./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:33:48,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:33:48,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:33:48,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:33:48,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:33:48,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:33:48,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:33:48,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:33:48,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:33:48,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:33:48,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:33:48,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:33:48,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:33:48,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:33:48,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:33:48,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:33:48,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:33:48,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:33:48,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:33:48,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:33:48,686 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:33:48,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:33:48,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:33:48,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:33:48,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:33:48,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:33:48,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:33:48,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:33:48,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:33:48,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:33:48,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:33:48,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:33:48,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:33:48,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:33:48,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:33:48,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:33:48,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:33:48,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:33:48,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:33:48,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:33:48,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:33:48,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:33:48,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:33:48,734 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:33:48,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:33:48,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:33:48,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:33:48,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:33:48,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:33:48,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:33:48,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:33:48,737 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:33:48,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:33:48,738 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:33:48,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:33:48,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:33:48,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:33:48,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:33:48,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:33:48,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:33:48,739 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:33:48,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:33:48,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:33:48,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:33:48,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:33:48,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:33:48,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:33:48,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:33:48,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:33:48,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:33:48,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:33:48,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:33:48,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:33:48,743 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:33:48,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:33:48,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:33:48,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-07-19 21:33:48,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:33:48,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:33:48,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:33:48,958 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:33:48,959 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:33:48,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-07-19 21:33:49,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d712377/b431166d159e40a7a544359d9e0d7302/FLAG14dd77bdf [2022-07-19 21:33:49,426 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:33:49,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-07-19 21:33:49,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d712377/b431166d159e40a7a544359d9e0d7302/FLAG14dd77bdf [2022-07-19 21:33:49,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d712377/b431166d159e40a7a544359d9e0d7302 [2022-07-19 21:33:49,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:33:49,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:33:49,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:33:49,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:33:49,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:33:49,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3936ba92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49, skipping insertion in model container [2022-07-19 21:33:49,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:33:49,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:33:49,663 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/weaver/popl20-figure1.wvr.c[1991,2004] [2022-07-19 21:33:49,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:33:49,672 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:33:49,701 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/weaver/popl20-figure1.wvr.c[1991,2004] [2022-07-19 21:33:49,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:33:49,720 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:33:49,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49 WrapperNode [2022-07-19 21:33:49,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:33:49,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:33:49,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:33:49,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:33:49,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,756 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-07-19 21:33:49,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:33:49,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:33:49,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:33:49,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:33:49,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:33:49,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:33:49,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:33:49,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:33:49,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:33:49,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:49,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:33:49,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:33:49,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:33:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:33:49,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:33:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:33:49,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:33:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:33:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:33:49,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:33:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:33:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:33:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:33:49,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:33:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:33:49,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:33:49,864 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:33:49,946 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:33:49,947 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:33:50,088 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:33:50,118 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:33:50,118 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:33:50,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:33:50 BoogieIcfgContainer [2022-07-19 21:33:50,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:33:50,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:33:50,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:33:50,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:33:50,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:33:49" (1/3) ... [2022-07-19 21:33:50,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4792e89b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:33:50, skipping insertion in model container [2022-07-19 21:33:50,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (2/3) ... [2022-07-19 21:33:50,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4792e89b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:33:50, skipping insertion in model container [2022-07-19 21:33:50,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:33:50" (3/3) ... [2022-07-19 21:33:50,127 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-07-19 21:33:50,131 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:33:50,137 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:33:50,138 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:33:50,138 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:33:50,178 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:33:50,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2022-07-19 21:33:50,259 INFO L129 PetriNetUnfolder]: 5/75 cut-off events. [2022-07-19 21:33:50,260 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:33:50,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-07-19 21:33:50,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2022-07-19 21:33:50,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2022-07-19 21:33:50,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:33:50,297 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@317dcf6b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@361eaf39 [2022-07-19 21:33:50,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:33:50,332 INFO L129 PetriNetUnfolder]: 5/65 cut-off events. [2022-07-19 21:33:50,332 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:33:50,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:50,333 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:50,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:50,338 INFO L85 PathProgramCache]: Analyzing trace with hash -756496266, now seen corresponding path program 1 times [2022-07-19 21:33:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:50,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999644906] [2022-07-19 21:33:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:50,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:50,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:50,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999644906] [2022-07-19 21:33:50,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999644906] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:50,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:50,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:33:50,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513161240] [2022-07-19 21:33:50,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:50,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:33:50,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:50,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:33:50,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:33:50,557 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 77 [2022-07-19 21:33:50,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 144 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:50,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 77 [2022-07-19 21:33:50,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:50,631 INFO L129 PetriNetUnfolder]: 11/96 cut-off events. [2022-07-19 21:33:50,632 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-19 21:33:50,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 96 events. 11/96 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 155 event pairs, 3 based on Foata normal form. 10/98 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-07-19 21:33:50,636 INFO L132 encePairwiseOnDemand]: 74/77 looper letters, 6 selfloop transitions, 0 changer transitions 1/63 dead transitions. [2022-07-19 21:33:50,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 150 flow [2022-07-19 21:33:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:33:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:33:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 143 transitions. [2022-07-19 21:33:50,649 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2022-07-19 21:33:50,649 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 143 transitions. [2022-07-19 21:33:50,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 143 transitions. [2022-07-19 21:33:50,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:50,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 143 transitions. [2022-07-19 21:33:50,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 71.5) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,665 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,666 INFO L186 Difference]: Start difference. First operand has 68 places, 66 transitions, 144 flow. Second operand 2 states and 143 transitions. [2022-07-19 21:33:50,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 150 flow [2022-07-19 21:33:50,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 142 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:33:50,677 INFO L242 Difference]: Finished difference. Result has 65 places, 62 transitions, 128 flow [2022-07-19 21:33:50,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2022-07-19 21:33:50,682 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2022-07-19 21:33:50,683 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 128 flow [2022-07-19 21:33:50,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,684 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:50,684 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:50,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:33:50,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2091830959, now seen corresponding path program 1 times [2022-07-19 21:33:50,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:50,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236338404] [2022-07-19 21:33:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:50,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:50,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:50,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236338404] [2022-07-19 21:33:50,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236338404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:50,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:50,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:33:50,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158510522] [2022-07-19 21:33:50,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:50,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:33:50,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:33:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:33:50,864 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-07-19 21:33:50,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:50,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-07-19 21:33:50,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:50,973 INFO L129 PetriNetUnfolder]: 8/99 cut-off events. [2022-07-19 21:33:50,974 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:33:50,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 99 events. 8/99 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 171 event pairs, 1 based on Foata normal form. 3/96 useless extension candidates. Maximal degree in co-relation 127. Up to 18 conditions per place. [2022-07-19 21:33:50,975 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 11 selfloop transitions, 2 changer transitions 5/69 dead transitions. [2022-07-19 21:33:50,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 181 flow [2022-07-19 21:33:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:33:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:33:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2022-07-19 21:33:50,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8441558441558441 [2022-07-19 21:33:50,979 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2022-07-19 21:33:50,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2022-07-19 21:33:50,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:50,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2022-07-19 21:33:50,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,983 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,983 INFO L186 Difference]: Start difference. First operand has 65 places, 62 transitions, 128 flow. Second operand 5 states and 325 transitions. [2022-07-19 21:33:50,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 181 flow [2022-07-19 21:33:50,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:33:50,986 INFO L242 Difference]: Finished difference. Result has 71 places, 63 transitions, 146 flow [2022-07-19 21:33:50,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2022-07-19 21:33:50,987 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2022-07-19 21:33:50,987 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 146 flow [2022-07-19 21:33:50,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,988 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:50,988 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:50,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:33:50,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2038057157, now seen corresponding path program 1 times [2022-07-19 21:33:50,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:50,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170258239] [2022-07-19 21:33:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:50,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170258239] [2022-07-19 21:33:51,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170258239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:51,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233696839] [2022-07-19 21:33:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:51,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:51,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:51,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:33:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:51,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:33:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233696839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:51,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:51,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-19 21:33:51,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077587320] [2022-07-19 21:33:51,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:51,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:33:51,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:51,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:33:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:33:51,316 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-19 21:33:51,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 57.55555555555556) internal successors, (518), 9 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:51,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-19 21:33:51,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:51,505 INFO L129 PetriNetUnfolder]: 110/320 cut-off events. [2022-07-19 21:33:51,506 INFO L130 PetriNetUnfolder]: For 27/35 co-relation queries the response was YES. [2022-07-19 21:33:51,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 320 events. 110/320 cut-off events. For 27/35 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1435 event pairs, 11 based on Foata normal form. 2/287 useless extension candidates. Maximal degree in co-relation 611. Up to 41 conditions per place. [2022-07-19 21:33:51,509 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 52 selfloop transitions, 24 changer transitions 5/125 dead transitions. [2022-07-19 21:33:51,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 461 flow [2022-07-19 21:33:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:33:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:33:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 854 transitions. [2022-07-19 21:33:51,514 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2022-07-19 21:33:51,514 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 854 transitions. [2022-07-19 21:33:51,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 854 transitions. [2022-07-19 21:33:51,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:51,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 854 transitions. [2022-07-19 21:33:51,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,520 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,520 INFO L186 Difference]: Start difference. First operand has 71 places, 63 transitions, 146 flow. Second operand 14 states and 854 transitions. [2022-07-19 21:33:51,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 461 flow [2022-07-19 21:33:51,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 125 transitions, 453 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:33:51,524 INFO L242 Difference]: Finished difference. Result has 86 places, 87 transitions, 288 flow [2022-07-19 21:33:51,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=288, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2022-07-19 21:33:51,525 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 18 predicate places. [2022-07-19 21:33:51,525 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 288 flow [2022-07-19 21:33:51,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.55555555555556) internal successors, (518), 9 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:51,526 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:51,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:51,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:51,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:51,749 INFO L85 PathProgramCache]: Analyzing trace with hash -465536495, now seen corresponding path program 2 times [2022-07-19 21:33:51,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:51,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558184657] [2022-07-19 21:33:51,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:51,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:51,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558184657] [2022-07-19 21:33:51,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558184657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:51,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:51,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:33:51,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899533484] [2022-07-19 21:33:51,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:51,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:33:51,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:33:51,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:33:51,809 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-19 21:33:51,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:51,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-19 21:33:51,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:51,888 INFO L129 PetriNetUnfolder]: 116/321 cut-off events. [2022-07-19 21:33:51,888 INFO L130 PetriNetUnfolder]: For 290/290 co-relation queries the response was YES. [2022-07-19 21:33:51,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 321 events. 116/321 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1414 event pairs, 48 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 869. Up to 162 conditions per place. [2022-07-19 21:33:51,891 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 50 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2022-07-19 21:33:51,891 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 504 flow [2022-07-19 21:33:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:33:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:33:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2022-07-19 21:33:51,893 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2022-07-19 21:33:51,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2022-07-19 21:33:51,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2022-07-19 21:33:51,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:51,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2022-07-19 21:33:51,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,895 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,895 INFO L186 Difference]: Start difference. First operand has 86 places, 87 transitions, 288 flow. Second operand 5 states and 317 transitions. [2022-07-19 21:33:51,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 504 flow [2022-07-19 21:33:51,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 107 transitions, 502 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:33:51,900 INFO L242 Difference]: Finished difference. Result has 92 places, 92 transitions, 357 flow [2022-07-19 21:33:51,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2022-07-19 21:33:51,901 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 24 predicate places. [2022-07-19 21:33:51,901 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 357 flow [2022-07-19 21:33:51,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,902 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:51,902 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:51,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:33:51,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 88617565, now seen corresponding path program 3 times [2022-07-19 21:33:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:51,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464657243] [2022-07-19 21:33:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:51,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:51,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464657243] [2022-07-19 21:33:51,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464657243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:51,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273425637] [2022-07-19 21:33:51,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:33:51,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:51,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:51,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:51,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:33:52,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:33:52,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:52,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:33:52,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:52,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:52,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273425637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:52,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:52,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-19 21:33:52,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609297903] [2022-07-19 21:33:52,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:52,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:33:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:33:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:33:52,168 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-19 21:33:52,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 357 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:52,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-19 21:33:52,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:52,338 INFO L129 PetriNetUnfolder]: 166/507 cut-off events. [2022-07-19 21:33:52,339 INFO L130 PetriNetUnfolder]: For 671/673 co-relation queries the response was YES. [2022-07-19 21:33:52,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 507 events. 166/507 cut-off events. For 671/673 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2613 event pairs, 36 based on Foata normal form. 9/509 useless extension candidates. Maximal degree in co-relation 1363. Up to 114 conditions per place. [2022-07-19 21:33:52,343 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 66 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2022-07-19 21:33:52,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 839 flow [2022-07-19 21:33:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:33:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:33:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 564 transitions. [2022-07-19 21:33:52,346 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138528138528138 [2022-07-19 21:33:52,346 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 564 transitions. [2022-07-19 21:33:52,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 564 transitions. [2022-07-19 21:33:52,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:52,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 564 transitions. [2022-07-19 21:33:52,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.666666666666664) internal successors, (564), 9 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,349 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,349 INFO L186 Difference]: Start difference. First operand has 92 places, 92 transitions, 357 flow. Second operand 9 states and 564 transitions. [2022-07-19 21:33:52,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 839 flow [2022-07-19 21:33:52,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 823 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:33:52,356 INFO L242 Difference]: Finished difference. Result has 104 places, 112 transitions, 598 flow [2022-07-19 21:33:52,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=598, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2022-07-19 21:33:52,357 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2022-07-19 21:33:52,357 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 598 flow [2022-07-19 21:33:52,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,358 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:52,358 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:52,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:52,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:52,582 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:52,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1808089009, now seen corresponding path program 4 times [2022-07-19 21:33:52,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:52,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996505451] [2022-07-19 21:33:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:52,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:52,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:52,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996505451] [2022-07-19 21:33:52,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996505451] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:52,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846000153] [2022-07-19 21:33:52,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:33:52,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:52,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:52,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:52,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:33:52,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:33:52,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:33:52,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:52,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:52,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846000153] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:52,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:52,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-19 21:33:52,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466740174] [2022-07-19 21:33:52,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:52,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:33:52,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:52,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:33:52,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:33:52,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-19 21:33:52,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 598 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:52,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-19 21:33:52,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:53,041 INFO L129 PetriNetUnfolder]: 201/614 cut-off events. [2022-07-19 21:33:53,041 INFO L130 PetriNetUnfolder]: For 1320/1324 co-relation queries the response was YES. [2022-07-19 21:33:53,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 614 events. 201/614 cut-off events. For 1320/1324 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3490 event pairs, 21 based on Foata normal form. 11/619 useless extension candidates. Maximal degree in co-relation 1829. Up to 106 conditions per place. [2022-07-19 21:33:53,047 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 63 selfloop transitions, 52 changer transitions 1/160 dead transitions. [2022-07-19 21:33:53,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1069 flow [2022-07-19 21:33:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:33:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:33:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 743 transitions. [2022-07-19 21:33:53,050 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8041125541125541 [2022-07-19 21:33:53,050 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 743 transitions. [2022-07-19 21:33:53,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 743 transitions. [2022-07-19 21:33:53,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:53,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 743 transitions. [2022-07-19 21:33:53,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,054 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,055 INFO L186 Difference]: Start difference. First operand has 104 places, 112 transitions, 598 flow. Second operand 12 states and 743 transitions. [2022-07-19 21:33:53,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1069 flow [2022-07-19 21:33:53,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 160 transitions, 1063 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-19 21:33:53,063 INFO L242 Difference]: Finished difference. Result has 118 places, 122 transitions, 800 flow [2022-07-19 21:33:53,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=800, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2022-07-19 21:33:53,064 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2022-07-19 21:33:53,064 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 800 flow [2022-07-19 21:33:53,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,065 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:53,065 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:53,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:53,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:53,284 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:53,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1386634823, now seen corresponding path program 5 times [2022-07-19 21:33:53,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:53,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514574924] [2022-07-19 21:33:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:53,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:53,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:53,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514574924] [2022-07-19 21:33:53,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514574924] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:53,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:53,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:33:53,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269992061] [2022-07-19 21:33:53,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:53,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:33:53,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:53,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:33:53,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:33:53,332 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-19 21:33:53,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 800 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:53,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-19 21:33:53,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:53,448 INFO L129 PetriNetUnfolder]: 200/606 cut-off events. [2022-07-19 21:33:53,448 INFO L130 PetriNetUnfolder]: For 1751/1755 co-relation queries the response was YES. [2022-07-19 21:33:53,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 606 events. 200/606 cut-off events. For 1751/1755 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3432 event pairs, 92 based on Foata normal form. 1/598 useless extension candidates. Maximal degree in co-relation 1993. Up to 248 conditions per place. [2022-07-19 21:33:53,455 INFO L132 encePairwiseOnDemand]: 70/77 looper letters, 75 selfloop transitions, 22 changer transitions 1/142 dead transitions. [2022-07-19 21:33:53,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 142 transitions, 1121 flow [2022-07-19 21:33:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:33:53,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:33:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 369 transitions. [2022-07-19 21:33:53,457 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7987012987012987 [2022-07-19 21:33:53,457 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 369 transitions. [2022-07-19 21:33:53,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 369 transitions. [2022-07-19 21:33:53,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:53,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 369 transitions. [2022-07-19 21:33:53,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.5) internal successors, (369), 6 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,460 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,460 INFO L186 Difference]: Start difference. First operand has 118 places, 122 transitions, 800 flow. Second operand 6 states and 369 transitions. [2022-07-19 21:33:53,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 142 transitions, 1121 flow [2022-07-19 21:33:53,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 142 transitions, 1094 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-07-19 21:33:53,470 INFO L242 Difference]: Finished difference. Result has 122 places, 123 transitions, 866 flow [2022-07-19 21:33:53,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=866, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2022-07-19 21:33:53,471 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2022-07-19 21:33:53,471 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 866 flow [2022-07-19 21:33:53,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,472 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:53,472 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:53,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:33:53,472 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:53,473 INFO L85 PathProgramCache]: Analyzing trace with hash -172972305, now seen corresponding path program 6 times [2022-07-19 21:33:53,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:53,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958819660] [2022-07-19 21:33:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:53,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:53,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:53,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958819660] [2022-07-19 21:33:53,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958819660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:53,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:53,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:33:53,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227206223] [2022-07-19 21:33:53,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:53,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:33:53,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:53,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:33:53,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:33:53,545 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-19 21:33:53,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 866 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:53,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-19 21:33:53,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:53,672 INFO L129 PetriNetUnfolder]: 199/571 cut-off events. [2022-07-19 21:33:53,672 INFO L130 PetriNetUnfolder]: For 1971/1975 co-relation queries the response was YES. [2022-07-19 21:33:53,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2034 conditions, 571 events. 199/571 cut-off events. For 1971/1975 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3133 event pairs, 90 based on Foata normal form. 1/562 useless extension candidates. Maximal degree in co-relation 2007. Up to 231 conditions per place. [2022-07-19 21:33:53,677 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 68 selfloop transitions, 23 changer transitions 2/137 dead transitions. [2022-07-19 21:33:53,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 1127 flow [2022-07-19 21:33:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:33:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:33:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2022-07-19 21:33:53,679 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-07-19 21:33:53,679 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2022-07-19 21:33:53,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2022-07-19 21:33:53,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:53,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2022-07-19 21:33:53,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,681 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,681 INFO L186 Difference]: Start difference. First operand has 122 places, 123 transitions, 866 flow. Second operand 5 states and 315 transitions. [2022-07-19 21:33:53,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 1127 flow [2022-07-19 21:33:53,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1092 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-19 21:33:53,695 INFO L242 Difference]: Finished difference. Result has 123 places, 122 transitions, 855 flow [2022-07-19 21:33:53,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=855, PETRI_PLACES=123, PETRI_TRANSITIONS=122} [2022-07-19 21:33:53,698 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 55 predicate places. [2022-07-19 21:33:53,698 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 122 transitions, 855 flow [2022-07-19 21:33:53,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,698 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:53,698 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:53,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:33:53,699 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:53,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:53,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1441489239, now seen corresponding path program 1 times [2022-07-19 21:33:53,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:53,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684759786] [2022-07-19 21:33:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:53,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:33:53,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:53,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684759786] [2022-07-19 21:33:53,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684759786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:53,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622838755] [2022-07-19 21:33:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:53,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:53,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:53,825 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:53,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:33:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:33:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:33:53,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:33:54,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622838755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:54,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:54,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-07-19 21:33:54,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093219632] [2022-07-19 21:33:54,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:54,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:33:54,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:54,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:33:54,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:33:54,035 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-07-19 21:33:54,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 122 transitions, 855 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:54,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:54,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-07-19 21:33:54,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:54,157 INFO L129 PetriNetUnfolder]: 114/633 cut-off events. [2022-07-19 21:33:54,158 INFO L130 PetriNetUnfolder]: For 1210/1248 co-relation queries the response was YES. [2022-07-19 21:33:54,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 633 events. 114/633 cut-off events. For 1210/1248 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4261 event pairs, 16 based on Foata normal form. 19/640 useless extension candidates. Maximal degree in co-relation 1726. Up to 80 conditions per place. [2022-07-19 21:33:54,163 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 18 selfloop transitions, 5 changer transitions 5/137 dead transitions. [2022-07-19 21:33:54,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 137 transitions, 945 flow [2022-07-19 21:33:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:33:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:33:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2022-07-19 21:33:54,164 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.854978354978355 [2022-07-19 21:33:54,164 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2022-07-19 21:33:54,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2022-07-19 21:33:54,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:54,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2022-07-19 21:33:54,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:54,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:54,167 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:54,167 INFO L186 Difference]: Start difference. First operand has 123 places, 122 transitions, 855 flow. Second operand 6 states and 395 transitions. [2022-07-19 21:33:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 137 transitions, 945 flow [2022-07-19 21:33:54,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 137 transitions, 837 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-07-19 21:33:54,175 INFO L242 Difference]: Finished difference. Result has 119 places, 124 transitions, 779 flow [2022-07-19 21:33:54,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2022-07-19 21:33:54,176 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 51 predicate places. [2022-07-19 21:33:54,176 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 779 flow [2022-07-19 21:33:54,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:54,177 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:54,177 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:54,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:54,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:54,395 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:54,396 INFO L85 PathProgramCache]: Analyzing trace with hash 886319805, now seen corresponding path program 2 times [2022-07-19 21:33:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:54,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460941982] [2022-07-19 21:33:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:54,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:54,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:54,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460941982] [2022-07-19 21:33:54,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460941982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:54,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500631364] [2022-07-19 21:33:54,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:33:54,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:54,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:54,465 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:54,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:33:54,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:33:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:54,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:33:54,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:54,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:54,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500631364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:54,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:54,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-07-19 21:33:54,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721352726] [2022-07-19 21:33:54,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:54,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:33:54,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:33:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:33:54,762 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:33:54,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 779 flow. Second operand has 21 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:54,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:54,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:33:54,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:55,209 INFO L129 PetriNetUnfolder]: 478/1432 cut-off events. [2022-07-19 21:33:55,209 INFO L130 PetriNetUnfolder]: For 2697/2697 co-relation queries the response was YES. [2022-07-19 21:33:55,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1432 events. 478/1432 cut-off events. For 2697/2697 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10471 event pairs, 159 based on Foata normal form. 1/1424 useless extension candidates. Maximal degree in co-relation 4656. Up to 556 conditions per place. [2022-07-19 21:33:55,220 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 74 selfloop transitions, 47 changer transitions 8/171 dead transitions. [2022-07-19 21:33:55,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 171 transitions, 1299 flow [2022-07-19 21:33:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 21:33:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-19 21:33:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 924 transitions. [2022-07-19 21:33:55,223 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-07-19 21:33:55,223 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 924 transitions. [2022-07-19 21:33:55,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 924 transitions. [2022-07-19 21:33:55,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:55,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 924 transitions. [2022-07-19 21:33:55,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:55,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:55,228 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:55,228 INFO L186 Difference]: Start difference. First operand has 119 places, 124 transitions, 779 flow. Second operand 16 states and 924 transitions. [2022-07-19 21:33:55,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 171 transitions, 1299 flow [2022-07-19 21:33:55,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 171 transitions, 1283 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-19 21:33:55,237 INFO L242 Difference]: Finished difference. Result has 138 places, 137 transitions, 1000 flow [2022-07-19 21:33:55,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1000, PETRI_PLACES=138, PETRI_TRANSITIONS=137} [2022-07-19 21:33:55,238 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 70 predicate places. [2022-07-19 21:33:55,238 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 137 transitions, 1000 flow [2022-07-19 21:33:55,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:55,239 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:55,239 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:55,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:55,459 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,SelfDestructingSolverStorable9 [2022-07-19 21:33:55,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:55,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:55,460 INFO L85 PathProgramCache]: Analyzing trace with hash -247580723, now seen corresponding path program 3 times [2022-07-19 21:33:55,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:55,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726387854] [2022-07-19 21:33:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:55,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:55,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:55,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726387854] [2022-07-19 21:33:55,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726387854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:55,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195579021] [2022-07-19 21:33:55,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:33:55,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:55,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:55,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:55,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:33:55,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:33:55,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:55,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:33:55,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:55,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:55,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195579021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:55,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:55,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-19 21:33:55,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034294704] [2022-07-19 21:33:55,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:55,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:33:55,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:55,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:33:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:33:55,779 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:33:55,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 137 transitions, 1000 flow. Second operand has 16 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:55,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:55,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:33:55,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:56,477 INFO L129 PetriNetUnfolder]: 637/1823 cut-off events. [2022-07-19 21:33:56,478 INFO L130 PetriNetUnfolder]: For 5334/5334 co-relation queries the response was YES. [2022-07-19 21:33:56,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 1823 events. 637/1823 cut-off events. For 5334/5334 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13817 event pairs, 119 based on Foata normal form. 17/1832 useless extension candidates. Maximal degree in co-relation 6858. Up to 359 conditions per place. [2022-07-19 21:33:56,493 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 124 selfloop transitions, 120 changer transitions 30/316 dead transitions. [2022-07-19 21:33:56,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 316 transitions, 2973 flow [2022-07-19 21:33:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 21:33:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-19 21:33:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1355 transitions. [2022-07-19 21:33:56,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7651044607566346 [2022-07-19 21:33:56,497 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1355 transitions. [2022-07-19 21:33:56,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1355 transitions. [2022-07-19 21:33:56,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:56,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1355 transitions. [2022-07-19 21:33:56,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.91304347826087) internal successors, (1355), 23 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:56,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:56,505 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:56,505 INFO L186 Difference]: Start difference. First operand has 138 places, 137 transitions, 1000 flow. Second operand 23 states and 1355 transitions. [2022-07-19 21:33:56,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 316 transitions, 2973 flow [2022-07-19 21:33:56,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 316 transitions, 2872 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-07-19 21:33:56,524 INFO L242 Difference]: Finished difference. Result has 164 places, 208 transitions, 1906 flow [2022-07-19 21:33:56,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1906, PETRI_PLACES=164, PETRI_TRANSITIONS=208} [2022-07-19 21:33:56,525 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2022-07-19 21:33:56,525 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 208 transitions, 1906 flow [2022-07-19 21:33:56,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:56,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:56,526 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:56,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:56,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:56,740 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash -125754799, now seen corresponding path program 4 times [2022-07-19 21:33:56,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:56,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416368766] [2022-07-19 21:33:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:56,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:56,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:56,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416368766] [2022-07-19 21:33:56,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416368766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419868485] [2022-07-19 21:33:56,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:33:56,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:56,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:56,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:56,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:33:56,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:33:56,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:33:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:57,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:57,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419868485] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:57,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:57,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:33:57,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156382098] [2022-07-19 21:33:57,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:57,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:33:57,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:57,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:33:57,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:33:57,082 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:33:57,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 208 transitions, 1906 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:57,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:57,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:33:57,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:57,992 INFO L129 PetriNetUnfolder]: 886/2464 cut-off events. [2022-07-19 21:33:57,992 INFO L130 PetriNetUnfolder]: For 11800/11800 co-relation queries the response was YES. [2022-07-19 21:33:58,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10935 conditions, 2464 events. 886/2464 cut-off events. For 11800/11800 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19710 event pairs, 97 based on Foata normal form. 21/2472 useless extension candidates. Maximal degree in co-relation 10896. Up to 401 conditions per place. [2022-07-19 21:33:58,054 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 151 selfloop transitions, 203 changer transitions 3/399 dead transitions. [2022-07-19 21:33:58,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 399 transitions, 4299 flow [2022-07-19 21:33:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 21:33:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-19 21:33:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1753 transitions. [2022-07-19 21:33:58,057 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7588744588744589 [2022-07-19 21:33:58,057 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1753 transitions. [2022-07-19 21:33:58,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1753 transitions. [2022-07-19 21:33:58,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:58,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1753 transitions. [2022-07-19 21:33:58,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.43333333333333) internal successors, (1753), 30 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:58,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:58,065 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:58,065 INFO L186 Difference]: Start difference. First operand has 164 places, 208 transitions, 1906 flow. Second operand 30 states and 1753 transitions. [2022-07-19 21:33:58,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 399 transitions, 4299 flow [2022-07-19 21:33:58,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 399 transitions, 4204 flow, removed 45 selfloop flow, removed 2 redundant places. [2022-07-19 21:33:58,111 INFO L242 Difference]: Finished difference. Result has 205 places, 301 transitions, 3478 flow [2022-07-19 21:33:58,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3478, PETRI_PLACES=205, PETRI_TRANSITIONS=301} [2022-07-19 21:33:58,112 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 137 predicate places. [2022-07-19 21:33:58,112 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 301 transitions, 3478 flow [2022-07-19 21:33:58,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:58,112 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:58,113 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:58,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 21:33:58,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:58,327 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash 38557705, now seen corresponding path program 5 times [2022-07-19 21:33:58,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:58,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55117013] [2022-07-19 21:33:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:58,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:58,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:58,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55117013] [2022-07-19 21:33:58,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55117013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:58,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099833344] [2022-07-19 21:33:58,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:33:58,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:58,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:58,395 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:58,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:33:58,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 21:33:58,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:58,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:33:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:58,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:58,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099833344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:58,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:58,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-19 21:33:58,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273772942] [2022-07-19 21:33:58,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:58,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 21:33:58,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 21:33:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:33:58,603 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:33:58,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 301 transitions, 3478 flow. Second operand has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:58,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:58,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:33:58,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:59,814 INFO L129 PetriNetUnfolder]: 1071/3017 cut-off events. [2022-07-19 21:33:59,815 INFO L130 PetriNetUnfolder]: For 25405/25405 co-relation queries the response was YES. [2022-07-19 21:33:59,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15872 conditions, 3017 events. 1071/3017 cut-off events. For 25405/25405 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25420 event pairs, 75 based on Foata normal form. 3/3014 useless extension candidates. Maximal degree in co-relation 15819. Up to 314 conditions per place. [2022-07-19 21:33:59,856 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 210 selfloop transitions, 255 changer transitions 10/517 dead transitions. [2022-07-19 21:33:59,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 517 transitions, 6632 flow [2022-07-19 21:33:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-19 21:33:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-19 21:33:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2713 transitions. [2022-07-19 21:33:59,862 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7496546007184305 [2022-07-19 21:33:59,862 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2713 transitions. [2022-07-19 21:33:59,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2713 transitions. [2022-07-19 21:33:59,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:59,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2713 transitions. [2022-07-19 21:33:59,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.723404255319146) internal successors, (2713), 47 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:59,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:59,873 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:59,873 INFO L186 Difference]: Start difference. First operand has 205 places, 301 transitions, 3478 flow. Second operand 47 states and 2713 transitions. [2022-07-19 21:33:59,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 517 transitions, 6632 flow [2022-07-19 21:34:00,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 517 transitions, 6404 flow, removed 37 selfloop flow, removed 9 redundant places. [2022-07-19 21:34:00,031 INFO L242 Difference]: Finished difference. Result has 254 places, 390 transitions, 5130 flow [2022-07-19 21:34:00,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=5130, PETRI_PLACES=254, PETRI_TRANSITIONS=390} [2022-07-19 21:34:00,032 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 186 predicate places. [2022-07-19 21:34:00,032 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 390 transitions, 5130 flow [2022-07-19 21:34:00,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:00,033 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:00,033 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:00,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:00,247 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,SelfDestructingSolverStorable12 [2022-07-19 21:34:00,248 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:00,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:00,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1627335489, now seen corresponding path program 6 times [2022-07-19 21:34:00,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:00,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666640206] [2022-07-19 21:34:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:00,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:00,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:00,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666640206] [2022-07-19 21:34:00,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666640206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:00,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858647353] [2022-07-19 21:34:00,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:34:00,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:00,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:00,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:00,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:34:00,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:34:00,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:00,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:34:00,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:00,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:00,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858647353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:00,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:00,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:34:00,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065477435] [2022-07-19 21:34:00,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:00,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:34:00,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:00,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:34:00,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:34:00,572 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:34:00,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 390 transitions, 5130 flow. Second operand has 18 states, 18 states have (on average 56.166666666666664) internal successors, (1011), 18 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:00,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:00,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:34:00,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:02,109 INFO L129 PetriNetUnfolder]: 1271/3648 cut-off events. [2022-07-19 21:34:02,109 INFO L130 PetriNetUnfolder]: For 49999/49999 co-relation queries the response was YES. [2022-07-19 21:34:02,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22008 conditions, 3648 events. 1271/3648 cut-off events. For 49999/49999 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32683 event pairs, 100 based on Foata normal form. 19/3656 useless extension candidates. Maximal degree in co-relation 21944. Up to 573 conditions per place. [2022-07-19 21:34:02,221 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 185 selfloop transitions, 333 changer transitions 4/564 dead transitions. [2022-07-19 21:34:02,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 564 transitions, 8240 flow [2022-07-19 21:34:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 21:34:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-19 21:34:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2368 transitions. [2022-07-19 21:34:02,226 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7500791891035794 [2022-07-19 21:34:02,226 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2368 transitions. [2022-07-19 21:34:02,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2368 transitions. [2022-07-19 21:34:02,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:02,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2368 transitions. [2022-07-19 21:34:02,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.75609756097561) internal successors, (2368), 41 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:02,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:02,236 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:02,236 INFO L186 Difference]: Start difference. First operand has 254 places, 390 transitions, 5130 flow. Second operand 41 states and 2368 transitions. [2022-07-19 21:34:02,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 564 transitions, 8240 flow [2022-07-19 21:34:02,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 564 transitions, 7698 flow, removed 227 selfloop flow, removed 2 redundant places. [2022-07-19 21:34:02,526 INFO L242 Difference]: Finished difference. Result has 300 places, 456 transitions, 6627 flow [2022-07-19 21:34:02,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6627, PETRI_PLACES=300, PETRI_TRANSITIONS=456} [2022-07-19 21:34:02,527 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 232 predicate places. [2022-07-19 21:34:02,527 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 456 transitions, 6627 flow [2022-07-19 21:34:02,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.166666666666664) internal successors, (1011), 18 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:02,527 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:02,527 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:02,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:02,740 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,SelfDestructingSolverStorable13 [2022-07-19 21:34:02,740 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:02,741 INFO L85 PathProgramCache]: Analyzing trace with hash -584043037, now seen corresponding path program 7 times [2022-07-19 21:34:02,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:02,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80744675] [2022-07-19 21:34:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:02,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:02,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:02,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80744675] [2022-07-19 21:34:02,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80744675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:02,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805580336] [2022-07-19 21:34:02,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:34:02,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:02,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:02,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:02,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:34:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:34:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:02,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:03,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805580336] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:03,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:03,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-19 21:34:03,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488087575] [2022-07-19 21:34:03,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:03,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 21:34:03,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:03,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 21:34:03,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:34:03,021 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:34:03,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 456 transitions, 6627 flow. Second operand has 17 states, 17 states have (on average 55.8235294117647) internal successors, (949), 17 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:03,021 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:03,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:34:03,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:04,827 INFO L129 PetriNetUnfolder]: 1311/3738 cut-off events. [2022-07-19 21:34:04,828 INFO L130 PetriNetUnfolder]: For 57926/57926 co-relation queries the response was YES. [2022-07-19 21:34:04,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23500 conditions, 3738 events. 1311/3738 cut-off events. For 57926/57926 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 33721 event pairs, 95 based on Foata normal form. 27/3748 useless extension candidates. Maximal degree in co-relation 23428. Up to 471 conditions per place. [2022-07-19 21:34:04,874 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 238 selfloop transitions, 361 changer transitions 24/665 dead transitions. [2022-07-19 21:34:04,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 665 transitions, 10102 flow [2022-07-19 21:34:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-19 21:34:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-19 21:34:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3914 transitions. [2022-07-19 21:34:04,880 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7475171886936592 [2022-07-19 21:34:04,880 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3914 transitions. [2022-07-19 21:34:04,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3914 transitions. [2022-07-19 21:34:04,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:04,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3914 transitions. [2022-07-19 21:34:04,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 57.55882352941177) internal successors, (3914), 68 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:04,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:04,896 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:04,896 INFO L186 Difference]: Start difference. First operand has 300 places, 456 transitions, 6627 flow. Second operand 68 states and 3914 transitions. [2022-07-19 21:34:04,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 665 transitions, 10102 flow [2022-07-19 21:34:05,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 665 transitions, 9623 flow, removed 100 selfloop flow, removed 23 redundant places. [2022-07-19 21:34:05,230 INFO L242 Difference]: Finished difference. Result has 352 places, 491 transitions, 7737 flow [2022-07-19 21:34:05,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=7737, PETRI_PLACES=352, PETRI_TRANSITIONS=491} [2022-07-19 21:34:05,231 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 284 predicate places. [2022-07-19 21:34:05,231 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 491 transitions, 7737 flow [2022-07-19 21:34:05,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.8235294117647) internal successors, (949), 17 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:05,232 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:05,232 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:05,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:05,439 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,SelfDestructingSolverStorable14 [2022-07-19 21:34:05,439 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:05,439 INFO L85 PathProgramCache]: Analyzing trace with hash -483096289, now seen corresponding path program 8 times [2022-07-19 21:34:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:05,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466322922] [2022-07-19 21:34:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:05,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:05,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466322922] [2022-07-19 21:34:05,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466322922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:05,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263424675] [2022-07-19 21:34:05,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:34:05,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:05,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:05,528 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:05,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:34:05,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:34:05,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:05,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:34:05,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:05,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:34:05,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263424675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:05,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:05,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-07-19 21:34:05,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136321993] [2022-07-19 21:34:05,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:05,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:34:05,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:05,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:34:05,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:34:05,734 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:34:05,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 491 transitions, 7737 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:05,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:05,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:34:05,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:07,866 INFO L129 PetriNetUnfolder]: 2281/6793 cut-off events. [2022-07-19 21:34:07,866 INFO L130 PetriNetUnfolder]: For 113952/113952 co-relation queries the response was YES. [2022-07-19 21:34:07,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43102 conditions, 6793 events. 2281/6793 cut-off events. For 113952/113952 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 68200 event pairs, 353 based on Foata normal form. 6/6734 useless extension candidates. Maximal degree in co-relation 43024. Up to 1557 conditions per place. [2022-07-19 21:34:07,952 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 525 selfloop transitions, 343 changer transitions 12/922 dead transitions. [2022-07-19 21:34:07,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 922 transitions, 15651 flow [2022-07-19 21:34:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-19 21:34:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-07-19 21:34:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3315 transitions. [2022-07-19 21:34:07,957 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7552973342447027 [2022-07-19 21:34:07,957 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3315 transitions. [2022-07-19 21:34:07,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3315 transitions. [2022-07-19 21:34:07,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:07,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3315 transitions. [2022-07-19 21:34:07,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 58.1578947368421) internal successors, (3315), 57 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:07,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 77.0) internal successors, (4466), 58 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:07,967 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 77.0) internal successors, (4466), 58 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:07,967 INFO L186 Difference]: Start difference. First operand has 352 places, 491 transitions, 7737 flow. Second operand 57 states and 3315 transitions. [2022-07-19 21:34:07,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 922 transitions, 15651 flow [2022-07-19 21:34:08,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 922 transitions, 15073 flow, removed 98 selfloop flow, removed 33 redundant places. [2022-07-19 21:34:08,659 INFO L242 Difference]: Finished difference. Result has 406 places, 728 transitions, 12514 flow [2022-07-19 21:34:08,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=7336, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=12514, PETRI_PLACES=406, PETRI_TRANSITIONS=728} [2022-07-19 21:34:08,660 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 338 predicate places. [2022-07-19 21:34:08,660 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 728 transitions, 12514 flow [2022-07-19 21:34:08,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:08,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:08,661 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:08,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:08,873 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,SelfDestructingSolverStorable15 [2022-07-19 21:34:08,874 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:08,874 INFO L85 PathProgramCache]: Analyzing trace with hash 571912985, now seen corresponding path program 9 times [2022-07-19 21:34:08,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:08,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985044187] [2022-07-19 21:34:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:08,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:08,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985044187] [2022-07-19 21:34:08,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985044187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119150785] [2022-07-19 21:34:08,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:34:08,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:08,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:08,950 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:08,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:34:09,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 21:34:09,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:09,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:34:09,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:09,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:09,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119150785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:09,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:09,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-19 21:34:09,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900918701] [2022-07-19 21:34:09,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:09,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:34:09,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:09,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:34:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:34:09,150 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:34:09,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 728 transitions, 12514 flow. Second operand has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:09,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:09,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:34:09,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:11,116 INFO L129 PetriNetUnfolder]: 2300/6854 cut-off events. [2022-07-19 21:34:11,117 INFO L130 PetriNetUnfolder]: For 156979/156979 co-relation queries the response was YES. [2022-07-19 21:34:11,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48422 conditions, 6854 events. 2300/6854 cut-off events. For 156979/156979 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 68900 event pairs, 656 based on Foata normal form. 1/6755 useless extension candidates. Maximal degree in co-relation 48313. Up to 2132 conditions per place. [2022-07-19 21:34:11,228 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 485 selfloop transitions, 256 changer transitions 8/791 dead transitions. [2022-07-19 21:34:11,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 791 transitions, 14955 flow [2022-07-19 21:34:11,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:34:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:34:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1386 transitions. [2022-07-19 21:34:11,231 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-07-19 21:34:11,231 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1386 transitions. [2022-07-19 21:34:11,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1386 transitions. [2022-07-19 21:34:11,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:11,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1386 transitions. [2022-07-19 21:34:11,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.75) internal successors, (1386), 24 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:11,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:11,236 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:11,236 INFO L186 Difference]: Start difference. First operand has 406 places, 728 transitions, 12514 flow. Second operand 24 states and 1386 transitions. [2022-07-19 21:34:11,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 791 transitions, 14955 flow [2022-07-19 21:34:12,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 791 transitions, 14460 flow, removed 203 selfloop flow, removed 6 redundant places. [2022-07-19 21:34:12,432 INFO L242 Difference]: Finished difference. Result has 432 places, 746 transitions, 12872 flow [2022-07-19 21:34:12,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12040, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12872, PETRI_PLACES=432, PETRI_TRANSITIONS=746} [2022-07-19 21:34:12,433 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 364 predicate places. [2022-07-19 21:34:12,433 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 746 transitions, 12872 flow [2022-07-19 21:34:12,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:12,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:12,434 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:12,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 21:34:12,640 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,SelfDestructingSolverStorable16 [2022-07-19 21:34:12,640 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:12,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1469113975, now seen corresponding path program 10 times [2022-07-19 21:34:12,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236231415] [2022-07-19 21:34:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:12,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:12,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:12,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236231415] [2022-07-19 21:34:12,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236231415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:12,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127281282] [2022-07-19 21:34:12,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:34:12,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:12,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:12,721 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:12,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:34:12,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:34:12,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:12,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:34:12,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:12,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:12,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127281282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:12,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:12,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:34:12,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631049272] [2022-07-19 21:34:12,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:12,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:34:12,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:34:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:34:12,963 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:34:12,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 746 transitions, 12872 flow. Second operand has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:12,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:12,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:34:12,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:18,035 INFO L129 PetriNetUnfolder]: 4589/12732 cut-off events. [2022-07-19 21:34:18,036 INFO L130 PetriNetUnfolder]: For 315191/315191 co-relation queries the response was YES. [2022-07-19 21:34:18,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92593 conditions, 12732 events. 4589/12732 cut-off events. For 315191/315191 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 139450 event pairs, 605 based on Foata normal form. 68/12686 useless extension candidates. Maximal degree in co-relation 92475. Up to 2088 conditions per place. [2022-07-19 21:34:18,197 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 588 selfloop transitions, 1197 changer transitions 38/1865 dead transitions. [2022-07-19 21:34:18,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1865 transitions, 36408 flow [2022-07-19 21:34:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-19 21:34:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-07-19 21:34:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4916 transitions. [2022-07-19 21:34:18,202 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7423739051646029 [2022-07-19 21:34:18,202 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4916 transitions. [2022-07-19 21:34:18,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4916 transitions. [2022-07-19 21:34:18,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:18,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4916 transitions. [2022-07-19 21:34:18,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 57.16279069767442) internal successors, (4916), 86 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:18,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:18,218 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:18,218 INFO L186 Difference]: Start difference. First operand has 432 places, 746 transitions, 12872 flow. Second operand 86 states and 4916 transitions. [2022-07-19 21:34:18,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 1865 transitions, 36408 flow [2022-07-19 21:34:20,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1865 transitions, 35637 flow, removed 66 selfloop flow, removed 6 redundant places. [2022-07-19 21:34:20,610 INFO L242 Difference]: Finished difference. Result has 535 places, 1518 transitions, 31372 flow [2022-07-19 21:34:20,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12563, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=31372, PETRI_PLACES=535, PETRI_TRANSITIONS=1518} [2022-07-19 21:34:20,611 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 467 predicate places. [2022-07-19 21:34:20,611 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1518 transitions, 31372 flow [2022-07-19 21:34:20,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:20,612 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:20,612 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:20,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-19 21:34:20,812 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,SelfDestructingSolverStorable17 [2022-07-19 21:34:20,812 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:20,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:20,813 INFO L85 PathProgramCache]: Analyzing trace with hash 798999983, now seen corresponding path program 11 times [2022-07-19 21:34:20,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:20,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732309997] [2022-07-19 21:34:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:20,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:20,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:20,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732309997] [2022-07-19 21:34:20,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732309997] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:20,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246287590] [2022-07-19 21:34:20,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:34:20,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:20,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:20,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:20,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:34:20,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 21:34:20,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:20,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:34:20,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:21,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:21,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246287590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:21,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:21,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:34:21,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247022263] [2022-07-19 21:34:21,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:21,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:34:21,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:21,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:34:21,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:34:21,064 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:34:21,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1518 transitions, 31372 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:21,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:21,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:34:21,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:29,370 INFO L129 PetriNetUnfolder]: 6229/17182 cut-off events. [2022-07-19 21:34:29,370 INFO L130 PetriNetUnfolder]: For 600922/600922 co-relation queries the response was YES. [2022-07-19 21:34:29,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144730 conditions, 17182 events. 6229/17182 cut-off events. For 600922/600922 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 198013 event pairs, 856 based on Foata normal form. 7/17025 useless extension candidates. Maximal degree in co-relation 144588. Up to 3275 conditions per place. [2022-07-19 21:34:29,633 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 880 selfloop transitions, 1252 changer transitions 7/2181 dead transitions. [2022-07-19 21:34:29,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 2181 transitions, 49810 flow [2022-07-19 21:34:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 21:34:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-19 21:34:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3003 transitions. [2022-07-19 21:34:29,636 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-07-19 21:34:29,636 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3003 transitions. [2022-07-19 21:34:29,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3003 transitions. [2022-07-19 21:34:29,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:29,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3003 transitions. [2022-07-19 21:34:29,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.75) internal successors, (3003), 52 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:29,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 77.0) internal successors, (4081), 53 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:29,645 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 77.0) internal successors, (4081), 53 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:29,645 INFO L186 Difference]: Start difference. First operand has 535 places, 1518 transitions, 31372 flow. Second operand 52 states and 3003 transitions. [2022-07-19 21:34:29,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 2181 transitions, 49810 flow [2022-07-19 21:34:35,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 2181 transitions, 49000 flow, removed 309 selfloop flow, removed 26 redundant places. [2022-07-19 21:34:35,874 INFO L242 Difference]: Finished difference. Result has 576 places, 1948 transitions, 45824 flow [2022-07-19 21:34:35,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=30741, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=845, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=45824, PETRI_PLACES=576, PETRI_TRANSITIONS=1948} [2022-07-19 21:34:35,875 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 508 predicate places. [2022-07-19 21:34:35,875 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1948 transitions, 45824 flow [2022-07-19 21:34:35,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:35,876 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:35,876 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:35,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:36,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:36,076 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:36,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1520202161, now seen corresponding path program 12 times [2022-07-19 21:34:36,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:36,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55507501] [2022-07-19 21:34:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:36,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:36,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:36,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55507501] [2022-07-19 21:34:36,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55507501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:36,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482001754] [2022-07-19 21:34:36,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:34:36,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:36,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:36,135 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:36,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:34:36,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 21:34:36,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:34:36,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:36,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:36,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482001754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:36,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:36,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:34:36,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441646654] [2022-07-19 21:34:36,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:36,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:34:36,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:36,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:34:36,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:34:36,324 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:34:36,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1948 transitions, 45824 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:36,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:36,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:34:36,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:47,104 INFO L129 PetriNetUnfolder]: 6300/17709 cut-off events. [2022-07-19 21:34:47,105 INFO L130 PetriNetUnfolder]: For 761741/761741 co-relation queries the response was YES. [2022-07-19 21:34:47,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158591 conditions, 17709 events. 6300/17709 cut-off events. For 761741/761741 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 207546 event pairs, 998 based on Foata normal form. 7/17514 useless extension candidates. Maximal degree in co-relation 158436. Up to 2403 conditions per place. [2022-07-19 21:34:47,401 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 734 selfloop transitions, 1465 changer transitions 18/2259 dead transitions. [2022-07-19 21:34:47,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 2259 transitions, 56612 flow [2022-07-19 21:34:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-19 21:34:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-19 21:34:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4016 transitions. [2022-07-19 21:34:47,405 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7450834879406308 [2022-07-19 21:34:47,405 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4016 transitions. [2022-07-19 21:34:47,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4016 transitions. [2022-07-19 21:34:47,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:47,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4016 transitions. [2022-07-19 21:34:47,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.371428571428574) internal successors, (4016), 70 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:47,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:47,417 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:47,417 INFO L186 Difference]: Start difference. First operand has 576 places, 1948 transitions, 45824 flow. Second operand 70 states and 4016 transitions. [2022-07-19 21:34:47,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 2259 transitions, 56612 flow [2022-07-19 21:34:55,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 2259 transitions, 55282 flow, removed 268 selfloop flow, removed 29 redundant places. [2022-07-19 21:34:55,862 INFO L242 Difference]: Finished difference. Result has 622 places, 2060 transitions, 51355 flow [2022-07-19 21:34:55,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=44573, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=51355, PETRI_PLACES=622, PETRI_TRANSITIONS=2060} [2022-07-19 21:34:55,865 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 554 predicate places. [2022-07-19 21:34:55,865 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 2060 transitions, 51355 flow [2022-07-19 21:34:55,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:55,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:55,865 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:55,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:56,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:56,079 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:56,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:56,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2008611189, now seen corresponding path program 13 times [2022-07-19 21:34:56,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:56,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884541211] [2022-07-19 21:34:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:56,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:56,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:56,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884541211] [2022-07-19 21:34:56,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884541211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:56,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289463509] [2022-07-19 21:34:56,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:34:56,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:56,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:56,147 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:56,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 21:34:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:56,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:34:56,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:56,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:56,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289463509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:56,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:56,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:34:56,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482891221] [2022-07-19 21:34:56,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:56,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:34:56,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:34:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:34:56,334 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:34:56,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 2060 transitions, 51355 flow. Second operand has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:56,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:56,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:34:56,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:35:07,442 INFO L129 PetriNetUnfolder]: 6334/17500 cut-off events. [2022-07-19 21:35:07,443 INFO L130 PetriNetUnfolder]: For 820978/820978 co-relation queries the response was YES. [2022-07-19 21:35:07,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165044 conditions, 17500 events. 6334/17500 cut-off events. For 820978/820978 co-relation queries the response was YES. Maximal size of possible extension queue 1219. Compared 203258 event pairs, 799 based on Foata normal form. 45/17355 useless extension candidates. Maximal degree in co-relation 164882. Up to 3742 conditions per place. [2022-07-19 21:35:07,744 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 737 selfloop transitions, 1552 changer transitions 45/2376 dead transitions. [2022-07-19 21:35:07,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 2376 transitions, 62124 flow [2022-07-19 21:35:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-19 21:35:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-19 21:35:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3929 transitions. [2022-07-19 21:35:07,747 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7395068699416526 [2022-07-19 21:35:07,748 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3929 transitions. [2022-07-19 21:35:07,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3929 transitions. [2022-07-19 21:35:07,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:35:07,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3929 transitions. [2022-07-19 21:35:07,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 56.94202898550725) internal successors, (3929), 69 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:07,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:07,759 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:07,759 INFO L186 Difference]: Start difference. First operand has 622 places, 2060 transitions, 51355 flow. Second operand 69 states and 3929 transitions. [2022-07-19 21:35:07,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 2376 transitions, 62124 flow [2022-07-19 21:35:16,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 2376 transitions, 60226 flow, removed 214 selfloop flow, removed 49 redundant places. [2022-07-19 21:35:16,436 INFO L242 Difference]: Finished difference. Result has 644 places, 2127 transitions, 55652 flow [2022-07-19 21:35:16,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=49404, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=55652, PETRI_PLACES=644, PETRI_TRANSITIONS=2127} [2022-07-19 21:35:16,438 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 576 predicate places. [2022-07-19 21:35:16,438 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 2127 transitions, 55652 flow [2022-07-19 21:35:16,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:16,439 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:35:16,439 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:35:16,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 21:35:16,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:16,663 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:35:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:35:16,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1858528645, now seen corresponding path program 14 times [2022-07-19 21:35:16,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:35:16,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673792229] [2022-07-19 21:35:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:35:16,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:35:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:35:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:16,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:35:16,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673792229] [2022-07-19 21:35:16,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673792229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:35:16,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946750468] [2022-07-19 21:35:16,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:35:16,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:16,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:35:16,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:35:16,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 21:35:16,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:35:16,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:35:16,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:35:16,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:35:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:16,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:35:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:16,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946750468] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:35:16,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:35:16,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-07-19 21:35:16,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496250069] [2022-07-19 21:35:16,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:35:16,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:35:16,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:35:16,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:35:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:35:16,931 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:35:16,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 2127 transitions, 55652 flow. Second operand has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:16,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:35:16,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:35:16,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:35:30,083 INFO L129 PetriNetUnfolder]: 7232/20348 cut-off events. [2022-07-19 21:35:30,083 INFO L130 PetriNetUnfolder]: For 1038351/1038351 co-relation queries the response was YES. [2022-07-19 21:35:30,345 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194534 conditions, 20348 events. 7232/20348 cut-off events. For 1038351/1038351 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 243197 event pairs, 649 based on Foata normal form. 34/20318 useless extension candidates. Maximal degree in co-relation 194369. Up to 4348 conditions per place. [2022-07-19 21:35:30,597 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1208 selfloop transitions, 1379 changer transitions 40/2669 dead transitions. [2022-07-19 21:35:30,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 2669 transitions, 72871 flow [2022-07-19 21:35:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-19 21:35:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-07-19 21:35:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3864 transitions. [2022-07-19 21:35:30,600 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7489823609226595 [2022-07-19 21:35:30,600 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3864 transitions. [2022-07-19 21:35:30,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3864 transitions. [2022-07-19 21:35:30,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:35:30,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3864 transitions. [2022-07-19 21:35:30,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 57.67164179104478) internal successors, (3864), 67 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:30,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 77.0) internal successors, (5236), 68 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:30,609 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 77.0) internal successors, (5236), 68 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:30,609 INFO L186 Difference]: Start difference. First operand has 644 places, 2127 transitions, 55652 flow. Second operand 67 states and 3864 transitions. [2022-07-19 21:35:30,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 2669 transitions, 72871 flow [2022-07-19 21:35:41,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 2669 transitions, 70678 flow, removed 140 selfloop flow, removed 54 redundant places. [2022-07-19 21:35:41,724 INFO L242 Difference]: Finished difference. Result has 684 places, 2416 transitions, 66057 flow [2022-07-19 21:35:41,725 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=53782, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=66057, PETRI_PLACES=684, PETRI_TRANSITIONS=2416} [2022-07-19 21:35:41,726 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 616 predicate places. [2022-07-19 21:35:41,726 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 2416 transitions, 66057 flow [2022-07-19 21:35:41,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:41,726 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:35:41,726 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:35:41,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 21:35:41,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:41,927 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:35:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:35:41,927 INFO L85 PathProgramCache]: Analyzing trace with hash 978828719, now seen corresponding path program 15 times [2022-07-19 21:35:41,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:35:41,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055167517] [2022-07-19 21:35:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:35:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:35:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:35:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:41,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:35:41,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055167517] [2022-07-19 21:35:41,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055167517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:35:41,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018440166] [2022-07-19 21:35:41,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:35:41,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:41,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:35:41,997 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:35:41,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 21:35:42,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 21:35:42,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:35:42,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:35:42,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:35:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:42,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:35:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:42,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018440166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:35:42,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:35:42,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-07-19 21:35:42,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479549416] [2022-07-19 21:35:42,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:35:42,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:35:42,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:35:42,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:35:42,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:35:42,196 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-19 21:35:42,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 2416 transitions, 66057 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:42,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:35:42,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-19 21:35:42,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand