-07-13 21:59:16,293 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) [2022-07-13 21:59:16,293 INFO L186 Difference]: Start difference. First operand has 981 places, 882 transitions, 2281 flow. Second operand 90 states and 73183 transitions. [2022-07-13 21:59:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 968 transitions, 3347 flow [2022-07-13 21:59:16,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1026 places, 968 transitions, 3106 flow, removed 24 selfloop flow, removed 33 redundant places. [2022-07-13 21:59:16,306 INFO L242 Difference]: Finished difference. Result has 1026 places, 913 transitions, 2615 flow [2022-07-13 21:59:16,306 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} [2022-07-13 21:59:16,307 INFO L279 CegarLoopForPetriNet]: 908 programPoint places, 118 predicate places. [2022-07-13 21:59:16,307 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 913 transitions, 2615 flow [2022-07-13 21:59:16,312 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) [2022-07-13 21:59:16,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:16,313 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] [2022-07-13 21:59:16,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-07-13 21:59:16,527 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 [2022-07-13 21:59:16,527 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1024905612, now seen corresponding path program 1 times [2022-07-13 21:59:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162289680] [2022-07-13 21:59:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:59:16,563 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:59:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:59:16,619 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:59:16,619 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:59:16,619 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:59:16,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:59:16,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-07-13 21:59:16,620 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:16,620 WARN L231 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:59:16,620 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2022-07-13 21:59:16,667 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:59:16,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 937 places, 1060 transitions, 3140 flow [2022-07-13 21:59:17,470 INFO L129 PetriNetUnfolder]: 304/2135 cut-off events. [2022-07-13 21:59:17,471 INFO L130 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2022-07-13 21:59:17,638 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. [2022-07-13 21:59:17,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 937 places, 1060 transitions, 3140 flow [2022-07-13 21:59:17,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 937 places, 1060 transitions, 3140 flow [2022-07-13 21:59:17,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:59:17,709 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:59:17,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:59:17,712 INFO L129 PetriNetUnfolder]: 5/82 cut-off events. [2022-07-13 21:59:17,712 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:59:17,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:17,712 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] [2022-07-13 21:59:17,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:17,713 INFO L85 PathProgramCache]: Analyzing trace with hash 460498338, now seen corresponding path program 1 times [2022-07-13 21:59:17,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:17,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850603350] [2022-07-13 21:59:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:17,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:17,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:17,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850603350] [2022-07-13 21:59:17,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850603350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:17,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:17,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:59:17,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681080008] [2022-07-13 21:59:17,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:17,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:59:17,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:17,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:59:17,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:59:17,733 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 838 out of 1060 [2022-07-13 21:59:17,734 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) [2022-07-13 21:59:17,734 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:17,734 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 838 of 1060 [2022-07-13 21:59:17,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:18,602 INFO L129 PetriNetUnfolder]: 0/1778 cut-off events. [2022-07-13 21:59:18,602 INFO L130 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2022-07-13 21:59:18,602 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. [2022-07-13 21:59:18,605 INFO L132 encePairwiseOnDemand]: 873/1060 looper letters, 39 selfloop transitions, 2 changer transitions 11/879 dead transitions. [2022-07-13 21:59:18,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 938 places, 879 transitions, 2860 flow [2022-07-13 21:59:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:59:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:59:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2747 transitions. [2022-07-13 21:59:18,607 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8638364779874214 [2022-07-13 21:59:18,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2747 transitions. [2022-07-13 21:59:18,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2747 transitions. [2022-07-13 21:59:18,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:18,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2747 transitions. [2022-07-13 21:59:18,609 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) [2022-07-13 21:59:18,610 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) [2022-07-13 21:59:18,611 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) [2022-07-13 21:59:18,611 INFO L186 Difference]: Start difference. First operand has 937 places, 1060 transitions, 3140 flow. Second operand 3 states and 2747 transitions. [2022-07-13 21:59:18,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 938 places, 879 transitions, 2860 flow [2022-07-13 21:59:18,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 938 places, 879 transitions, 1990 flow, removed 435 selfloop flow, removed 0 redundant places. [2022-07-13 21:59:18,624 INFO L242 Difference]: Finished difference. Result has 939 places, 865 transitions, 1890 flow [2022-07-13 21:59:18,624 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} [2022-07-13 21:59:18,625 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 2 predicate places. [2022-07-13 21:59:18,625 INFO L495 AbstractCegarLoop]: Abstraction has has 939 places, 865 transitions, 1890 flow [2022-07-13 21:59:18,625 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) [2022-07-13 21:59:18,625 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:18,625 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:18,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-07-13 21:59:18,626 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:18,626 INFO L85 PathProgramCache]: Analyzing trace with hash 293404278, now seen corresponding path program 1 times [2022-07-13 21:59:18,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:18,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192598072] [2022-07-13 21:59:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:18,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:18,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:18,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192598072] [2022-07-13 21:59:18,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192598072] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:18,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149767204] [2022-07-13 21:59:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:18,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:18,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:18,658 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) [2022-07-13 21:59:18,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-07-13 21:59:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:19,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:59:19,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:19,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:19,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149767204] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:19,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:19,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:59:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564239883] [2022-07-13 21:59:19,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:19,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:59:19,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:59:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:59:19,399 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-13 21:59:19,401 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) [2022-07-13 21:59:19,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:19,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-13 21:59:19,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:20,140 INFO L129 PetriNetUnfolder]: 0/1426 cut-off events. [2022-07-13 21:59:20,140 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-07-13 21:59:20,141 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. [2022-07-13 21:59:20,146 INFO L132 encePairwiseOnDemand]: 1054/1060 looper letters, 40 selfloop transitions, 9 changer transitions 0/875 dead transitions. [2022-07-13 21:59:20,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 936 places, 875 transitions, 2010 flow [2022-07-13 21:59:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:59:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:59:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7584 transitions. [2022-07-13 21:59:20,161 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7949685534591195 [2022-07-13 21:59:20,179 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7584 transitions. [2022-07-13 21:59:20,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7584 transitions. [2022-07-13 21:59:20,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:20,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7584 transitions. [2022-07-13 21:59:20,185 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) [2022-07-13 21:59:20,189 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) [2022-07-13 21:59:20,189 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) [2022-07-13 21:59:20,190 INFO L186 Difference]: Start difference. First operand has 939 places, 865 transitions, 1890 flow. Second operand 9 states and 7584 transitions. [2022-07-13 21:59:20,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 936 places, 875 transitions, 2010 flow [2022-07-13 21:59:20,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 935 places, 875 transitions, 2008 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:20,212 INFO L242 Difference]: Finished difference. Result has 938 places, 871 transitions, 1938 flow [2022-07-13 21:59:20,213 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} [2022-07-13 21:59:20,213 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 1 predicate places. [2022-07-13 21:59:20,213 INFO L495 AbstractCegarLoop]: Abstraction has has 938 places, 871 transitions, 1938 flow [2022-07-13 21:59:20,214 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) [2022-07-13 21:59:20,214 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:20,214 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:20,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:20,429 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 [2022-07-13 21:59:20,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:20,430 INFO L85 PathProgramCache]: Analyzing trace with hash -660876831, now seen corresponding path program 1 times [2022-07-13 21:59:20,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:20,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139244141] [2022-07-13 21:59:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:20,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:20,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:20,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139244141] [2022-07-13 21:59:20,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139244141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:20,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613632141] [2022-07-13 21:59:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:20,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:20,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:20,474 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) [2022-07-13 21:59:20,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-07-13 21:59:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:21,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:59:21,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:21,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:21,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613632141] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:21,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:21,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:59:21,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825095663] [2022-07-13 21:59:21,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:21,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:59:21,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:59:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:59:21,349 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-13 21:59:21,353 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) [2022-07-13 21:59:21,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:21,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-13 21:59:21,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:22,160 INFO L129 PetriNetUnfolder]: 0/1382 cut-off events. [2022-07-13 21:59:22,160 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-13 21:59:22,160 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. [2022-07-13 21:59:22,163 INFO L132 encePairwiseOnDemand]: 1054/1060 looper letters, 48 selfloop transitions, 21 changer transitions 0/895 dead transitions. [2022-07-13 21:59:22,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 958 places, 895 transitions, 2184 flow [2022-07-13 21:59:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:59:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:59:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17650 transitions. [2022-07-13 21:59:22,170 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7929020664869721 [2022-07-13 21:59:22,171 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17650 transitions. [2022-07-13 21:59:22,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17650 transitions. [2022-07-13 21:59:22,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:22,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17650 transitions. [2022-07-13 21:59:22,182 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) [2022-07-13 21:59:22,192 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) [2022-07-13 21:59:22,194 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) [2022-07-13 21:59:22,194 INFO L186 Difference]: Start difference. First operand has 938 places, 871 transitions, 1938 flow. Second operand 21 states and 17650 transitions. [2022-07-13 21:59:22,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 958 places, 895 transitions, 2184 flow [2022-07-13 21:59:22,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 957 places, 895 transitions, 2170 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:22,203 INFO L242 Difference]: Finished difference. Result has 962 places, 884 transitions, 2062 flow [2022-07-13 21:59:22,204 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} [2022-07-13 21:59:22,204 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 25 predicate places. [2022-07-13 21:59:22,204 INFO L495 AbstractCegarLoop]: Abstraction has has 962 places, 884 transitions, 2062 flow [2022-07-13 21:59:22,206 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) [2022-07-13 21:59:22,206 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:22,206 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] [2022-07-13 21:59:22,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:22,419 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 [2022-07-13 21:59:22,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash 280181955, now seen corresponding path program 1 times [2022-07-13 21:59:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:22,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780287710] [2022-07-13 21:59:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:22,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:22,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:22,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780287710] [2022-07-13 21:59:22,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780287710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:22,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526443338] [2022-07-13 21:59:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:22,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:22,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:22,529 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) [2022-07-13 21:59:22,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-07-13 21:59:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:23,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:59:23,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:23,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:23,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526443338] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:23,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:23,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:59:23,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107178032] [2022-07-13 21:59:23,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:23,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:59:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:23,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:59:23,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:59:23,514 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-13 21:59:23,522 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) [2022-07-13 21:59:23,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:23,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-13 21:59:23,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:24,502 INFO L129 PetriNetUnfolder]: 0/1294 cut-off events. [2022-07-13 21:59:24,502 INFO L130 PetriNetUnfolder]: For 681/681 co-relation queries the response was YES. [2022-07-13 21:59:24,502 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. [2022-07-13 21:59:24,505 INFO L132 encePairwiseOnDemand]: 1054/1060 looper letters, 64 selfloop transitions, 45 changer transitions 0/935 dead transitions. [2022-07-13 21:59:24,505 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 935 transitions, 2596 flow [2022-07-13 21:59:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:59:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:59:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 37782 transitions. [2022-07-13 21:59:24,520 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7920754716981132 [2022-07-13 21:59:24,520 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 37782 transitions. [2022-07-13 21:59:24,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 37782 transitions. [2022-07-13 21:59:24,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:24,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 37782 transitions. [2022-07-13 21:59:24,547 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) [2022-07-13 21:59:24,570 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) [2022-07-13 21:59:24,575 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) [2022-07-13 21:59:24,575 INFO L186 Difference]: Start difference. First operand has 962 places, 884 transitions, 2062 flow. Second operand 45 states and 37782 transitions. [2022-07-13 21:59:24,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 935 transitions, 2596 flow [2022-07-13 21:59:24,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1000 places, 935 transitions, 2556 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:59:24,588 INFO L242 Difference]: Finished difference. Result has 1009 places, 909 transitions, 2340 flow [2022-07-13 21:59:24,588 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} [2022-07-13 21:59:24,588 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 72 predicate places. [2022-07-13 21:59:24,588 INFO L495 AbstractCegarLoop]: Abstraction has has 1009 places, 909 transitions, 2340 flow [2022-07-13 21:59:24,590 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) [2022-07-13 21:59:24,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:24,591 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] [2022-07-13 21:59:24,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-07-13 21:59:24,810 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 [2022-07-13 21:59:24,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:24,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1399032503, now seen corresponding path program 1 times [2022-07-13 21:59:24,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:24,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498734505] [2022-07-13 21:59:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:24,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:25,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:25,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498734505] [2022-07-13 21:59:25,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498734505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:25,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622882981] [2022-07-13 21:59:25,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:25,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:25,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:25,144 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) [2022-07-13 21:59:25,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-07-13 21:59:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:25,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:59:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:26,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:26,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622882981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:26,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:26,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:59:26,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959719756] [2022-07-13 21:59:26,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:26,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:59:26,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:26,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:59:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:59:26,723 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-07-13 21:59:26,738 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) [2022-07-13 21:59:26,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:26,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-07-13 21:59:26,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:28,706 INFO L129 PetriNetUnfolder]: 0/1118 cut-off events. [2022-07-13 21:59:28,707 INFO L130 PetriNetUnfolder]: For 2103/2103 co-relation queries the response was YES. [2022-07-13 21:59:28,707 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. [2022-07-13 21:59:28,709 INFO L132 encePairwiseOnDemand]: 1055/1060 looper letters, 93 selfloop transitions, 91 changer transitions 0/1000 dead transitions. [2022-07-13 21:59:28,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1090 places, 1000 transitions, 3462 flow [2022-07-13 21:59:28,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-13 21:59:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-13 21:59:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 78041 transitions. [2022-07-13 21:59:28,739 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916514505984987 [2022-07-13 21:59:28,740 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 78041 transitions. [2022-07-13 21:59:28,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 78041 transitions. [2022-07-13 21:59:28,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:28,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 78041 transitions. [2022-07-13 21:59:28,796 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) [2022-07-13 21:59:28,847 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) [2022-07-13 21:59:28,863 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) [2022-07-13 21:59:28,863 INFO L186 Difference]: Start difference. First operand has 1009 places, 909 transitions, 2340 flow. Second operand 93 states and 78041 transitions. [2022-07-13 21:59:28,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1090 places, 1000 transitions, 3462 flow [2022-07-13 21:59:28,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1057 places, 1000 transitions, 3213 flow, removed 25 selfloop flow, removed 33 redundant places. [2022-07-13 21:59:28,876 INFO L242 Difference]: Finished difference. Result has 1057 places, 943 transitions, 2703 flow [2022-07-13 21:59:28,877 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} [2022-07-13 21:59:28,877 INFO L279 CegarLoopForPetriNet]: 937 programPoint places, 120 predicate places. [2022-07-13 21:59:28,877 INFO L495 AbstractCegarLoop]: Abstraction has has 1057 places, 943 transitions, 2703 flow [2022-07-13 21:59:28,882 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) [2022-07-13 21:59:28,882 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:28,882 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] [2022-07-13 21:59:28,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-07-13 21:59:29,100 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 [2022-07-13 21:59:29,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1478585189, now seen corresponding path program 1 times [2022-07-13 21:59:29,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:29,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091876716] [2022-07-13 21:59:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:59:29,140 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:59:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:59:29,200 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:59:29,200 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:59:29,200 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:59:29,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:59:29,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-07-13 21:59:29,201 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:59:29,201 WARN L231 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:59:29,201 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2022-07-13 21:59:29,249 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:59:29,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 966 places, 1093 transitions, 3271 flow [2022-07-13 21:59:30,130 INFO L129 PetriNetUnfolder]: 314/2204 cut-off events. [2022-07-13 21:59:30,130 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-13 21:59:30,260 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. [2022-07-13 21:59:30,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 966 places, 1093 transitions, 3271 flow [2022-07-13 21:59:30,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 966 places, 1093 transitions, 3271 flow [2022-07-13 21:59:30,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:59:30,316 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:59:30,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:59:30,319 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2022-07-13 21:59:30,320 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:59:30,320 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:30,320 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:30,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash 58051426, now seen corresponding path program 1 times [2022-07-13 21:59:30,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:30,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919286082] [2022-07-13 21:59:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:30,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:30,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:30,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919286082] [2022-07-13 21:59:30,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919286082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:30,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:30,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:59:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185043475] [2022-07-13 21:59:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:30,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:59:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:59:30,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:59:30,341 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 864 out of 1093 [2022-07-13 21:59:30,342 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) [2022-07-13 21:59:30,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:30,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 864 of 1093 [2022-07-13 21:59:30,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:31,318 INFO L129 PetriNetUnfolder]: 0/1836 cut-off events. [2022-07-13 21:59:31,318 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-13 21:59:31,319 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. [2022-07-13 21:59:31,321 INFO L132 encePairwiseOnDemand]: 900/1093 looper letters, 40 selfloop transitions, 2 changer transitions 11/906 dead transitions. [2022-07-13 21:59:31,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 906 transitions, 2981 flow [2022-07-13 21:59:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:59:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:59:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2832 transitions. [2022-07-13 21:59:31,323 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8636779505946935 [2022-07-13 21:59:31,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2832 transitions. [2022-07-13 21:59:31,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2832 transitions. [2022-07-13 21:59:31,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:31,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2832 transitions. [2022-07-13 21:59:31,326 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) [2022-07-13 21:59:31,327 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) [2022-07-13 21:59:31,327 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) [2022-07-13 21:59:31,328 INFO L186 Difference]: Start difference. First operand has 966 places, 1093 transitions, 3271 flow. Second operand 3 states and 2832 transitions. [2022-07-13 21:59:31,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 906 transitions, 2981 flow [2022-07-13 21:59:31,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 967 places, 906 transitions, 2051 flow, removed 465 selfloop flow, removed 0 redundant places. [2022-07-13 21:59:31,342 INFO L242 Difference]: Finished difference. Result has 968 places, 892 transitions, 1949 flow [2022-07-13 21:59:31,342 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} [2022-07-13 21:59:31,343 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 2 predicate places. [2022-07-13 21:59:31,343 INFO L495 AbstractCegarLoop]: Abstraction has has 968 places, 892 transitions, 1949 flow [2022-07-13 21:59:31,343 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) [2022-07-13 21:59:31,343 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:31,343 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] [2022-07-13 21:59:31,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-07-13 21:59:31,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:31,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash -859713674, now seen corresponding path program 1 times [2022-07-13 21:59:31,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:31,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529107650] [2022-07-13 21:59:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:31,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:31,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:31,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529107650] [2022-07-13 21:59:31,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529107650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:31,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419754003] [2022-07-13 21:59:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:31,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:31,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:31,371 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) [2022-07-13 21:59:31,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-07-13 21:59:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:32,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:59:32,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:32,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:32,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419754003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:32,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:32,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:59:32,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643182433] [2022-07-13 21:59:32,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:32,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:59:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:59:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:59:32,180 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-13 21:59:32,182 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) [2022-07-13 21:59:32,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:32,182 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-13 21:59:32,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:32,959 INFO L129 PetriNetUnfolder]: 0/1473 cut-off events. [2022-07-13 21:59:32,959 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-13 21:59:32,959 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. [2022-07-13 21:59:32,962 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 41 selfloop transitions, 9 changer transitions 0/902 dead transitions. [2022-07-13 21:59:32,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 965 places, 902 transitions, 2071 flow [2022-07-13 21:59:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:59:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:59:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7819 transitions. [2022-07-13 21:59:32,965 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7948561553319101 [2022-07-13 21:59:32,965 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7819 transitions. [2022-07-13 21:59:32,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7819 transitions. [2022-07-13 21:59:32,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:32,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7819 transitions. [2022-07-13 21:59:32,971 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) [2022-07-13 21:59:32,974 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) [2022-07-13 21:59:32,975 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) [2022-07-13 21:59:32,975 INFO L186 Difference]: Start difference. First operand has 968 places, 892 transitions, 1949 flow. Second operand 9 states and 7819 transitions. [2022-07-13 21:59:32,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 965 places, 902 transitions, 2071 flow [2022-07-13 21:59:32,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 964 places, 902 transitions, 2069 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:32,984 INFO L242 Difference]: Finished difference. Result has 967 places, 898 transitions, 1997 flow [2022-07-13 21:59:32,984 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} [2022-07-13 21:59:32,985 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 1 predicate places. [2022-07-13 21:59:32,985 INFO L495 AbstractCegarLoop]: Abstraction has has 967 places, 898 transitions, 1997 flow [2022-07-13 21:59:32,986 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) [2022-07-13 21:59:32,986 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:32,986 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] [2022-07-13 21:59:33,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:33,199 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 [2022-07-13 21:59:33,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:33,200 INFO L85 PathProgramCache]: Analyzing trace with hash 24168801, now seen corresponding path program 1 times [2022-07-13 21:59:33,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:33,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158861780] [2022-07-13 21:59:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:33,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:33,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:33,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158861780] [2022-07-13 21:59:33,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158861780] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:33,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555066227] [2022-07-13 21:59:33,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:33,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:33,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:33,245 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) [2022-07-13 21:59:33,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-07-13 21:59:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:59:33,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:34,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:34,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555066227] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:34,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:34,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:59:34,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846076677] [2022-07-13 21:59:34,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:34,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:59:34,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:59:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:59:34,081 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-13 21:59:34,084 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) [2022-07-13 21:59:34,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:34,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-13 21:59:34,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:34,890 INFO L129 PetriNetUnfolder]: 0/1429 cut-off events. [2022-07-13 21:59:34,890 INFO L130 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-07-13 21:59:34,890 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. [2022-07-13 21:59:34,893 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 49 selfloop transitions, 21 changer transitions 0/922 dead transitions. [2022-07-13 21:59:34,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 987 places, 922 transitions, 2245 flow [2022-07-13 21:59:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:59:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:59:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18197 transitions. [2022-07-13 21:59:34,900 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927939702871084 [2022-07-13 21:59:34,900 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18197 transitions. [2022-07-13 21:59:34,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18197 transitions. [2022-07-13 21:59:34,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:34,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18197 transitions. [2022-07-13 21:59:34,912 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) [2022-07-13 21:59:34,921 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) [2022-07-13 21:59:34,923 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) [2022-07-13 21:59:34,923 INFO L186 Difference]: Start difference. First operand has 967 places, 898 transitions, 1997 flow. Second operand 21 states and 18197 transitions. [2022-07-13 21:59:34,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 987 places, 922 transitions, 2245 flow [2022-07-13 21:59:34,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 986 places, 922 transitions, 2231 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:34,934 INFO L242 Difference]: Finished difference. Result has 991 places, 911 transitions, 2121 flow [2022-07-13 21:59:34,934 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} [2022-07-13 21:59:34,934 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 25 predicate places. [2022-07-13 21:59:34,935 INFO L495 AbstractCegarLoop]: Abstraction has has 991 places, 911 transitions, 2121 flow [2022-07-13 21:59:34,936 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) [2022-07-13 21:59:34,936 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:34,936 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] [2022-07-13 21:59:34,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:35,138 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 [2022-07-13 21:59:35,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:35,139 INFO L85 PathProgramCache]: Analyzing trace with hash -200556221, now seen corresponding path program 1 times [2022-07-13 21:59:35,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:35,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676924860] [2022-07-13 21:59:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:35,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:35,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676924860] [2022-07-13 21:59:35,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676924860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475207466] [2022-07-13 21:59:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:35,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:35,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:35,225 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) [2022-07-13 21:59:35,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-07-13 21:59:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:59:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:36,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:36,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475207466] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:36,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:36,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:59:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608142236] [2022-07-13 21:59:36,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:36,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:59:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:36,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:59:36,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:59:36,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-13 21:59:36,294 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) [2022-07-13 21:59:36,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:36,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-13 21:59:36,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:37,515 INFO L129 PetriNetUnfolder]: 0/1341 cut-off events. [2022-07-13 21:59:37,515 INFO L130 PetriNetUnfolder]: For 708/708 co-relation queries the response was YES. [2022-07-13 21:59:37,516 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. [2022-07-13 21:59:37,518 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 65 selfloop transitions, 45 changer transitions 0/962 dead transitions. [2022-07-13 21:59:37,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 962 transitions, 2657 flow [2022-07-13 21:59:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:59:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:59:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 38953 transitions. [2022-07-13 21:59:37,534 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7919690962691878 [2022-07-13 21:59:37,534 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 38953 transitions. [2022-07-13 21:59:37,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 38953 transitions. [2022-07-13 21:59:37,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:37,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 38953 transitions. [2022-07-13 21:59:37,562 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) [2022-07-13 21:59:37,588 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) [2022-07-13 21:59:37,597 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) [2022-07-13 21:59:37,597 INFO L186 Difference]: Start difference. First operand has 991 places, 911 transitions, 2121 flow. Second operand 45 states and 38953 transitions. [2022-07-13 21:59:37,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 962 transitions, 2657 flow [2022-07-13 21:59:37,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1029 places, 962 transitions, 2617 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:59:37,610 INFO L242 Difference]: Finished difference. Result has 1038 places, 936 transitions, 2399 flow [2022-07-13 21:59:37,611 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} [2022-07-13 21:59:37,611 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 72 predicate places. [2022-07-13 21:59:37,611 INFO L495 AbstractCegarLoop]: Abstraction has has 1038 places, 936 transitions, 2399 flow [2022-07-13 21:59:37,614 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) [2022-07-13 21:59:37,614 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:37,614 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] [2022-07-13 21:59:37,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:37,839 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 [2022-07-13 21:59:37,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1160763081, now seen corresponding path program 1 times [2022-07-13 21:59:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:37,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161220805] [2022-07-13 21:59:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:37,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:38,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:38,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161220805] [2022-07-13 21:59:38,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161220805] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:38,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818256266] [2022-07-13 21:59:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:38,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:38,107 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) [2022-07-13 21:59:38,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-07-13 21:59:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:59:38,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:39,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:39,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818256266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:39,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:39,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:59:39,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537809314] [2022-07-13 21:59:39,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:39,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:59:39,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:59:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:59:39,744 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-07-13 21:59:39,761 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) [2022-07-13 21:59:39,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:39,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-07-13 21:59:39,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:41,671 INFO L129 PetriNetUnfolder]: 0/1165 cut-off events. [2022-07-13 21:59:41,671 INFO L130 PetriNetUnfolder]: For 2224/2224 co-relation queries the response was YES. [2022-07-13 21:59:41,672 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. [2022-07-13 21:59:41,673 INFO L132 encePairwiseOnDemand]: 1087/1093 looper letters, 97 selfloop transitions, 93 changer transitions 0/1042 dead transitions. [2022-07-13 21:59:41,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1130 places, 1042 transitions, 3627 flow [2022-07-13 21:59:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-13 21:59:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-13 21:59:41,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 80465 transitions. [2022-07-13 21:59:41,703 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.791596572519159 [2022-07-13 21:59:41,703 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 80465 transitions. [2022-07-13 21:59:41,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 80465 transitions. [2022-07-13 21:59:41,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:41,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 80465 transitions. [2022-07-13 21:59:41,760 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) [2022-07-13 21:59:41,814 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) [2022-07-13 21:59:41,831 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) [2022-07-13 21:59:41,831 INFO L186 Difference]: Start difference. First operand has 1038 places, 936 transitions, 2399 flow. Second operand 93 states and 80465 transitions. [2022-07-13 21:59:41,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1130 places, 1042 transitions, 3627 flow [2022-07-13 21:59:41,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1112 places, 1042 transitions, 3539 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-13 21:59:41,846 INFO L242 Difference]: Finished difference. Result has 1129 places, 985 transitions, 3033 flow [2022-07-13 21:59:41,846 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} [2022-07-13 21:59:41,847 INFO L279 CegarLoopForPetriNet]: 966 programPoint places, 163 predicate places. [2022-07-13 21:59:41,847 INFO L495 AbstractCegarLoop]: Abstraction has has 1129 places, 985 transitions, 3033 flow [2022-07-13 21:59:41,852 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) [2022-07-13 21:59:41,852 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:41,853 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] [2022-07-13 21:59:41,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-07-13 21:59:42,067 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 [2022-07-13 21:59:42,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:42,068 INFO L85 PathProgramCache]: Analyzing trace with hash 440356055, now seen corresponding path program 1 times [2022-07-13 21:59:42,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:42,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094613611] [2022-07-13 21:59:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:42,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:59:42,116 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:59:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:59:42,195 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:59:42,195 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:59:42,196 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:59:42,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:59:42,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-07-13 21:59:42,196 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 21:59:42,196 WARN L231 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:59:42,196 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2022-07-13 21:59:42,271 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:59:42,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 995 places, 1126 transitions, 3404 flow [2022-07-13 21:59:43,266 INFO L129 PetriNetUnfolder]: 324/2273 cut-off events. [2022-07-13 21:59:43,266 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-13 21:59:43,463 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. [2022-07-13 21:59:43,463 INFO L82 GeneralOperation]: Start removeDead. Operand has 995 places, 1126 transitions, 3404 flow [2022-07-13 21:59:43,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 995 places, 1126 transitions, 3404 flow [2022-07-13 21:59:43,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:59:43,544 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 21:59:43,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:59:43,548 INFO L129 PetriNetUnfolder]: 4/80 cut-off events. [2022-07-13 21:59:43,548 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:59:43,548 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:43,548 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:43,548 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:43,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2079757282, now seen corresponding path program 1 times [2022-07-13 21:59:43,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:43,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382544636] [2022-07-13 21:59:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:43,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:43,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:43,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382544636] [2022-07-13 21:59:43,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382544636] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:43,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:43,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:59:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912040124] [2022-07-13 21:59:43,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:43,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:59:43,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:59:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:59:43,572 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 890 out of 1126 [2022-07-13 21:59:43,573 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) [2022-07-13 21:59:43,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:43,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 890 of 1126 [2022-07-13 21:59:43,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:44,595 INFO L129 PetriNetUnfolder]: 0/1894 cut-off events. [2022-07-13 21:59:44,596 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-13 21:59:44,596 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. [2022-07-13 21:59:44,599 INFO L132 encePairwiseOnDemand]: 927/1126 looper letters, 41 selfloop transitions, 2 changer transitions 11/933 dead transitions. [2022-07-13 21:59:44,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 933 transitions, 3104 flow [2022-07-13 21:59:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:59:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:59:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2917 transitions. [2022-07-13 21:59:44,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8635287152161042 [2022-07-13 21:59:44,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2917 transitions. [2022-07-13 21:59:44,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2917 transitions. [2022-07-13 21:59:44,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:44,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2917 transitions. [2022-07-13 21:59:44,603 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) [2022-07-13 21:59:44,605 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) [2022-07-13 21:59:44,605 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) [2022-07-13 21:59:44,605 INFO L186 Difference]: Start difference. First operand has 995 places, 1126 transitions, 3404 flow. Second operand 3 states and 2917 transitions. [2022-07-13 21:59:44,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 933 transitions, 3104 flow [2022-07-13 21:59:44,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 996 places, 933 transitions, 2112 flow, removed 496 selfloop flow, removed 0 redundant places. [2022-07-13 21:59:44,620 INFO L242 Difference]: Finished difference. Result has 997 places, 919 transitions, 2008 flow [2022-07-13 21:59:44,620 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} [2022-07-13 21:59:44,620 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 2 predicate places. [2022-07-13 21:59:44,620 INFO L495 AbstractCegarLoop]: Abstraction has has 997 places, 919 transitions, 2008 flow [2022-07-13 21:59:44,621 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) [2022-07-13 21:59:44,621 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:44,621 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] [2022-07-13 21:59:44,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-07-13 21:59:44,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash -820602922, now seen corresponding path program 1 times [2022-07-13 21:59:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840197541] [2022-07-13 21:59:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:44,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:44,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840197541] [2022-07-13 21:59:44,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840197541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567185793] [2022-07-13 21:59:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:44,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:44,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:44,664 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) [2022-07-13 21:59:44,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-07-13 21:59:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:59:45,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:45,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:45,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567185793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:45,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:45,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:59:45,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414380128] [2022-07-13 21:59:45,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:45,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:59:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:59:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:59:45,519 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-13 21:59:45,521 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) [2022-07-13 21:59:45,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:45,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-13 21:59:45,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:46,423 INFO L129 PetriNetUnfolder]: 0/1520 cut-off events. [2022-07-13 21:59:46,424 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-13 21:59:46,424 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. [2022-07-13 21:59:46,426 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 42 selfloop transitions, 9 changer transitions 0/929 dead transitions. [2022-07-13 21:59:46,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 994 places, 929 transitions, 2132 flow [2022-07-13 21:59:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:59:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:59:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8054 transitions. [2022-07-13 21:59:46,430 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7947503453720149 [2022-07-13 21:59:46,430 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8054 transitions. [2022-07-13 21:59:46,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8054 transitions. [2022-07-13 21:59:46,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:46,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8054 transitions. [2022-07-13 21:59:46,435 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) [2022-07-13 21:59:46,439 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) [2022-07-13 21:59:46,440 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) [2022-07-13 21:59:46,440 INFO L186 Difference]: Start difference. First operand has 997 places, 919 transitions, 2008 flow. Second operand 9 states and 8054 transitions. [2022-07-13 21:59:46,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 994 places, 929 transitions, 2132 flow [2022-07-13 21:59:46,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 929 transitions, 2130 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:46,449 INFO L242 Difference]: Finished difference. Result has 996 places, 925 transitions, 2056 flow [2022-07-13 21:59:46,449 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} [2022-07-13 21:59:46,450 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 1 predicate places. [2022-07-13 21:59:46,450 INFO L495 AbstractCegarLoop]: Abstraction has has 996 places, 925 transitions, 2056 flow [2022-07-13 21:59:46,451 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) [2022-07-13 21:59:46,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:46,451 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] [2022-07-13 21:59:46,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-07-13 21:59:46,671 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 [2022-07-13 21:59:46,671 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:46,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2092468609, now seen corresponding path program 1 times [2022-07-13 21:59:46,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:46,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452101075] [2022-07-13 21:59:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:46,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:46,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:46,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452101075] [2022-07-13 21:59:46,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452101075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:46,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410014063] [2022-07-13 21:59:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:46,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:46,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:46,717 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) [2022-07-13 21:59:46,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-07-13 21:59:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:59:47,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:47,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:47,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410014063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:47,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:47,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:59:47,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105459408] [2022-07-13 21:59:47,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:47,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:59:47,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:47,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:59:47,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:59:47,717 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-13 21:59:47,721 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) [2022-07-13 21:59:47,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:47,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-13 21:59:47,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:48,635 INFO L129 PetriNetUnfolder]: 0/1476 cut-off events. [2022-07-13 21:59:48,635 INFO L130 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-07-13 21:59:48,636 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. [2022-07-13 21:59:48,638 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 50 selfloop transitions, 21 changer transitions 0/949 dead transitions. [2022-07-13 21:59:48,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1016 places, 949 transitions, 2306 flow [2022-07-13 21:59:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:59:48,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:59:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18744 transitions. [2022-07-13 21:59:48,646 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926922100989596 [2022-07-13 21:59:48,646 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18744 transitions. [2022-07-13 21:59:48,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18744 transitions. [2022-07-13 21:59:48,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:48,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18744 transitions. [2022-07-13 21:59:48,658 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) [2022-07-13 21:59:48,667 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) [2022-07-13 21:59:48,669 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) [2022-07-13 21:59:48,669 INFO L186 Difference]: Start difference. First operand has 996 places, 925 transitions, 2056 flow. Second operand 21 states and 18744 transitions. [2022-07-13 21:59:48,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1016 places, 949 transitions, 2306 flow [2022-07-13 21:59:48,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1015 places, 949 transitions, 2292 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:59:48,681 INFO L242 Difference]: Finished difference. Result has 1020 places, 938 transitions, 2180 flow [2022-07-13 21:59:48,681 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} [2022-07-13 21:59:48,681 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 25 predicate places. [2022-07-13 21:59:48,682 INFO L495 AbstractCegarLoop]: Abstraction has has 1020 places, 938 transitions, 2180 flow [2022-07-13 21:59:48,683 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) [2022-07-13 21:59:48,683 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:48,683 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] [2022-07-13 21:59:48,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:48,903 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 [2022-07-13 21:59:48,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:48,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:48,904 INFO L85 PathProgramCache]: Analyzing trace with hash 594366691, now seen corresponding path program 1 times [2022-07-13 21:59:48,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:48,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541973652] [2022-07-13 21:59:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:48,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:49,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541973652] [2022-07-13 21:59:49,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541973652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472576672] [2022-07-13 21:59:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:49,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:49,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:49,021 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) [2022-07-13 21:59:49,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-07-13 21:59:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:49,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:59:49,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:49,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:50,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472576672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:50,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:50,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:59:50,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818016655] [2022-07-13 21:59:50,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:50,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:59:50,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:50,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:59:50,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:59:50,159 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-13 21:59:50,167 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) [2022-07-13 21:59:50,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:50,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-13 21:59:50,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:51,238 INFO L129 PetriNetUnfolder]: 0/1388 cut-off events. [2022-07-13 21:59:51,238 INFO L130 PetriNetUnfolder]: For 735/735 co-relation queries the response was YES. [2022-07-13 21:59:51,239 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. [2022-07-13 21:59:51,241 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 66 selfloop transitions, 45 changer transitions 0/989 dead transitions. [2022-07-13 21:59:51,241 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1064 places, 989 transitions, 2718 flow [2022-07-13 21:59:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 21:59:51,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 21:59:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 40124 transitions. [2022-07-13 21:59:51,256 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918689559897375 [2022-07-13 21:59:51,256 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 40124 transitions. [2022-07-13 21:59:51,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 40124 transitions. [2022-07-13 21:59:51,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:51,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 40124 transitions. [2022-07-13 21:59:51,283 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) [2022-07-13 21:59:51,308 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) [2022-07-13 21:59:51,316 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) [2022-07-13 21:59:51,316 INFO L186 Difference]: Start difference. First operand has 1020 places, 938 transitions, 2180 flow. Second operand 45 states and 40124 transitions. [2022-07-13 21:59:51,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1064 places, 989 transitions, 2718 flow [2022-07-13 21:59:51,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1058 places, 989 transitions, 2678 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:59:51,328 INFO L242 Difference]: Finished difference. Result has 1067 places, 963 transitions, 2458 flow [2022-07-13 21:59:51,329 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} [2022-07-13 21:59:51,330 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 72 predicate places. [2022-07-13 21:59:51,331 INFO L495 AbstractCegarLoop]: Abstraction has has 1067 places, 963 transitions, 2458 flow [2022-07-13 21:59:51,333 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) [2022-07-13 21:59:51,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:51,333 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] [2022-07-13 21:59:51,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-07-13 21:59:51,535 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 [2022-07-13 21:59:51,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash 393533399, now seen corresponding path program 1 times [2022-07-13 21:59:51,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:51,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339515484] [2022-07-13 21:59:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:51,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:51,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:51,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339515484] [2022-07-13 21:59:51,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339515484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:51,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710971152] [2022-07-13 21:59:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:51,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:51,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:51,728 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) [2022-07-13 21:59:51,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-07-13 21:59:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:52,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:59:52,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:52,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:53,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710971152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:53,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:53,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:59:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443434717] [2022-07-13 21:59:53,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:53,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:59:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:59:53,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:59:53,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-13 21:59:53,325 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) [2022-07-13 21:59:53,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:53,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-13 21:59:53,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:54,909 INFO L129 PetriNetUnfolder]: 0/1212 cut-off events. [2022-07-13 21:59:54,909 INFO L130 PetriNetUnfolder]: For 2345/2345 co-relation queries the response was YES. [2022-07-13 21:59:54,910 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. [2022-07-13 21:59:54,911 INFO L132 encePairwiseOnDemand]: 1120/1126 looper letters, 98 selfloop transitions, 93 changer transitions 0/1069 dead transitions. [2022-07-13 21:59:54,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1159 places, 1069 transitions, 3688 flow [2022-07-13 21:59:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-13 21:59:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-13 21:59:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 82884 transitions. [2022-07-13 21:59:55,083 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7914971638113791 [2022-07-13 21:59:55,083 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 82884 transitions. [2022-07-13 21:59:55,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 82884 transitions. [2022-07-13 21:59:55,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:55,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 82884 transitions. [2022-07-13 21:59:55,143 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) [2022-07-13 21:59:55,196 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) [2022-07-13 21:59:55,212 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) [2022-07-13 21:59:55,213 INFO L186 Difference]: Start difference. First operand has 1067 places, 963 transitions, 2458 flow. Second operand 93 states and 82884 transitions. [2022-07-13 21:59:55,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1159 places, 1069 transitions, 3688 flow [2022-07-13 21:59:55,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1141 places, 1069 transitions, 3600 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-13 21:59:55,226 INFO L242 Difference]: Finished difference. Result has 1158 places, 1012 transitions, 3092 flow [2022-07-13 21:59:55,226 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} [2022-07-13 21:59:55,227 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 163 predicate places. [2022-07-13 21:59:55,227 INFO L495 AbstractCegarLoop]: Abstraction has has 1158 places, 1012 transitions, 3092 flow [2022-07-13 21:59:55,232 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) [2022-07-13 21:59:55,232 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:55,232 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] [2022-07-13 21:59:55,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:55,433 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 [2022-07-13 21:59:55,433 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:59:55,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:55,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1540818559, now seen corresponding path program 1 times [2022-07-13 21:59:55,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:55,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908868930] [2022-07-13 21:59:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:55,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:56,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:56,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908868930] [2022-07-13 21:59:56,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908868930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580341587] [2022-07-13 21:59:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:56,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:56,106 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) [2022-07-13 21:59:56,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-07-13 21:59:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-13 21:59:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:57,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:58,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580341587] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:58,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:58,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-13 21:59:58,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652665698] [2022-07-13 21:59:58,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:58,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-13 21:59:58,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-13 21:59:58,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-13 21:59:58,733 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-07-13 21:59:58,765 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) [2022-07-13 21:59:58,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:58,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-07-13 21:59:58,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:00,960 INFO L129 PetriNetUnfolder]: 0/1190 cut-off events. [2022-07-13 22:00:00,960 INFO L130 PetriNetUnfolder]: For 1692/1692 co-relation queries the response was YES. [2022-07-13 22:00:00,960 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. [2022-07-13 22:00:00,975 INFO L132 encePairwiseOnDemand]: 1121/1126 looper letters, 99 selfloop transitions, 97 changer transitions 0/1064 dead transitions. [2022-07-13 22:00:00,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1245 places, 1064 transitions, 3872 flow [2022-07-13 22:00:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-13 22:00:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-07-13 22:00:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 88209 transitions. [2022-07-13 22:00:01,017 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912966252220248 [2022-07-13 22:00:01,017 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 88209 transitions. [2022-07-13 22:00:01,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 88209 transitions. [2022-07-13 22:00:01,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:01,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 88209 transitions. [2022-07-13 22:00:01,078 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) [2022-07-13 22:00:01,137 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) [2022-07-13 22:00:01,154 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) [2022-07-13 22:00:01,154 INFO L186 Difference]: Start difference. First operand has 1158 places, 1012 transitions, 3092 flow. Second operand 99 states and 88209 transitions. [2022-07-13 22:00:01,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1245 places, 1064 transitions, 3872 flow [2022-07-13 22:00:01,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1172 places, 1064 transitions, 3540 flow, removed 19 selfloop flow, removed 73 redundant places. [2022-07-13 22:00:01,170 INFO L242 Difference]: Finished difference. Result has 1172 places, 1004 transitions, 2970 flow [2022-07-13 22:00:01,170 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} [2022-07-13 22:00:01,171 INFO L279 CegarLoopForPetriNet]: 995 programPoint places, 177 predicate places. [2022-07-13 22:00:01,171 INFO L495 AbstractCegarLoop]: Abstraction has has 1172 places, 1004 transitions, 2970 flow [2022-07-13 22:00:01,181 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) [2022-07-13 22:00:01,182 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:01,182 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] [2022-07-13 22:00:01,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-07-13 22:00:01,386 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 [2022-07-13 22:00:01,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:01,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:01,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2144471914, now seen corresponding path program 1 times [2022-07-13 22:00:01,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:01,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423673622] [2022-07-13 22:00:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:01,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:00:01,440 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 22:00:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:00:01,507 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 22:00:01,508 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 22:00:01,508 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 22:00:01,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 22:00:01,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-07-13 22:00:01,508 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:01,509 WARN L231 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 22:00:01,509 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2022-07-13 22:00:01,552 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 22:00:01,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1024 places, 1159 transitions, 3539 flow [2022-07-13 22:00:02,567 INFO L129 PetriNetUnfolder]: 334/2342 cut-off events. [2022-07-13 22:00:02,568 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-13 22:00:02,767 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. [2022-07-13 22:00:02,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 1024 places, 1159 transitions, 3539 flow [2022-07-13 22:00:02,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1024 places, 1159 transitions, 3539 flow [2022-07-13 22:00:02,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:00:02,851 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 22:00:02,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 22:00:02,854 INFO L129 PetriNetUnfolder]: 3/73 cut-off events. [2022-07-13 22:00:02,854 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 22:00:02,854 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:02,854 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] [2022-07-13 22:00:02,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:02,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2064318686, now seen corresponding path program 1 times [2022-07-13 22:00:02,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:02,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147866590] [2022-07-13 22:00:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:02,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:02,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:02,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147866590] [2022-07-13 22:00:02,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147866590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:00:02,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:00:02,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:00:02,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842823290] [2022-07-13 22:00:02,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:00:02,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:00:02,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:00:02,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:00:02,927 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 916 out of 1159 [2022-07-13 22:00:02,928 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) [2022-07-13 22:00:02,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:02,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 916 of 1159 [2022-07-13 22:00:02,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:04,150 INFO L129 PetriNetUnfolder]: 0/1952 cut-off events. [2022-07-13 22:00:04,151 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-13 22:00:04,151 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. [2022-07-13 22:00:04,154 INFO L132 encePairwiseOnDemand]: 954/1159 looper letters, 42 selfloop transitions, 2 changer transitions 11/960 dead transitions. [2022-07-13 22:00:04,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1025 places, 960 transitions, 3229 flow [2022-07-13 22:00:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:00:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:00:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3002 transitions. [2022-07-13 22:00:04,156 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8633879781420765 [2022-07-13 22:00:04,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3002 transitions. [2022-07-13 22:00:04,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3002 transitions. [2022-07-13 22:00:04,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:04,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3002 transitions. [2022-07-13 22:00:04,159 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) [2022-07-13 22:00:04,160 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) [2022-07-13 22:00:04,160 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) [2022-07-13 22:00:04,160 INFO L186 Difference]: Start difference. First operand has 1024 places, 1159 transitions, 3539 flow. Second operand 3 states and 3002 transitions. [2022-07-13 22:00:04,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1025 places, 960 transitions, 3229 flow [2022-07-13 22:00:04,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1025 places, 960 transitions, 2173 flow, removed 528 selfloop flow, removed 0 redundant places. [2022-07-13 22:00:04,174 INFO L242 Difference]: Finished difference. Result has 1026 places, 946 transitions, 2067 flow [2022-07-13 22:00:04,174 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} [2022-07-13 22:00:04,174 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 2 predicate places. [2022-07-13 22:00:04,174 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 946 transitions, 2067 flow [2022-07-13 22:00:04,175 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) [2022-07-13 22:00:04,175 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:04,175 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] [2022-07-13 22:00:04,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-07-13 22:00:04,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:04,192 INFO L85 PathProgramCache]: Analyzing trace with hash 410736534, now seen corresponding path program 1 times [2022-07-13 22:00:04,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:04,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409602119] [2022-07-13 22:00:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:04,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:04,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:04,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409602119] [2022-07-13 22:00:04,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409602119] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:04,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88754042] [2022-07-13 22:00:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:04,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:04,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:04,225 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) [2022-07-13 22:00:04,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-07-13 22:00:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:05,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:00:05,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:05,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:05,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88754042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:05,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:05,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 22:00:05,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155045279] [2022-07-13 22:00:05,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:05,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:00:05,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:00:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:00:05,117 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-13 22:00:05,120 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) [2022-07-13 22:00:05,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:05,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-13 22:00:05,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:05,989 INFO L129 PetriNetUnfolder]: 0/1567 cut-off events. [2022-07-13 22:00:05,989 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-07-13 22:00:05,989 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. [2022-07-13 22:00:05,992 INFO L132 encePairwiseOnDemand]: 1153/1159 looper letters, 43 selfloop transitions, 9 changer transitions 0/956 dead transitions. [2022-07-13 22:00:05,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1023 places, 956 transitions, 2193 flow [2022-07-13 22:00:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:00:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:00:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8289 transitions. [2022-07-13 22:00:05,996 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946505608283002 [2022-07-13 22:00:05,996 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8289 transitions. [2022-07-13 22:00:05,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8289 transitions. [2022-07-13 22:00:05,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:05,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8289 transitions. [2022-07-13 22:00:06,002 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) [2022-07-13 22:00:06,006 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) [2022-07-13 22:00:06,007 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) [2022-07-13 22:00:06,007 INFO L186 Difference]: Start difference. First operand has 1026 places, 946 transitions, 2067 flow. Second operand 9 states and 8289 transitions. [2022-07-13 22:00:06,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1023 places, 956 transitions, 2193 flow [2022-07-13 22:00:06,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1022 places, 956 transitions, 2191 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:00:06,017 INFO L242 Difference]: Finished difference. Result has 1025 places, 952 transitions, 2115 flow [2022-07-13 22:00:06,017 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} [2022-07-13 22:00:06,017 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 1 predicate places. [2022-07-13 22:00:06,018 INFO L495 AbstractCegarLoop]: Abstraction has has 1025 places, 952 transitions, 2115 flow [2022-07-13 22:00:06,018 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) [2022-07-13 22:00:06,018 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:06,019 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] [2022-07-13 22:00:06,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:06,231 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 [2022-07-13 22:00:06,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1249055297, now seen corresponding path program 1 times [2022-07-13 22:00:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:06,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006825417] [2022-07-13 22:00:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:06,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006825417] [2022-07-13 22:00:06,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006825417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945927768] [2022-07-13 22:00:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:06,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:06,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:06,279 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) [2022-07-13 22:00:06,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-07-13 22:00:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:07,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:00:07,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:07,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:07,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945927768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:07,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:07,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 22:00:07,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218551468] [2022-07-13 22:00:07,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:07,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:00:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:07,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:00:07,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:00:07,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-13 22:00:07,286 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) [2022-07-13 22:00:07,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:07,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-13 22:00:07,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:08,262 INFO L129 PetriNetUnfolder]: 0/1523 cut-off events. [2022-07-13 22:00:08,262 INFO L130 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-07-13 22:00:08,262 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. [2022-07-13 22:00:08,265 INFO L132 encePairwiseOnDemand]: 1153/1159 looper letters, 51 selfloop transitions, 21 changer transitions 0/976 dead transitions. [2022-07-13 22:00:08,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1045 places, 976 transitions, 2367 flow [2022-07-13 22:00:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 22:00:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 22:00:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19291 transitions. [2022-07-13 22:00:08,273 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.792596244710136 [2022-07-13 22:00:08,273 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19291 transitions. [2022-07-13 22:00:08,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19291 transitions. [2022-07-13 22:00:08,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:08,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19291 transitions. [2022-07-13 22:00:08,285 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) [2022-07-13 22:00:08,294 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) [2022-07-13 22:00:08,295 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) [2022-07-13 22:00:08,295 INFO L186 Difference]: Start difference. First operand has 1025 places, 952 transitions, 2115 flow. Second operand 21 states and 19291 transitions. [2022-07-13 22:00:08,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1045 places, 976 transitions, 2367 flow [2022-07-13 22:00:08,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1044 places, 976 transitions, 2353 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 22:00:08,306 INFO L242 Difference]: Finished difference. Result has 1049 places, 965 transitions, 2239 flow [2022-07-13 22:00:08,306 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} [2022-07-13 22:00:08,307 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 25 predicate places. [2022-07-13 22:00:08,307 INFO L495 AbstractCegarLoop]: Abstraction has has 1049 places, 965 transitions, 2239 flow [2022-07-13 22:00:08,308 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) [2022-07-13 22:00:08,308 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:08,308 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] [2022-07-13 22:00:08,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:08,528 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 [2022-07-13 22:00:08,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:08,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1630016605, now seen corresponding path program 1 times [2022-07-13 22:00:08,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:08,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370191272] [2022-07-13 22:00:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:08,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:08,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:08,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370191272] [2022-07-13 22:00:08,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370191272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:08,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260003808] [2022-07-13 22:00:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:08,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:08,620 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) [2022-07-13 22:00:08,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-07-13 22:00:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:09,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 22:00:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:09,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:09,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260003808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:09,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:09,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 22:00:09,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005965868] [2022-07-13 22:00:09,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:09,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 22:00:09,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:09,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 22:00:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 22:00:09,789 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-13 22:00:09,797 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) [2022-07-13 22:00:09,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:09,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-13 22:00:09,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:11,038 INFO L129 PetriNetUnfolder]: 0/1435 cut-off events. [2022-07-13 22:00:11,038 INFO L130 PetriNetUnfolder]: For 762/762 co-relation queries the response was YES. [2022-07-13 22:00:11,039 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. [2022-07-13 22:00:11,042 INFO L132 encePairwiseOnDemand]: 1153/1159 looper letters, 67 selfloop transitions, 45 changer transitions 0/1016 dead transitions. [2022-07-13 22:00:11,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1093 places, 1016 transitions, 2779 flow [2022-07-13 22:00:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 22:00:11,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 22:00:11,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 41295 transitions. [2022-07-13 22:00:11,058 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7917745182628703 [2022-07-13 22:00:11,058 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 41295 transitions. [2022-07-13 22:00:11,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 41295 transitions. [2022-07-13 22:00:11,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:11,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 41295 transitions. [2022-07-13 22:00:11,088 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) [2022-07-13 22:00:11,224 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) [2022-07-13 22:00:11,231 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) [2022-07-13 22:00:11,231 INFO L186 Difference]: Start difference. First operand has 1049 places, 965 transitions, 2239 flow. Second operand 45 states and 41295 transitions. [2022-07-13 22:00:11,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1093 places, 1016 transitions, 2779 flow [2022-07-13 22:00:11,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1087 places, 1016 transitions, 2739 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 22:00:11,243 INFO L242 Difference]: Finished difference. Result has 1096 places, 990 transitions, 2517 flow [2022-07-13 22:00:11,243 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} [2022-07-13 22:00:11,244 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 72 predicate places. [2022-07-13 22:00:11,244 INFO L495 AbstractCegarLoop]: Abstraction has has 1096 places, 990 transitions, 2517 flow [2022-07-13 22:00:11,247 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) [2022-07-13 22:00:11,247 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:11,247 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] [2022-07-13 22:00:11,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:11,460 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 [2022-07-13 22:00:11,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:11,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1766954647, now seen corresponding path program 1 times [2022-07-13 22:00:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:11,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916870498] [2022-07-13 22:00:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:11,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:11,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916870498] [2022-07-13 22:00:11,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916870498] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581567587] [2022-07-13 22:00:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:11,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:11,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:11,743 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) [2022-07-13 22:00:11,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-07-13 22:00:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 22:00:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:12,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:13,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581567587] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:13,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:13,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 22:00:13,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422389216] [2022-07-13 22:00:13,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:13,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 22:00:13,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 22:00:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 22:00:13,481 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-13 22:00:13,499 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) [2022-07-13 22:00:13,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:13,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-13 22:00:13,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:15,342 INFO L129 PetriNetUnfolder]: 0/1259 cut-off events. [2022-07-13 22:00:15,342 INFO L130 PetriNetUnfolder]: For 2466/2466 co-relation queries the response was YES. [2022-07-13 22:00:15,342 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. [2022-07-13 22:00:15,344 INFO L132 encePairwiseOnDemand]: 1153/1159 looper letters, 99 selfloop transitions, 93 changer transitions 0/1096 dead transitions. [2022-07-13 22:00:15,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1188 places, 1096 transitions, 3749 flow [2022-07-13 22:00:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-13 22:00:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-13 22:00:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 85303 transitions. [2022-07-13 22:00:15,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7914034159963632 [2022-07-13 22:00:15,379 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 85303 transitions. [2022-07-13 22:00:15,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 85303 transitions. [2022-07-13 22:00:15,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:15,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 85303 transitions. [2022-07-13 22:00:15,442 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) [2022-07-13 22:00:15,499 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) [2022-07-13 22:00:15,516 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) [2022-07-13 22:00:15,517 INFO L186 Difference]: Start difference. First operand has 1096 places, 990 transitions, 2517 flow. Second operand 93 states and 85303 transitions. [2022-07-13 22:00:15,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1188 places, 1096 transitions, 3749 flow [2022-07-13 22:00:15,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1170 places, 1096 transitions, 3661 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-13 22:00:15,533 INFO L242 Difference]: Finished difference. Result has 1187 places, 1039 transitions, 3151 flow [2022-07-13 22:00:15,533 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} [2022-07-13 22:00:15,534 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 163 predicate places. [2022-07-13 22:00:15,534 INFO L495 AbstractCegarLoop]: Abstraction has has 1187 places, 1039 transitions, 3151 flow [2022-07-13 22:00:15,539 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) [2022-07-13 22:00:15,539 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:15,539 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] [2022-07-13 22:00:15,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:15,744 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 [2022-07-13 22:00:15,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:15,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2128612671, now seen corresponding path program 1 times [2022-07-13 22:00:15,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:15,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999616093] [2022-07-13 22:00:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:15,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:16,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:16,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999616093] [2022-07-13 22:00:16,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999616093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:16,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648484579] [2022-07-13 22:00:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:16,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:16,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:16,413 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) [2022-07-13 22:00:16,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-07-13 22:00:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:17,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-13 22:00:17,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:17,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:19,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648484579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:19,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:19,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-13 22:00:19,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003470769] [2022-07-13 22:00:19,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:19,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-13 22:00:19,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:19,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-13 22:00:19,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-13 22:00:19,320 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-07-13 22:00:19,355 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) [2022-07-13 22:00:19,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:19,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-07-13 22:00:19,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:21,960 INFO L129 PetriNetUnfolder]: 0/1226 cut-off events. [2022-07-13 22:00:21,960 INFO L130 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2022-07-13 22:00:21,961 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. [2022-07-13 22:00:21,963 INFO L132 encePairwiseOnDemand]: 1154/1159 looper letters, 102 selfloop transitions, 100 changer transitions 0/1096 dead transitions. [2022-07-13 22:00:21,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1277 places, 1096 transitions, 3997 flow [2022-07-13 22:00:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-07-13 22:00:21,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2022-07-13 22:00:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 93535 transitions. [2022-07-13 22:00:21,998 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912077686985062 [2022-07-13 22:00:21,998 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 93535 transitions. [2022-07-13 22:00:21,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 93535 transitions. [2022-07-13 22:00:22,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:22,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 93535 transitions. [2022-07-13 22:00:22,062 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) [2022-07-13 22:00:22,123 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) [2022-07-13 22:00:22,142 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) [2022-07-13 22:00:22,142 INFO L186 Difference]: Start difference. First operand has 1187 places, 1039 transitions, 3151 flow. Second operand 102 states and 93535 transitions. [2022-07-13 22:00:22,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1277 places, 1096 transitions, 3997 flow [2022-07-13 22:00:22,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1204 places, 1096 transitions, 3655 flow, removed 20 selfloop flow, removed 73 redundant places. [2022-07-13 22:00:22,160 INFO L242 Difference]: Finished difference. Result has 1204 places, 1034 transitions, 3063 flow [2022-07-13 22:00:22,160 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} [2022-07-13 22:00:22,161 INFO L279 CegarLoopForPetriNet]: 1024 programPoint places, 180 predicate places. [2022-07-13 22:00:22,161 INFO L495 AbstractCegarLoop]: Abstraction has has 1204 places, 1034 transitions, 3063 flow [2022-07-13 22:00:22,172 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) [2022-07-13 22:00:22,172 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:22,172 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] [2022-07-13 22:00:22,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-07-13 22:00:22,393 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 [2022-07-13 22:00:22,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:22,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1805696958, now seen corresponding path program 1 times [2022-07-13 22:00:22,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:22,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381128856] [2022-07-13 22:00:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:22,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:00:22,435 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 22:00:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:00:22,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 22:00:22,503 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 22:00:22,503 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 22:00:22,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 22:00:22,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2022-07-13 22:00:22,504 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:22,504 WARN L231 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 22:00:22,504 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2022-07-13 22:00:22,562 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 22:00:22,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1053 places, 1192 transitions, 3676 flow [2022-07-13 22:00:23,624 INFO L129 PetriNetUnfolder]: 344/2411 cut-off events. [2022-07-13 22:00:23,624 INFO L130 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2022-07-13 22:00:23,786 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. [2022-07-13 22:00:23,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 1053 places, 1192 transitions, 3676 flow [2022-07-13 22:00:23,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1053 places, 1192 transitions, 3676 flow [2022-07-13 22:00:23,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:00:23,856 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 22:00:23,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 22:00:23,859 INFO L129 PetriNetUnfolder]: 2/73 cut-off events. [2022-07-13 22:00:23,859 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 22:00:23,859 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:23,859 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] [2022-07-13 22:00:23,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash 510725410, now seen corresponding path program 1 times [2022-07-13 22:00:23,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:23,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435032074] [2022-07-13 22:00:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:23,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:23,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:23,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435032074] [2022-07-13 22:00:23,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435032074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:00:23,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:00:23,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:00:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889266050] [2022-07-13 22:00:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:00:23,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:00:23,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:00:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:00:23,883 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 942 out of 1192 [2022-07-13 22:00:23,884 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) [2022-07-13 22:00:23,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:23,885 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 942 of 1192 [2022-07-13 22:00:23,885 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:25,050 INFO L129 PetriNetUnfolder]: 0/2010 cut-off events. [2022-07-13 22:00:25,050 INFO L130 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2022-07-13 22:00:25,051 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. [2022-07-13 22:00:25,054 INFO L132 encePairwiseOnDemand]: 981/1192 looper letters, 43 selfloop transitions, 2 changer transitions 11/987 dead transitions. [2022-07-13 22:00:25,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1054 places, 987 transitions, 3356 flow [2022-07-13 22:00:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:00:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:00:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3087 transitions. [2022-07-13 22:00:25,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.863255033557047 [2022-07-13 22:00:25,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3087 transitions. [2022-07-13 22:00:25,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3087 transitions. [2022-07-13 22:00:25,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:25,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3087 transitions. [2022-07-13 22:00:25,059 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) [2022-07-13 22:00:25,060 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) [2022-07-13 22:00:25,060 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) [2022-07-13 22:00:25,061 INFO L186 Difference]: Start difference. First operand has 1053 places, 1192 transitions, 3676 flow. Second operand 3 states and 3087 transitions. [2022-07-13 22:00:25,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1054 places, 987 transitions, 3356 flow [2022-07-13 22:00:25,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1054 places, 987 transitions, 2234 flow, removed 561 selfloop flow, removed 0 redundant places. [2022-07-13 22:00:25,079 INFO L242 Difference]: Finished difference. Result has 1055 places, 973 transitions, 2126 flow [2022-07-13 22:00:25,079 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} [2022-07-13 22:00:25,079 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 2 predicate places. [2022-07-13 22:00:25,079 INFO L495 AbstractCegarLoop]: Abstraction has has 1055 places, 973 transitions, 2126 flow [2022-07-13 22:00:25,080 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) [2022-07-13 22:00:25,080 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:25,080 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] [2022-07-13 22:00:25,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2022-07-13 22:00:25,080 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:25,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1460662602, now seen corresponding path program 1 times [2022-07-13 22:00:25,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:25,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493616746] [2022-07-13 22:00:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:25,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:25,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:25,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493616746] [2022-07-13 22:00:25,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493616746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:25,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514713082] [2022-07-13 22:00:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:25,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:25,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:25,113 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) [2022-07-13 22:00:25,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-07-13 22:00:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:00:26,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:26,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:26,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514713082] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:26,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:26,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 22:00:26,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928901757] [2022-07-13 22:00:26,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:00:26,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:26,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:00:26,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:00:26,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-07-13 22:00:26,095 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) [2022-07-13 22:00:26,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:26,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-07-13 22:00:26,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:27,021 INFO L129 PetriNetUnfolder]: 0/1614 cut-off events. [2022-07-13 22:00:27,021 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-13 22:00:27,022 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. [2022-07-13 22:00:27,034 INFO L132 encePairwiseOnDemand]: 1186/1192 looper letters, 44 selfloop transitions, 9 changer transitions 0/983 dead transitions. [2022-07-13 22:00:27,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1052 places, 983 transitions, 2254 flow [2022-07-13 22:00:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:00:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:00:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8524 transitions. [2022-07-13 22:00:27,038 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945563012677107 [2022-07-13 22:00:27,038 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8524 transitions. [2022-07-13 22:00:27,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8524 transitions. [2022-07-13 22:00:27,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:27,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8524 transitions. [2022-07-13 22:00:27,043 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) [2022-07-13 22:00:27,047 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) [2022-07-13 22:00:27,048 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) [2022-07-13 22:00:27,048 INFO L186 Difference]: Start difference. First operand has 1055 places, 973 transitions, 2126 flow. Second operand 9 states and 8524 transitions. [2022-07-13 22:00:27,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1052 places, 983 transitions, 2254 flow [2022-07-13 22:00:27,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1051 places, 983 transitions, 2252 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:00:27,057 INFO L242 Difference]: Finished difference. Result has 1054 places, 979 transitions, 2174 flow [2022-07-13 22:00:27,058 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} [2022-07-13 22:00:27,058 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 1 predicate places. [2022-07-13 22:00:27,058 INFO L495 AbstractCegarLoop]: Abstraction has has 1054 places, 979 transitions, 2174 flow [2022-07-13 22:00:27,059 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) [2022-07-13 22:00:27,059 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:27,059 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] [2022-07-13 22:00:27,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:27,274 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 [2022-07-13 22:00:27,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:27,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:27,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1788896161, now seen corresponding path program 1 times [2022-07-13 22:00:27,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:27,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071140517] [2022-07-13 22:00:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:27,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:27,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071140517] [2022-07-13 22:00:27,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071140517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591963728] [2022-07-13 22:00:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:27,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:27,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:27,319 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) [2022-07-13 22:00:27,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-07-13 22:00:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:28,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:00:28,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:28,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:28,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591963728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:28,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:28,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 22:00:28,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503218589] [2022-07-13 22:00:28,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:28,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:00:28,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:00:28,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:00:28,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-07-13 22:00:28,319 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) [2022-07-13 22:00:28,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:28,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-07-13 22:00:28,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:29,343 INFO L129 PetriNetUnfolder]: 0/1570 cut-off events. [2022-07-13 22:00:29,343 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-07-13 22:00:29,344 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. [2022-07-13 22:00:29,347 INFO L132 encePairwiseOnDemand]: 1186/1192 looper letters, 52 selfloop transitions, 21 changer transitions 0/1003 dead transitions. [2022-07-13 22:00:29,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1074 places, 1003 transitions, 2428 flow [2022-07-13 22:00:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 22:00:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 22:00:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19838 transitions. [2022-07-13 22:00:29,354 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925055928411633 [2022-07-13 22:00:29,354 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19838 transitions. [2022-07-13 22:00:29,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19838 transitions. [2022-07-13 22:00:29,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:29,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19838 transitions. [2022-07-13 22:00:29,367 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) [2022-07-13 22:00:29,377 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) [2022-07-13 22:00:29,378 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) [2022-07-13 22:00:29,378 INFO L186 Difference]: Start difference. First operand has 1054 places, 979 transitions, 2174 flow. Second operand 21 states and 19838 transitions. [2022-07-13 22:00:29,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1074 places, 1003 transitions, 2428 flow [2022-07-13 22:00:29,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1073 places, 1003 transitions, 2414 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 22:00:29,389 INFO L242 Difference]: Finished difference. Result has 1078 places, 992 transitions, 2298 flow [2022-07-13 22:00:29,390 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} [2022-07-13 22:00:29,390 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 25 predicate places. [2022-07-13 22:00:29,390 INFO L495 AbstractCegarLoop]: Abstraction has has 1078 places, 992 transitions, 2298 flow [2022-07-13 22:00:29,391 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) [2022-07-13 22:00:29,391 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:29,391 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] [2022-07-13 22:00:29,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:29,611 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 [2022-07-13 22:00:29,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:29,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:29,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1716228483, now seen corresponding path program 1 times [2022-07-13 22:00:29,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:29,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360962832] [2022-07-13 22:00:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:29,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:29,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:29,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360962832] [2022-07-13 22:00:29,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360962832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:29,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334046893] [2022-07-13 22:00:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:29,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:29,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:29,720 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) [2022-07-13 22:00:29,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-07-13 22:00:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 22:00:30,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:30,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:30,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334046893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:30,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:30,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 22:00:30,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153227784] [2022-07-13 22:00:30,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:30,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 22:00:30,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 22:00:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 22:00:30,910 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-07-13 22:00:30,929 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) [2022-07-13 22:00:30,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:30,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-07-13 22:00:30,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:32,051 INFO L129 PetriNetUnfolder]: 0/1482 cut-off events. [2022-07-13 22:00:32,052 INFO L130 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-07-13 22:00:32,052 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. [2022-07-13 22:00:32,055 INFO L132 encePairwiseOnDemand]: 1186/1192 looper letters, 68 selfloop transitions, 45 changer transitions 0/1043 dead transitions. [2022-07-13 22:00:32,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1122 places, 1043 transitions, 2840 flow [2022-07-13 22:00:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 22:00:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 22:00:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 42466 transitions. [2022-07-13 22:00:32,070 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916853094705444 [2022-07-13 22:00:32,070 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 42466 transitions. [2022-07-13 22:00:32,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 42466 transitions. [2022-07-13 22:00:32,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:32,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 42466 transitions. [2022-07-13 22:00:32,099 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) [2022-07-13 22:00:32,125 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) [2022-07-13 22:00:32,132 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) [2022-07-13 22:00:32,133 INFO L186 Difference]: Start difference. First operand has 1078 places, 992 transitions, 2298 flow. Second operand 45 states and 42466 transitions. [2022-07-13 22:00:32,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1122 places, 1043 transitions, 2840 flow [2022-07-13 22:00:32,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1116 places, 1043 transitions, 2800 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 22:00:32,145 INFO L242 Difference]: Finished difference. Result has 1125 places, 1017 transitions, 2576 flow [2022-07-13 22:00:32,146 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} [2022-07-13 22:00:32,146 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 72 predicate places. [2022-07-13 22:00:32,146 INFO L495 AbstractCegarLoop]: Abstraction has has 1125 places, 1017 transitions, 2576 flow [2022-07-13 22:00:32,149 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) [2022-07-13 22:00:32,149 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:32,149 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] [2022-07-13 22:00:32,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:32,369 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 [2022-07-13 22:00:32,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1335466633, now seen corresponding path program 1 times [2022-07-13 22:00:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:32,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219859882] [2022-07-13 22:00:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:32,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:32,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219859882] [2022-07-13 22:00:32,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219859882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:32,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988274893] [2022-07-13 22:00:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:32,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:32,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:32,555 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) [2022-07-13 22:00:32,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-07-13 22:00:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:33,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 22:00:33,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:33,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:34,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988274893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:34,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:34,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 22:00:34,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253151880] [2022-07-13 22:00:34,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:34,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 22:00:34,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 22:00:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 22:00:34,321 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-07-13 22:00:34,337 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) [2022-07-13 22:00:34,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:34,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-07-13 22:00:34,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:36,524 INFO L129 PetriNetUnfolder]: 0/1306 cut-off events. [2022-07-13 22:00:36,524 INFO L130 PetriNetUnfolder]: For 2587/2587 co-relation queries the response was YES. [2022-07-13 22:00:36,524 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. [2022-07-13 22:00:36,526 INFO L132 encePairwiseOnDemand]: 1186/1192 looper letters, 100 selfloop transitions, 93 changer transitions 0/1123 dead transitions. [2022-07-13 22:00:36,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1217 places, 1123 transitions, 3810 flow [2022-07-13 22:00:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-13 22:00:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-13 22:00:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 87722 transitions. [2022-07-13 22:00:36,558 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7913148589160713 [2022-07-13 22:00:36,558 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 87722 transitions. [2022-07-13 22:00:36,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 87722 transitions. [2022-07-13 22:00:36,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:36,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 87722 transitions. [2022-07-13 22:00:36,621 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) [2022-07-13 22:00:36,678 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) [2022-07-13 22:00:36,696 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) [2022-07-13 22:00:36,697 INFO L186 Difference]: Start difference. First operand has 1125 places, 1017 transitions, 2576 flow. Second operand 93 states and 87722 transitions. [2022-07-13 22:00:36,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1217 places, 1123 transitions, 3810 flow [2022-07-13 22:00:36,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1199 places, 1123 transitions, 3722 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-13 22:00:36,712 INFO L242 Difference]: Finished difference. Result has 1216 places, 1066 transitions, 3210 flow [2022-07-13 22:00:36,713 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} [2022-07-13 22:00:36,713 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 163 predicate places. [2022-07-13 22:00:36,713 INFO L495 AbstractCegarLoop]: Abstraction has has 1216 places, 1066 transitions, 3210 flow [2022-07-13 22:00:36,719 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) [2022-07-13 22:00:36,719 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:36,719 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] [2022-07-13 22:00:36,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-07-13 22:00:36,921 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 [2022-07-13 22:00:36,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:36,922 INFO L85 PathProgramCache]: Analyzing trace with hash -678875617, now seen corresponding path program 1 times [2022-07-13 22:00:36,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:36,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690933936] [2022-07-13 22:00:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:36,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:37,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:37,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690933936] [2022-07-13 22:00:37,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690933936] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901582271] [2022-07-13 22:00:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:37,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:37,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:37,928 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) [2022-07-13 22:00:37,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-07-13 22:00:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-13 22:00:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:39,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:40,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901582271] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:40,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:40,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-13 22:00:40,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487559028] [2022-07-13 22:00:40,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:40,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-13 22:00:40,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-13 22:00:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-13 22:00:40,904 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-07-13 22:00:40,938 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) [2022-07-13 22:00:40,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:40,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-07-13 22:00:40,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:43,634 INFO L129 PetriNetUnfolder]: 0/1262 cut-off events. [2022-07-13 22:00:43,634 INFO L130 PetriNetUnfolder]: For 2686/2686 co-relation queries the response was YES. [2022-07-13 22:00:43,634 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. [2022-07-13 22:00:43,636 INFO L132 encePairwiseOnDemand]: 1187/1192 looper letters, 105 selfloop transitions, 103 changer transitions 0/1128 dead transitions. [2022-07-13 22:00:43,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1309 places, 1128 transitions, 4122 flow [2022-07-13 22:00:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-13 22:00:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-07-13 22:00:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 99017 transitions. [2022-07-13 22:00:43,671 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7911233620965165 [2022-07-13 22:00:43,672 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 99017 transitions. [2022-07-13 22:00:43,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 99017 transitions. [2022-07-13 22:00:43,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:43,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 99017 transitions. [2022-07-13 22:00:43,742 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) [2022-07-13 22:00:43,809 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) [2022-07-13 22:00:43,830 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) [2022-07-13 22:00:43,830 INFO L186 Difference]: Start difference. First operand has 1216 places, 1066 transitions, 3210 flow. Second operand 105 states and 99017 transitions. [2022-07-13 22:00:43,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1309 places, 1128 transitions, 4122 flow [2022-07-13 22:00:43,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1236 places, 1128 transitions, 3770 flow, removed 21 selfloop flow, removed 73 redundant places. [2022-07-13 22:00:43,848 INFO L242 Difference]: Finished difference. Result has 1236 places, 1064 transitions, 3156 flow [2022-07-13 22:00:43,849 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} [2022-07-13 22:00:43,849 INFO L279 CegarLoopForPetriNet]: 1053 programPoint places, 183 predicate places. [2022-07-13 22:00:43,849 INFO L495 AbstractCegarLoop]: Abstraction has has 1236 places, 1064 transitions, 3156 flow [2022-07-13 22:00:43,861 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) [2022-07-13 22:00:43,862 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:43,862 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] [2022-07-13 22:00:43,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:44,083 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 [2022-07-13 22:00:44,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:44,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1145413005, now seen corresponding path program 1 times [2022-07-13 22:00:44,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:44,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394772818] [2022-07-13 22:00:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:44,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:00:44,128 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 22:00:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:00:44,201 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 22:00:44,201 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 22:00:44,202 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 22:00:44,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 22:00:44,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-07-13 22:00:44,202 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:00:44,202 WARN L231 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 22:00:44,202 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2022-07-13 22:00:44,247 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 22:00:44,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1082 places, 1225 transitions, 3815 flow [2022-07-13 22:00:45,431 INFO L129 PetriNetUnfolder]: 354/2480 cut-off events. [2022-07-13 22:00:45,432 INFO L130 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2022-07-13 22:00:45,659 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. [2022-07-13 22:00:45,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 1082 places, 1225 transitions, 3815 flow [2022-07-13 22:00:45,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1082 places, 1225 transitions, 3815 flow [2022-07-13 22:00:45,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:00:45,758 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 22:00:45,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 22:00:45,761 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2022-07-13 22:00:45,762 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 22:00:45,762 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:45,762 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] [2022-07-13 22:00:45,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1214954978, now seen corresponding path program 1 times [2022-07-13 22:00:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:45,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667127779] [2022-07-13 22:00:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:45,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:45,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667127779] [2022-07-13 22:00:45,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667127779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:00:45,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:00:45,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:00:45,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211257130] [2022-07-13 22:00:45,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:00:45,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:00:45,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:45,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:00:45,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:00:45,786 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 968 out of 1225 [2022-07-13 22:00:45,787 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) [2022-07-13 22:00:45,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:45,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 968 of 1225 [2022-07-13 22:00:45,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:47,020 INFO L129 PetriNetUnfolder]: 0/2068 cut-off events. [2022-07-13 22:00:47,020 INFO L130 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2022-07-13 22:00:47,021 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. [2022-07-13 22:00:47,024 INFO L132 encePairwiseOnDemand]: 1008/1225 looper letters, 44 selfloop transitions, 2 changer transitions 11/1014 dead transitions. [2022-07-13 22:00:47,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1083 places, 1014 transitions, 3485 flow [2022-07-13 22:00:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:00:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:00:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3172 transitions. [2022-07-13 22:00:47,026 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8631292517006802 [2022-07-13 22:00:47,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3172 transitions. [2022-07-13 22:00:47,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3172 transitions. [2022-07-13 22:00:47,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:47,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3172 transitions. [2022-07-13 22:00:47,028 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) [2022-07-13 22:00:47,030 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) [2022-07-13 22:00:47,030 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) [2022-07-13 22:00:47,030 INFO L186 Difference]: Start difference. First operand has 1082 places, 1225 transitions, 3815 flow. Second operand 3 states and 3172 transitions. [2022-07-13 22:00:47,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1083 places, 1014 transitions, 3485 flow [2022-07-13 22:00:47,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1083 places, 1014 transitions, 2295 flow, removed 595 selfloop flow, removed 0 redundant places. [2022-07-13 22:00:47,047 INFO L242 Difference]: Finished difference. Result has 1084 places, 1000 transitions, 2185 flow [2022-07-13 22:00:47,047 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} [2022-07-13 22:00:47,047 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 2 predicate places. [2022-07-13 22:00:47,047 INFO L495 AbstractCegarLoop]: Abstraction has has 1084 places, 1000 transitions, 2185 flow [2022-07-13 22:00:47,048 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) [2022-07-13 22:00:47,048 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:47,048 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] [2022-07-13 22:00:47,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-07-13 22:00:47,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2139833034, now seen corresponding path program 1 times [2022-07-13 22:00:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:47,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612364100] [2022-07-13 22:00:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:47,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:47,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:47,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612364100] [2022-07-13 22:00:47,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612364100] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:47,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71489428] [2022-07-13 22:00:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:47,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:47,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:47,080 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) [2022-07-13 22:00:47,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-07-13 22:00:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:48,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:00:48,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:48,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:48,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71489428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:48,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:48,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 22:00:48,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750478271] [2022-07-13 22:00:48,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:48,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:00:48,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:48,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:00:48,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:00:48,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-07-13 22:00:48,082 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) [2022-07-13 22:00:48,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:48,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-07-13 22:00:48,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:49,079 INFO L129 PetriNetUnfolder]: 0/1661 cut-off events. [2022-07-13 22:00:49,079 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-07-13 22:00:49,080 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. [2022-07-13 22:00:49,082 INFO L132 encePairwiseOnDemand]: 1219/1225 looper letters, 45 selfloop transitions, 9 changer transitions 0/1010 dead transitions. [2022-07-13 22:00:49,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1081 places, 1010 transitions, 2315 flow [2022-07-13 22:00:49,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:00:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:00:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8759 transitions. [2022-07-13 22:00:49,086 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7944671201814059 [2022-07-13 22:00:49,087 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8759 transitions. [2022-07-13 22:00:49,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8759 transitions. [2022-07-13 22:00:49,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:49,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8759 transitions. [2022-07-13 22:00:49,094 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) [2022-07-13 22:00:49,098 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) [2022-07-13 22:00:49,099 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) [2022-07-13 22:00:49,099 INFO L186 Difference]: Start difference. First operand has 1084 places, 1000 transitions, 2185 flow. Second operand 9 states and 8759 transitions. [2022-07-13 22:00:49,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1081 places, 1010 transitions, 2315 flow [2022-07-13 22:00:49,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1080 places, 1010 transitions, 2313 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:00:49,109 INFO L242 Difference]: Finished difference. Result has 1083 places, 1006 transitions, 2233 flow [2022-07-13 22:00:49,109 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} [2022-07-13 22:00:49,109 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 1 predicate places. [2022-07-13 22:00:49,110 INFO L495 AbstractCegarLoop]: Abstraction has has 1083 places, 1006 transitions, 2233 flow [2022-07-13 22:00:49,110 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) [2022-07-13 22:00:49,110 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:49,110 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] [2022-07-13 22:00:49,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:49,331 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 [2022-07-13 22:00:49,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash -582976095, now seen corresponding path program 1 times [2022-07-13 22:00:49,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:49,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141321697] [2022-07-13 22:00:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:49,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:49,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:49,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141321697] [2022-07-13 22:00:49,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141321697] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:49,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874156243] [2022-07-13 22:00:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:49,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:49,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:49,404 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) [2022-07-13 22:00:49,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-07-13 22:00:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:50,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:00:50,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:50,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:50,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874156243] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:50,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:50,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 22:00:50,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668350404] [2022-07-13 22:00:50,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:50,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:00:50,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:50,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:00:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:00:50,561 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-07-13 22:00:50,566 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) [2022-07-13 22:00:50,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:50,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-07-13 22:00:50,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:51,654 INFO L129 PetriNetUnfolder]: 0/1617 cut-off events. [2022-07-13 22:00:51,654 INFO L130 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-07-13 22:00:51,654 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. [2022-07-13 22:00:51,657 INFO L132 encePairwiseOnDemand]: 1219/1225 looper letters, 53 selfloop transitions, 21 changer transitions 0/1030 dead transitions. [2022-07-13 22:00:51,657 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1103 places, 1030 transitions, 2489 flow [2022-07-13 22:00:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 22:00:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 22:00:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20385 transitions. [2022-07-13 22:00:51,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924198250728863 [2022-07-13 22:00:51,665 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20385 transitions. [2022-07-13 22:00:51,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20385 transitions. [2022-07-13 22:00:51,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:51,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20385 transitions. [2022-07-13 22:00:51,679 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) [2022-07-13 22:00:51,691 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) [2022-07-13 22:00:51,693 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) [2022-07-13 22:00:51,694 INFO L186 Difference]: Start difference. First operand has 1083 places, 1006 transitions, 2233 flow. Second operand 21 states and 20385 transitions. [2022-07-13 22:00:51,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1103 places, 1030 transitions, 2489 flow [2022-07-13 22:00:51,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1102 places, 1030 transitions, 2475 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 22:00:51,705 INFO L242 Difference]: Finished difference. Result has 1107 places, 1019 transitions, 2357 flow [2022-07-13 22:00:51,706 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} [2022-07-13 22:00:51,706 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 25 predicate places. [2022-07-13 22:00:51,706 INFO L495 AbstractCegarLoop]: Abstraction has has 1107 places, 1019 transitions, 2357 flow [2022-07-13 22:00:51,707 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) [2022-07-13 22:00:51,708 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:51,708 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] [2022-07-13 22:00:51,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-07-13 22:00:51,923 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 [2022-07-13 22:00:51,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:51,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2043167363, now seen corresponding path program 1 times [2022-07-13 22:00:51,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:51,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672818045] [2022-07-13 22:00:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:51,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:52,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:52,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672818045] [2022-07-13 22:00:52,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672818045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:52,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750695582] [2022-07-13 22:00:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:52,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:52,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:52,004 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) [2022-07-13 22:00:52,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-07-13 22:00:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:53,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 22:00:53,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:53,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:53,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750695582] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:53,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:53,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 22:00:53,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504441407] [2022-07-13 22:00:53,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:53,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 22:00:53,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 22:00:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 22:00:53,265 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-07-13 22:00:53,274 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) [2022-07-13 22:00:53,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:53,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-07-13 22:00:53,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:54,551 INFO L129 PetriNetUnfolder]: 0/1529 cut-off events. [2022-07-13 22:00:54,552 INFO L130 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2022-07-13 22:00:54,552 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. [2022-07-13 22:00:54,554 INFO L132 encePairwiseOnDemand]: 1219/1225 looper letters, 69 selfloop transitions, 45 changer transitions 0/1070 dead transitions. [2022-07-13 22:00:54,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1151 places, 1070 transitions, 2901 flow [2022-07-13 22:00:54,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 22:00:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 22:00:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 43637 transitions. [2022-07-13 22:00:54,570 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7916009070294785 [2022-07-13 22:00:54,571 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 43637 transitions. [2022-07-13 22:00:54,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 43637 transitions. [2022-07-13 22:00:54,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:54,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 43637 transitions. [2022-07-13 22:00:54,601 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) [2022-07-13 22:00:54,630 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) [2022-07-13 22:00:54,639 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) [2022-07-13 22:00:54,640 INFO L186 Difference]: Start difference. First operand has 1107 places, 1019 transitions, 2357 flow. Second operand 45 states and 43637 transitions. [2022-07-13 22:00:54,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1151 places, 1070 transitions, 2901 flow [2022-07-13 22:00:54,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1145 places, 1070 transitions, 2861 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 22:00:54,653 INFO L242 Difference]: Finished difference. Result has 1154 places, 1044 transitions, 2635 flow [2022-07-13 22:00:54,653 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} [2022-07-13 22:00:54,653 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 72 predicate places. [2022-07-13 22:00:54,654 INFO L495 AbstractCegarLoop]: Abstraction has has 1154 places, 1044 transitions, 2635 flow [2022-07-13 22:00:54,657 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) [2022-07-13 22:00:54,657 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:54,657 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] [2022-07-13 22:00:54,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-07-13 22:00:54,867 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 [2022-07-13 22:00:54,868 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:54,868 INFO L85 PathProgramCache]: Analyzing trace with hash -323795849, now seen corresponding path program 1 times [2022-07-13 22:00:54,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:54,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549813779] [2022-07-13 22:00:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:54,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:55,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:00:55,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549813779] [2022-07-13 22:00:55,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549813779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:00:55,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350587396] [2022-07-13 22:00:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:55,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:00:55,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:00:55,175 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) [2022-07-13 22:00:55,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-07-13 22:00:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:00:56,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 22:00:56,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:56,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:56,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350587396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:56,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:56,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 22:00:56,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505516845] [2022-07-13 22:00:56,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:56,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 22:00:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 22:00:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 22:00:56,908 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-07-13 22:00:56,927 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) [2022-07-13 22:00:56,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:56,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-07-13 22:00:56,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:58,862 INFO L129 PetriNetUnfolder]: 0/1353 cut-off events. [2022-07-13 22:00:58,863 INFO L130 PetriNetUnfolder]: For 2708/2708 co-relation queries the response was YES. [2022-07-13 22:00:58,863 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. [2022-07-13 22:00:58,865 INFO L132 encePairwiseOnDemand]: 1219/1225 looper letters, 101 selfloop transitions, 93 changer transitions 0/1150 dead transitions. [2022-07-13 22:00:58,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1246 places, 1150 transitions, 3871 flow [2022-07-13 22:00:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-13 22:00:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-13 22:00:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 90141 transitions. [2022-07-13 22:00:58,900 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.791231073074391 [2022-07-13 22:00:58,901 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 90141 transitions. [2022-07-13 22:00:58,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 90141 transitions. [2022-07-13 22:00:58,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:00:58,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 90141 transitions. [2022-07-13 22:00:58,965 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) [2022-07-13 22:00:59,022 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) [2022-07-13 22:00:59,040 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) [2022-07-13 22:00:59,041 INFO L186 Difference]: Start difference. First operand has 1154 places, 1044 transitions, 2635 flow. Second operand 93 states and 90141 transitions. [2022-07-13 22:00:59,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1246 places, 1150 transitions, 3871 flow [2022-07-13 22:00:59,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1228 places, 1150 transitions, 3783 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-13 22:00:59,059 INFO L242 Difference]: Finished difference. Result has 1245 places, 1093 transitions, 3269 flow [2022-07-13 22:00:59,060 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} [2022-07-13 22:00:59,060 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 163 predicate places. [2022-07-13 22:00:59,061 INFO L495 AbstractCegarLoop]: Abstraction has has 1245 places, 1093 transitions, 3269 flow [2022-07-13 22:00:59,067 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) [2022-07-13 22:00:59,067 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:00:59,067 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] [2022-07-13 22:00:59,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-07-13 22:00:59,285 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 [2022-07-13 22:00:59,285 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:00:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:00:59,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1708288287, now seen corresponding path program 1 times [2022-07-13 22:00:59,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:00:59,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242643935] [2022-07-13 22:00:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:00:59,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:00:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:00,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242643935] [2022-07-13 22:01:00,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242643935] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:01:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694561632] [2022-07-13 22:01:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:00,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:01:00,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:01:00,025 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) [2022-07-13 22:01:00,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-07-13 22:01:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:01,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-13 22:01:01,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:01:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:01,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:01:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:03,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694561632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:01:03,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:01:03,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-13 22:01:03,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435655609] [2022-07-13 22:01:03,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:01:03,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-13 22:01:03,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:03,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-13 22:01:03,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-13 22:01:03,334 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-07-13 22:01:03,370 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) [2022-07-13 22:01:03,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:03,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-07-13 22:01:03,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:06,072 INFO L129 PetriNetUnfolder]: 0/1298 cut-off events. [2022-07-13 22:01:06,072 INFO L130 PetriNetUnfolder]: For 3183/3183 co-relation queries the response was YES. [2022-07-13 22:01:06,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 1298 events. 0/1298 cut-off events. For 3183/3183 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3325 event pairs, 0 based on Foata normal form. 5/1303 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-07-13 22:01:06,075 INFO L132 encePairwiseOnDemand]: 1220/1225 looper letters, 108 selfloop transitions, 106 changer transitions 0/1160 dead transitions. [2022-07-13 22:01:06,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1341 places, 1160 transitions, 4247 flow [2022-07-13 22:01:06,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-13 22:01:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-07-13 22:01:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 104655 transitions. [2022-07-13 22:01:06,114 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7910430839002267 [2022-07-13 22:01:06,115 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 104655 transitions. [2022-07-13 22:01:06,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 104655 transitions. [2022-07-13 22:01:06,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:06,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 104655 transitions. [2022-07-13 22:01:06,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 969.0277777777778) internal successors, (104655), 108 states have internal predecessors, (104655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:06,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 1225.0) internal successors, (133525), 109 states have internal predecessors, (133525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:06,281 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 1225.0) internal successors, (133525), 109 states have internal predecessors, (133525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:06,281 INFO L186 Difference]: Start difference. First operand has 1245 places, 1093 transitions, 3269 flow. Second operand 108 states and 104655 transitions. [2022-07-13 22:01:06,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1341 places, 1160 transitions, 4247 flow [2022-07-13 22:01:06,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1268 places, 1160 transitions, 3885 flow, removed 22 selfloop flow, removed 73 redundant places. [2022-07-13 22:01:06,531 INFO L242 Difference]: Finished difference. Result has 1268 places, 1094 transitions, 3249 flow [2022-07-13 22:01:06,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=1161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=3249, PETRI_PLACES=1268, PETRI_TRANSITIONS=1094} [2022-07-13 22:01:06,532 INFO L279 CegarLoopForPetriNet]: 1082 programPoint places, 186 predicate places. [2022-07-13 22:01:06,532 INFO L495 AbstractCegarLoop]: Abstraction has has 1268 places, 1094 transitions, 3249 flow [2022-07-13 22:01:06,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-13 22:01:06,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:06,553 INFO L200 CegarLoopForPetriNet]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:01:06,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-07-13 22:01:06,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:01:06,767 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:01:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1308242903, now seen corresponding path program 1 times [2022-07-13 22:01:06,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:06,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819171572] [2022-07-13 22:01:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:06,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:01:06,818 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 22:01:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:01:06,960 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 22:01:06,961 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 22:01:06,961 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 22:01:06,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 22:01:06,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-07-13 22:01:06,961 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:01:06,962 WARN L231 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 22:01:06,962 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2022-07-13 22:01:07,019 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 22:01:07,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1111 places, 1258 transitions, 3956 flow [2022-07-13 22:01:08,296 INFO L129 PetriNetUnfolder]: 364/2549 cut-off events. [2022-07-13 22:01:08,296 INFO L130 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2022-07-13 22:01:08,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3324 conditions, 2549 events. 364/2549 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9352 event pairs, 0 based on Foata normal form. 0/2111 useless extension candidates. Maximal degree in co-relation 3188. Up to 74 conditions per place. [2022-07-13 22:01:08,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 1111 places, 1258 transitions, 3956 flow [2022-07-13 22:01:08,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1111 places, 1258 transitions, 3956 flow [2022-07-13 22:01:08,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:01:08,498 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@643b6830, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@760f0c62 [2022-07-13 22:01:08,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 22:01:08,502 INFO L129 PetriNetUnfolder]: 2/71 cut-off events. [2022-07-13 22:01:08,502 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 22:01:08,502 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:08,502 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] [2022-07-13 22:01:08,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:01:08,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1845321377, now seen corresponding path program 1 times [2022-07-13 22:01:08,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:08,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463834857] [2022-07-13 22:01:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:08,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:08,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:08,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463834857] [2022-07-13 22:01:08,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463834857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:01:08,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:01:08,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:01:08,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129084012] [2022-07-13 22:01:08,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:01:08,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:01:08,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:08,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:01:08,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:01:08,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1001 out of 1258 [2022-07-13 22:01:08,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 1258 transitions, 3956 flow. Second operand has 2 states, 2 states have (on average 1001.5) internal successors, (2003), 2 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:08,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:08,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1001 of 1258 [2022-07-13 22:01:08,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:09,732 INFO L129 PetriNetUnfolder]: 0/2148 cut-off events. [2022-07-13 22:01:09,732 INFO L130 PetriNetUnfolder]: For 9066/9066 co-relation queries the response was YES. [2022-07-13 22:01:09,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 2148 events. 0/2148 cut-off events. For 9066/9066 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8903 event pairs, 0 based on Foata normal form. 3936/6010 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-07-13 22:01:09,735 INFO L132 encePairwiseOnDemand]: 1038/1258 looper letters, 36 selfloop transitions, 0 changer transitions 11/1037 dead transitions. [2022-07-13 22:01:09,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1111 places, 1037 transitions, 3586 flow [2022-07-13 22:01:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:01:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:01:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2258 transitions. [2022-07-13 22:01:09,746 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8974562798092209 [2022-07-13 22:01:09,746 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2258 transitions. [2022-07-13 22:01:09,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2258 transitions. [2022-07-13 22:01:09,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:09,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2258 transitions. [2022-07-13 22:01:09,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1129.0) internal successors, (2258), 2 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:09,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1258.0) internal successors, (3774), 3 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:09,750 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1258.0) internal successors, (3774), 3 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:09,750 INFO L186 Difference]: Start difference. First operand has 1111 places, 1258 transitions, 3956 flow. Second operand 2 states and 2258 transitions. [2022-07-13 22:01:09,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1111 places, 1037 transitions, 3586 flow [2022-07-13 22:01:09,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1111 places, 1037 transitions, 2326 flow, removed 630 selfloop flow, removed 0 redundant places. [2022-07-13 22:01:09,771 INFO L242 Difference]: Finished difference. Result has 1111 places, 1026 transitions, 2232 flow [2022-07-13 22:01:09,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=1110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1037, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2232, PETRI_PLACES=1111, PETRI_TRANSITIONS=1026} [2022-07-13 22:01:09,772 INFO L279 CegarLoopForPetriNet]: 1111 programPoint places, 0 predicate places. [2022-07-13 22:01:09,772 INFO L495 AbstractCegarLoop]: Abstraction has has 1111 places, 1026 transitions, 2232 flow [2022-07-13 22:01:09,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1001.5) internal successors, (2003), 2 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:09,772 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:09,772 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] [2022-07-13 22:01:09,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-07-13 22:01:09,773 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:01:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:09,773 INFO L85 PathProgramCache]: Analyzing trace with hash 48370018, now seen corresponding path program 1 times [2022-07-13 22:01:09,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:09,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350795526] [2022-07-13 22:01:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:09,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:09,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:09,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350795526] [2022-07-13 22:01:09,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350795526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:01:09,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:01:09,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:01:09,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267333875] [2022-07-13 22:01:09,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:01:09,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:01:09,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:01:09,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:01:09,813 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 994 out of 1258 [2022-07-13 22:01:09,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 1026 transitions, 2232 flow. Second operand has 3 states, 3 states have (on average 995.0) internal successors, (2985), 3 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:09,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:09,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 994 of 1258 [2022-07-13 22:01:09,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:10,904 INFO L129 PetriNetUnfolder]: 0/1730 cut-off events. [2022-07-13 22:01:10,905 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-07-13 22:01:10,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 1730 events. 0/1730 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5981 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 0. Up to 216 conditions per place. [2022-07-13 22:01:10,908 INFO L132 encePairwiseOnDemand]: 1255/1258 looper letters, 45 selfloop transitions, 2 changer transitions 0/1030 dead transitions. [2022-07-13 22:01:10,908 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 1030 transitions, 2334 flow [2022-07-13 22:01:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:01:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:01:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3030 transitions. [2022-07-13 22:01:10,911 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8028616852146264 [2022-07-13 22:01:10,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3030 transitions. [2022-07-13 22:01:10,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3030 transitions. [2022-07-13 22:01:10,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:10,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3030 transitions. [2022-07-13 22:01:10,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1010.0) internal successors, (3030), 3 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:10,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1258.0) internal successors, (5032), 4 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:10,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1258.0) internal successors, (5032), 4 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:10,916 INFO L186 Difference]: Start difference. First operand has 1111 places, 1026 transitions, 2232 flow. Second operand 3 states and 3030 transitions. [2022-07-13 22:01:10,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1102 places, 1030 transitions, 2334 flow [2022-07-13 22:01:10,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1102 places, 1030 transitions, 2334 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:01:10,925 INFO L242 Difference]: Finished difference. Result has 1103 places, 1027 transitions, 2244 flow [2022-07-13 22:01:10,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2232, PETRI_DIFFERENCE_MINUEND_PLACES=1100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2244, PETRI_PLACES=1103, PETRI_TRANSITIONS=1027} [2022-07-13 22:01:10,926 INFO L279 CegarLoopForPetriNet]: 1111 programPoint places, -8 predicate places. [2022-07-13 22:01:10,926 INFO L495 AbstractCegarLoop]: Abstraction has has 1103 places, 1027 transitions, 2244 flow [2022-07-13 22:01:10,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 995.0) internal successors, (2985), 3 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:10,927 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:10,927 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] [2022-07-13 22:01:10,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-07-13 22:01:10,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:01:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:10,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1626774762, now seen corresponding path program 1 times [2022-07-13 22:01:10,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:10,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442070030] [2022-07-13 22:01:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:10,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442070030] [2022-07-13 22:01:10,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442070030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:01:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900348399] [2022-07-13 22:01:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:10,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:01:10,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:01:10,962 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:01:10,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-07-13 22:01:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:12,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:01:12,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:01:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:12,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:01:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:12,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900348399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:01:12,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:01:12,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 22:01:12,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122650222] [2022-07-13 22:01:12,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:01:12,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:01:12,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:12,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:01:12,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:01:12,083 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-07-13 22:01:12,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1103 places, 1027 transitions, 2244 flow. Second operand has 10 states, 10 states have (on average 995.3) internal successors, (9953), 10 states have internal predecessors, (9953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:12,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:12,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-07-13 22:01:12,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:13,180 INFO L129 PetriNetUnfolder]: 0/1708 cut-off events. [2022-07-13 22:01:13,181 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-07-13 22:01:13,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2183 conditions, 1708 events. 0/1708 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5877 event pairs, 0 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2022-07-13 22:01:13,183 INFO L132 encePairwiseOnDemand]: 1252/1258 looper letters, 46 selfloop transitions, 9 changer transitions 0/1037 dead transitions. [2022-07-13 22:01:13,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1111 places, 1037 transitions, 2376 flow [2022-07-13 22:01:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:01:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:01:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8994 transitions. [2022-07-13 22:01:13,187 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7943826179120297 [2022-07-13 22:01:13,188 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8994 transitions. [2022-07-13 22:01:13,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8994 transitions. [2022-07-13 22:01:13,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:13,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8994 transitions. [2022-07-13 22:01:13,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 999.3333333333334) internal successors, (8994), 9 states have internal predecessors, (8994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:13,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1258.0) internal successors, (12580), 10 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:13,198 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1258.0) internal successors, (12580), 10 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:13,199 INFO L186 Difference]: Start difference. First operand has 1103 places, 1027 transitions, 2244 flow. Second operand 9 states and 8994 transitions. [2022-07-13 22:01:13,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1111 places, 1037 transitions, 2376 flow [2022-07-13 22:01:13,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1110 places, 1037 transitions, 2374 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:01:13,208 INFO L242 Difference]: Finished difference. Result has 1113 places, 1033 transitions, 2292 flow [2022-07-13 22:01:13,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=1102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1021, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2292, PETRI_PLACES=1113, PETRI_TRANSITIONS=1033} [2022-07-13 22:01:13,209 INFO L279 CegarLoopForPetriNet]: 1111 programPoint places, 2 predicate places. [2022-07-13 22:01:13,209 INFO L495 AbstractCegarLoop]: Abstraction has has 1113 places, 1033 transitions, 2292 flow [2022-07-13 22:01:13,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 995.3) internal successors, (9953), 10 states have internal predecessors, (9953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:13,210 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:13,210 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] [2022-07-13 22:01:13,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-07-13 22:01:13,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-07-13 22:01:13,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:01:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1571594175, now seen corresponding path program 1 times [2022-07-13 22:01:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:13,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119417744] [2022-07-13 22:01:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:13,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:13,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119417744] [2022-07-13 22:01:13,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119417744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:01:13,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078280962] [2022-07-13 22:01:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:13,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:01:13,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:01:13,476 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:01:13,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-07-13 22:01:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:14,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:01:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:01:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:14,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:01:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:14,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078280962] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:01:14,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:01:14,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 22:01:14,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722018905] [2022-07-13 22:01:14,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:01:14,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 22:01:14,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:14,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 22:01:14,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 22:01:14,632 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-07-13 22:01:14,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1113 places, 1033 transitions, 2292 flow. Second operand has 18 states, 18 states have (on average 995.6111111111111) internal successors, (17921), 18 states have internal predecessors, (17921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:14,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:14,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-07-13 22:01:14,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:15,805 INFO L129 PetriNetUnfolder]: 0/1664 cut-off events. [2022-07-13 22:01:15,805 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-13 22:01:15,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 1664 events. 0/1664 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5564 event pairs, 0 based on Foata normal form. 4/1668 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-07-13 22:01:15,808 INFO L132 encePairwiseOnDemand]: 1252/1258 looper letters, 54 selfloop transitions, 21 changer transitions 0/1057 dead transitions. [2022-07-13 22:01:15,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1133 places, 1057 transitions, 2550 flow [2022-07-13 22:01:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 22:01:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 22:01:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20932 transitions. [2022-07-13 22:01:15,817 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923385570444395 [2022-07-13 22:01:15,817 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20932 transitions. [2022-07-13 22:01:15,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20932 transitions. [2022-07-13 22:01:15,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:15,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20932 transitions. [2022-07-13 22:01:15,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 996.7619047619048) internal successors, (20932), 21 states have internal predecessors, (20932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:15,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1258.0) internal successors, (27676), 22 states have internal predecessors, (27676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:15,943 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1258.0) internal successors, (27676), 22 states have internal predecessors, (27676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:15,943 INFO L186 Difference]: Start difference. First operand has 1113 places, 1033 transitions, 2292 flow. Second operand 21 states and 20932 transitions. [2022-07-13 22:01:15,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1133 places, 1057 transitions, 2550 flow [2022-07-13 22:01:15,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1132 places, 1057 transitions, 2536 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 22:01:15,954 INFO L242 Difference]: Finished difference. Result has 1137 places, 1046 transitions, 2416 flow [2022-07-13 22:01:15,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=1112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1022, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2416, PETRI_PLACES=1137, PETRI_TRANSITIONS=1046} [2022-07-13 22:01:15,954 INFO L279 CegarLoopForPetriNet]: 1111 programPoint places, 26 predicate places. [2022-07-13 22:01:15,954 INFO L495 AbstractCegarLoop]: Abstraction has has 1137 places, 1046 transitions, 2416 flow [2022-07-13 22:01:15,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 995.6111111111111) internal successors, (17921), 18 states have internal predecessors, (17921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:15,956 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:15,957 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] [2022-07-13 22:01:15,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-07-13 22:01:16,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-07-13 22:01:16,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:01:16,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash -649199965, now seen corresponding path program 1 times [2022-07-13 22:01:16,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:16,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537574029] [2022-07-13 22:01:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:16,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:16,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537574029] [2022-07-13 22:01:16,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537574029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:01:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248939124] [2022-07-13 22:01:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:16,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:01:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:01:16,281 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:01:16,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-07-13 22:01:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 22:01:17,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:01:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:17,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:01:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:17,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248939124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:01:17,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:01:17,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 22:01:17,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094773012] [2022-07-13 22:01:17,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:01:17,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 22:01:17,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:17,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 22:01:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 22:01:17,672 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-07-13 22:01:17,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1137 places, 1046 transitions, 2416 flow. Second operand has 34 states, 34 states have (on average 995.7941176470588) internal successors, (33857), 34 states have internal predecessors, (33857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:17,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:17,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-07-13 22:01:17,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:19,242 INFO L129 PetriNetUnfolder]: 0/1576 cut-off events. [2022-07-13 22:01:19,242 INFO L130 PetriNetUnfolder]: For 843/843 co-relation queries the response was YES. [2022-07-13 22:01:19,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 1576 events. 0/1576 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5005 event pairs, 0 based on Foata normal form. 8/1584 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-13 22:01:19,245 INFO L132 encePairwiseOnDemand]: 1252/1258 looper letters, 70 selfloop transitions, 45 changer transitions 0/1097 dead transitions. [2022-07-13 22:01:19,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1181 places, 1097 transitions, 2962 flow [2022-07-13 22:01:19,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 22:01:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-13 22:01:19,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 44808 transitions. [2022-07-13 22:01:19,262 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7915209326974033 [2022-07-13 22:01:19,262 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 44808 transitions. [2022-07-13 22:01:19,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 44808 transitions. [2022-07-13 22:01:19,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:19,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 44808 transitions. [2022-07-13 22:01:19,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 995.7333333333333) internal successors, (44808), 45 states have internal predecessors, (44808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:19,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1258.0) internal successors, (57868), 46 states have internal predecessors, (57868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:19,326 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1258.0) internal successors, (57868), 46 states have internal predecessors, (57868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:19,327 INFO L186 Difference]: Start difference. First operand has 1137 places, 1046 transitions, 2416 flow. Second operand 45 states and 44808 transitions. [2022-07-13 22:01:19,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1181 places, 1097 transitions, 2962 flow [2022-07-13 22:01:19,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1175 places, 1097 transitions, 2922 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 22:01:19,339 INFO L242 Difference]: Finished difference. Result has 1184 places, 1071 transitions, 2694 flow [2022-07-13 22:01:19,340 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=1131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1023, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2694, PETRI_PLACES=1184, PETRI_TRANSITIONS=1071} [2022-07-13 22:01:19,340 INFO L279 CegarLoopForPetriNet]: 1111 programPoint places, 73 predicate places. [2022-07-13 22:01:19,340 INFO L495 AbstractCegarLoop]: Abstraction has has 1184 places, 1071 transitions, 2694 flow [2022-07-13 22:01:19,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 995.7941176470588) internal successors, (33857), 34 states have internal predecessors, (33857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:19,343 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:19,343 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] [2022-07-13 22:01:19,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-07-13 22:01:19,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:01:19,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:01:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash 506999703, now seen corresponding path program 1 times [2022-07-13 22:01:19,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:19,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724385345] [2022-07-13 22:01:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:19,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat