./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/floating_read-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-deagle/floating_read-5.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f28efd84e1dbcbcea7683bca483f8f3b9fbdd333eb36f517b9f12d5bccb885d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:26:36,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:26:36,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:26:36,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:26:36,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:26:36,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:26:36,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:26:36,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:26:36,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:26:36,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:26:36,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:26:36,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:26:36,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:26:36,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:26:36,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:26:36,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:26:36,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:26:36,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:26:36,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:26:36,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:26:36,821 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:26:36,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:26:36,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:26:36,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:26:36,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:26:36,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:26:36,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:26:36,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:26:36,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:26:36,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:26:36,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:26:36,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:26:36,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:26:36,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:26:36,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:26:36,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:26:36,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:26:36,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:26:36,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:26:36,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:26:36,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:26:36,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:26:36,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:26:36,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:26:36,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:26:36,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:26:36,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:26:36,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:26:36,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:26:36,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:26:36,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:26:36,881 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:26:36,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:26:36,882 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:26:36,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:26:36,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:26:36,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:26:36,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:26:36,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:26:36,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:26:36,883 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:26:36,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:26:36,884 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:26:36,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:26:36,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:26:36,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:26:36,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:26:36,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:26:36,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:26:36,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:26:36,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:26:36,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:26:36,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:26:36,895 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:26:36,895 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:26:36,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:26:36,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f28efd84e1dbcbcea7683bca483f8f3b9fbdd333eb36f517b9f12d5bccb885d [2022-07-13 22:26:37,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:26:37,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:26:37,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:26:37,179 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:26:37,179 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:26:37,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/floating_read-5.i [2022-07-13 22:26:37,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d40a1e10/e3d38f53c1674aceb85cd600dde4db1a/FLAG471fc57d9 [2022-07-13 22:26:37,687 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:26:37,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-5.i [2022-07-13 22:26:37,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d40a1e10/e3d38f53c1674aceb85cd600dde4db1a/FLAG471fc57d9 [2022-07-13 22:26:38,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d40a1e10/e3d38f53c1674aceb85cd600dde4db1a [2022-07-13 22:26:38,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:26:38,036 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:26:38,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:26:38,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:26:38,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:26:38,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6b62c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38, skipping insertion in model container [2022-07-13 22:26:38,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:26:38,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:26:38,368 WARN L1550 CHandler]: Possible shadowing of function thread [2022-07-13 22:26:38,378 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/pthread-deagle/floating_read-5.i[31193,31206] [2022-07-13 22:26:38,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:26:38,391 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:26:38,432 WARN L1550 CHandler]: Possible shadowing of function thread [2022-07-13 22:26:38,436 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/pthread-deagle/floating_read-5.i[31193,31206] [2022-07-13 22:26:38,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:26:38,480 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:26:38,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38 WrapperNode [2022-07-13 22:26:38,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:26:38,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:26:38,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:26:38,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:26:38,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,522 INFO L137 Inliner]: procedures = 162, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-07-13 22:26:38,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:26:38,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:26:38,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:26:38,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:26:38,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:26:38,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:26:38,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:26:38,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:26:38,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (1/1) ... [2022-07-13 22:26:38,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:26:38,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:38,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:26:38,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:26:38,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:26:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:26:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:26:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:26:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:26:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:26:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:26:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-07-13 22:26:38,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-07-13 22:26:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:26:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:26:38,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:26:38,669 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:26:38,789 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:26:38,803 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:26:38,930 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:26:38,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:26:38,935 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 22:26:38,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:26:38 BoogieIcfgContainer [2022-07-13 22:26:38,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:26:38,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:26:38,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:26:38,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:26:38,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:26:38" (1/3) ... [2022-07-13 22:26:38,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4a9eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:26:38, skipping insertion in model container [2022-07-13 22:26:38,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:38" (2/3) ... [2022-07-13 22:26:38,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4a9eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:26:38, skipping insertion in model container [2022-07-13 22:26:38,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:26:38" (3/3) ... [2022-07-13 22:26:38,944 INFO L111 eAbstractionObserver]: Analyzing ICFG floating_read-5.i [2022-07-13 22:26:38,952 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:26:38,960 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:26:38,960 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:26:38,960 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:26:39,001 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 22:26:39,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2022-07-13 22:26:39,068 INFO L129 PetriNetUnfolder]: 7/81 cut-off events. [2022-07-13 22:26:39,069 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 22:26:39,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 81 events. 7/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2022-07-13 22:26:39,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 126 flow [2022-07-13 22:26:39,076 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2022-07-13 22:26:39,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:26:39,105 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@4256bd6b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78b6d79 [2022-07-13 22:26:39,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 22:26:39,133 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-13 22:26:39,133 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 22:26:39,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:39,134 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:39,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:39,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1781753840, now seen corresponding path program 1 times [2022-07-13 22:26:39,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:39,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54999752] [2022-07-13 22:26:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:39,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:39,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:39,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54999752] [2022-07-13 22:26:39,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54999752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:39,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:39,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:26:39,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613257682] [2022-07-13 22:26:39,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:39,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:26:39,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:39,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:26:39,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:26:39,339 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 59 [2022-07-13 22:26:39,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 85 flow. Second operand has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:39,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 59 [2022-07-13 22:26:39,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:39,367 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2022-07-13 22:26:39,368 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 22:26:39,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 46 events. 0/46 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-07-13 22:26:39,369 INFO L132 encePairwiseOnDemand]: 58/59 looper letters, 1 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2022-07-13 22:26:39,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 85 flow [2022-07-13 22:26:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:26:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:26:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2022-07-13 22:26:39,380 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152542372881356 [2022-07-13 22:26:39,380 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 108 transitions. [2022-07-13 22:26:39,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 108 transitions. [2022-07-13 22:26:39,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:39,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 108 transitions. [2022-07-13 22:26:39,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,391 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,392 INFO L186 Difference]: Start difference. First operand has 42 places, 40 transitions, 85 flow. Second operand 2 states and 108 transitions. [2022-07-13 22:26:39,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 85 flow [2022-07-13 22:26:39,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:26:39,397 INFO L242 Difference]: Finished difference. Result has 43 places, 39 transitions, 83 flow [2022-07-13 22:26:39,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=83, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2022-07-13 22:26:39,401 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2022-07-13 22:26:39,403 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 83 flow [2022-07-13 22:26:39,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,404 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:39,404 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:39,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:26:39,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:39,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1781754801, now seen corresponding path program 1 times [2022-07-13 22:26:39,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:39,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524033145] [2022-07-13 22:26:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:39,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:39,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:39,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524033145] [2022-07-13 22:26:39,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524033145] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:39,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:39,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:26:39,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341022318] [2022-07-13 22:26:39,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:39,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:26:39,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:39,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:26:39,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:26:39,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 59 [2022-07-13 22:26:39,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:39,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 59 [2022-07-13 22:26:39,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:39,494 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2022-07-13 22:26:39,494 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 22:26:39,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 0/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-13 22:26:39,495 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 8 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-07-13 22:26:39,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 107 flow [2022-07-13 22:26:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:26:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:26:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2022-07-13 22:26:39,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8418079096045198 [2022-07-13 22:26:39,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2022-07-13 22:26:39,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2022-07-13 22:26:39,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:39,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2022-07-13 22:26:39,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,501 INFO L186 Difference]: Start difference. First operand has 43 places, 39 transitions, 83 flow. Second operand 3 states and 149 transitions. [2022-07-13 22:26:39,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 107 flow [2022-07-13 22:26:39,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:26:39,503 INFO L242 Difference]: Finished difference. Result has 46 places, 39 transitions, 91 flow [2022-07-13 22:26:39,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2022-07-13 22:26:39,504 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-07-13 22:26:39,505 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 91 flow [2022-07-13 22:26:39,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,505 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:39,505 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:39,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:26:39,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:39,507 INFO L85 PathProgramCache]: Analyzing trace with hash -315270955, now seen corresponding path program 1 times [2022-07-13 22:26:39,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:39,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763326236] [2022-07-13 22:26:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:39,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:26:39,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:39,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763326236] [2022-07-13 22:26:39,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763326236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:39,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:39,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:26:39,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844864633] [2022-07-13 22:26:39,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:39,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:26:39,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:39,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:26:39,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:26:39,607 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 59 [2022-07-13 22:26:39,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:39,608 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 59 [2022-07-13 22:26:39,608 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:39,622 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2022-07-13 22:26:39,622 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:26:39,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 43 events. 0/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-07-13 22:26:39,623 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 3 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-07-13 22:26:39,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 101 flow [2022-07-13 22:26:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:26:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:26:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2022-07-13 22:26:39,625 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.847457627118644 [2022-07-13 22:26:39,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2022-07-13 22:26:39,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2022-07-13 22:26:39,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:39,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2022-07-13 22:26:39,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,629 INFO L186 Difference]: Start difference. First operand has 46 places, 39 transitions, 91 flow. Second operand 3 states and 150 transitions. [2022-07-13 22:26:39,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 101 flow [2022-07-13 22:26:39,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 97 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:26:39,631 INFO L242 Difference]: Finished difference. Result has 47 places, 39 transitions, 95 flow [2022-07-13 22:26:39,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2022-07-13 22:26:39,632 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-07-13 22:26:39,632 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 95 flow [2022-07-13 22:26:39,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,633 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:39,633 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:39,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:26:39,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:39,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1968634815, now seen corresponding path program 1 times [2022-07-13 22:26:39,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:39,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311576625] [2022-07-13 22:26:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:39,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:26:39,677 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 22:26:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:26:39,724 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 22:26:39,725 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 22:26:39,725 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 22:26:39,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 22:26:39,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:26:39,727 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 22:26:39,732 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 22:26:39,733 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 22:26:39,744 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:26:39,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 150 flow [2022-07-13 22:26:39,763 INFO L129 PetriNetUnfolder]: 13/135 cut-off events. [2022-07-13 22:26:39,764 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 22:26:39,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 135 events. 13/135 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 233 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-07-13 22:26:39,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 150 flow [2022-07-13 22:26:39,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 46 transitions, 104 flow [2022-07-13 22:26:39,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:26:39,768 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@4256bd6b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78b6d79 [2022-07-13 22:26:39,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 22:26:39,772 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-07-13 22:26:39,772 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 22:26:39,772 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:39,772 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:39,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:39,773 INFO L85 PathProgramCache]: Analyzing trace with hash 775345522, now seen corresponding path program 1 times [2022-07-13 22:26:39,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:39,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647784439] [2022-07-13 22:26:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:39,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:39,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:39,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647784439] [2022-07-13 22:26:39,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647784439] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:39,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:39,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:26:39,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670957390] [2022-07-13 22:26:39,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:26:39,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:39,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:26:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:26:39,798 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 66 [2022-07-13 22:26:39,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 58.5) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:39,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 66 [2022-07-13 22:26:39,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:39,811 INFO L129 PetriNetUnfolder]: 0/64 cut-off events. [2022-07-13 22:26:39,811 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-13 22:26:39,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 64 events. 0/64 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 3/64 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-07-13 22:26:39,812 INFO L132 encePairwiseOnDemand]: 65/66 looper letters, 2 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2022-07-13 22:26:39,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 106 flow [2022-07-13 22:26:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:26:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:26:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 119 transitions. [2022-07-13 22:26:39,814 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9015151515151515 [2022-07-13 22:26:39,814 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 119 transitions. [2022-07-13 22:26:39,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 119 transitions. [2022-07-13 22:26:39,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:39,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 119 transitions. [2022-07-13 22:26:39,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,816 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,816 INFO L186 Difference]: Start difference. First operand has 50 places, 46 transitions, 104 flow. Second operand 2 states and 119 transitions. [2022-07-13 22:26:39,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 106 flow [2022-07-13 22:26:39,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 104 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-13 22:26:39,818 INFO L242 Difference]: Finished difference. Result has 51 places, 45 transitions, 100 flow [2022-07-13 22:26:39,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=100, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2022-07-13 22:26:39,819 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2022-07-13 22:26:39,819 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 100 flow [2022-07-13 22:26:39,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 58.5) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,820 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:39,820 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:39,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:26:39,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:39,821 INFO L85 PathProgramCache]: Analyzing trace with hash 775346483, now seen corresponding path program 1 times [2022-07-13 22:26:39,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:39,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698736436] [2022-07-13 22:26:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:39,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:39,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:39,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698736436] [2022-07-13 22:26:39,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698736436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:39,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:39,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:26:39,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213856547] [2022-07-13 22:26:39,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:39,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:26:39,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:39,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:26:39,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:26:39,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 66 [2022-07-13 22:26:39,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:39,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 66 [2022-07-13 22:26:39,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:39,890 INFO L129 PetriNetUnfolder]: 0/61 cut-off events. [2022-07-13 22:26:39,897 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 22:26:39,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 61 events. 0/61 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-13 22:26:39,898 INFO L132 encePairwiseOnDemand]: 63/66 looper letters, 11 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2022-07-13 22:26:39,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 134 flow [2022-07-13 22:26:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:26:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:26:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-07-13 22:26:39,900 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2022-07-13 22:26:39,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-07-13 22:26:39,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-07-13 22:26:39,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:39,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-07-13 22:26:39,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,907 INFO L186 Difference]: Start difference. First operand has 51 places, 45 transitions, 100 flow. Second operand 3 states and 167 transitions. [2022-07-13 22:26:39,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 134 flow [2022-07-13 22:26:39,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:26:39,909 INFO L242 Difference]: Finished difference. Result has 54 places, 46 transitions, 112 flow [2022-07-13 22:26:39,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2022-07-13 22:26:39,913 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2022-07-13 22:26:39,913 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 112 flow [2022-07-13 22:26:39,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,913 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:39,914 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:39,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 22:26:39,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:39,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1083506660, now seen corresponding path program 1 times [2022-07-13 22:26:39,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:39,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024781244] [2022-07-13 22:26:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:39,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:26:39,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:39,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024781244] [2022-07-13 22:26:39,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024781244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:39,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:39,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:26:39,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239994498] [2022-07-13 22:26:39,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:39,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:26:39,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:39,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:26:39,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:26:39,963 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 66 [2022-07-13 22:26:39,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:39,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:39,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 66 [2022-07-13 22:26:39,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:39,988 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2022-07-13 22:26:39,992 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 22:26:39,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 87 events. 4/87 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 144 event pairs, 1 based on Foata normal form. 2/88 useless extension candidates. Maximal degree in co-relation 121. Up to 13 conditions per place. [2022-07-13 22:26:39,994 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 7 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2022-07-13 22:26:39,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 143 flow [2022-07-13 22:26:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:26:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:26:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-07-13 22:26:39,999 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2022-07-13 22:26:39,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-07-13 22:26:39,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-07-13 22:26:39,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:40,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-07-13 22:26:40,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,016 INFO L186 Difference]: Start difference. First operand has 54 places, 46 transitions, 112 flow. Second operand 3 states and 167 transitions. [2022-07-13 22:26:40,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 143 flow [2022-07-13 22:26:40,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:26:40,019 INFO L242 Difference]: Finished difference. Result has 56 places, 48 transitions, 129 flow [2022-07-13 22:26:40,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2022-07-13 22:26:40,022 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2022-07-13 22:26:40,022 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 129 flow [2022-07-13 22:26:40,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,023 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:40,024 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:40,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:26:40,024 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:40,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2017126046, now seen corresponding path program 1 times [2022-07-13 22:26:40,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:40,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84437620] [2022-07-13 22:26:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:40,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:40,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:40,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84437620] [2022-07-13 22:26:40,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84437620] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:40,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323510000] [2022-07-13 22:26:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:40,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:40,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:40,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:40,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:26:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:26:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:40,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:40,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323510000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:40,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:40,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 22:26:40,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94750320] [2022-07-13 22:26:40,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:40,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:26:40,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:40,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:26:40,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:26:40,361 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 66 [2022-07-13 22:26:40,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 129 flow. Second operand has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:40,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 66 [2022-07-13 22:26:40,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:40,456 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2022-07-13 22:26:40,457 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 22:26:40,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 59 events. 1/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 91. Up to 5 conditions per place. [2022-07-13 22:26:40,458 INFO L132 encePairwiseOnDemand]: 61/66 looper letters, 9 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2022-07-13 22:26:40,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 163 flow [2022-07-13 22:26:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:26:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:26:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 468 transitions. [2022-07-13 22:26:40,461 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2022-07-13 22:26:40,461 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 468 transitions. [2022-07-13 22:26:40,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 468 transitions. [2022-07-13 22:26:40,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:40,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 468 transitions. [2022-07-13 22:26:40,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,467 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,467 INFO L186 Difference]: Start difference. First operand has 56 places, 48 transitions, 129 flow. Second operand 9 states and 468 transitions. [2022-07-13 22:26:40,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 163 flow [2022-07-13 22:26:40,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:26:40,472 INFO L242 Difference]: Finished difference. Result has 60 places, 47 transitions, 134 flow [2022-07-13 22:26:40,472 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=134, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2022-07-13 22:26:40,473 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2022-07-13 22:26:40,473 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 134 flow [2022-07-13 22:26:40,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,474 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:40,474 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:40,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 22:26:40,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:40,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash 286308789, now seen corresponding path program 1 times [2022-07-13 22:26:40,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:40,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407403132] [2022-07-13 22:26:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:40,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:26:40,715 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 22:26:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:26:40,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 22:26:40,755 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 22:26:40,755 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 22:26:40,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 22:26:40,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 22:26:40,756 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 22:26:40,757 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 22:26:40,757 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 22:26:40,768 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 22:26:40,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 176 flow [2022-07-13 22:26:40,789 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2022-07-13 22:26:40,789 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-13 22:26:40,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 222 events. 24/222 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 507 event pairs, 1 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 16 conditions per place. [2022-07-13 22:26:40,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 176 flow [2022-07-13 22:26:40,791 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 52 transitions, 125 flow [2022-07-13 22:26:40,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:26:40,793 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@4256bd6b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78b6d79 [2022-07-13 22:26:40,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 22:26:40,795 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-13 22:26:40,796 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 22:26:40,796 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:40,796 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:40,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:40,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:40,797 INFO L85 PathProgramCache]: Analyzing trace with hash 898627868, now seen corresponding path program 1 times [2022-07-13 22:26:40,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:40,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261449088] [2022-07-13 22:26:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:40,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:40,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:40,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261449088] [2022-07-13 22:26:40,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261449088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:40,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:40,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:26:40,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145081001] [2022-07-13 22:26:40,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:40,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:26:40,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:26:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:26:40,828 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2022-07-13 22:26:40,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:40,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2022-07-13 22:26:40,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:40,860 INFO L129 PetriNetUnfolder]: 0/79 cut-off events. [2022-07-13 22:26:40,860 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 22:26:40,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 79 events. 0/79 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-13 22:26:40,860 INFO L132 encePairwiseOnDemand]: 69/73 looper letters, 12 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-07-13 22:26:40,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 159 flow [2022-07-13 22:26:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:26:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:26:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2022-07-13 22:26:40,862 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8447488584474886 [2022-07-13 22:26:40,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2022-07-13 22:26:40,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2022-07-13 22:26:40,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:40,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2022-07-13 22:26:40,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,864 INFO L186 Difference]: Start difference. First operand has 58 places, 52 transitions, 125 flow. Second operand 3 states and 185 transitions. [2022-07-13 22:26:40,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 159 flow [2022-07-13 22:26:40,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 153 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-13 22:26:40,867 INFO L242 Difference]: Finished difference. Result has 61 places, 52 transitions, 129 flow [2022-07-13 22:26:40,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2022-07-13 22:26:40,870 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2022-07-13 22:26:40,876 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 129 flow [2022-07-13 22:26:40,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,877 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:40,877 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:40,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 22:26:40,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:40,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:40,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1823512938, now seen corresponding path program 1 times [2022-07-13 22:26:40,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:40,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879126873] [2022-07-13 22:26:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:40,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:26:40,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:40,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879126873] [2022-07-13 22:26:40,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879126873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:40,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:40,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:26:40,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902689255] [2022-07-13 22:26:40,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:40,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:26:40,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:40,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:26:40,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:26:40,936 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2022-07-13 22:26:40,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:40,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2022-07-13 22:26:40,937 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:40,968 INFO L129 PetriNetUnfolder]: 21/145 cut-off events. [2022-07-13 22:26:40,969 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-13 22:26:40,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 145 events. 21/145 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 403 event pairs, 7 based on Foata normal form. 3/140 useless extension candidates. Maximal degree in co-relation 185. Up to 44 conditions per place. [2022-07-13 22:26:40,970 INFO L132 encePairwiseOnDemand]: 68/73 looper letters, 10 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2022-07-13 22:26:40,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 177 flow [2022-07-13 22:26:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:26:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:26:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2022-07-13 22:26:40,972 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2022-07-13 22:26:40,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2022-07-13 22:26:40,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2022-07-13 22:26:40,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:40,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2022-07-13 22:26:40,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,974 INFO L186 Difference]: Start difference. First operand has 61 places, 52 transitions, 129 flow. Second operand 3 states and 183 transitions. [2022-07-13 22:26:40,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 177 flow [2022-07-13 22:26:40,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:26:40,978 INFO L242 Difference]: Finished difference. Result has 63 places, 55 transitions, 153 flow [2022-07-13 22:26:40,979 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2022-07-13 22:26:40,979 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2022-07-13 22:26:40,980 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 153 flow [2022-07-13 22:26:40,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:40,980 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:40,980 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:40,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 22:26:40,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1587743943, now seen corresponding path program 1 times [2022-07-13 22:26:40,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:40,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18698180] [2022-07-13 22:26:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:40,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:41,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:41,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18698180] [2022-07-13 22:26:41,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18698180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:41,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449526977] [2022-07-13 22:26:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:41,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:41,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:41,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:41,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:26:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:41,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:26:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:41,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:41,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449526977] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:41,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:41,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 22:26:41,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976398118] [2022-07-13 22:26:41,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:41,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:26:41,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:41,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:26:41,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:26:41,164 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 73 [2022-07-13 22:26:41,165 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 153 flow. Second operand has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:41,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 73 [2022-07-13 22:26:41,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:41,240 INFO L129 PetriNetUnfolder]: 14/115 cut-off events. [2022-07-13 22:26:41,240 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:26:41,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 115 events. 14/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 234 event pairs, 6 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 130. Up to 29 conditions per place. [2022-07-13 22:26:41,242 INFO L132 encePairwiseOnDemand]: 67/73 looper letters, 13 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2022-07-13 22:26:41,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 219 flow [2022-07-13 22:26:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:26:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:26:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2022-07-13 22:26:41,244 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7899543378995434 [2022-07-13 22:26:41,244 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2022-07-13 22:26:41,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2022-07-13 22:26:41,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:41,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2022-07-13 22:26:41,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,248 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,248 INFO L186 Difference]: Start difference. First operand has 63 places, 55 transitions, 153 flow. Second operand 9 states and 519 transitions. [2022-07-13 22:26:41,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 219 flow [2022-07-13 22:26:41,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:26:41,250 INFO L242 Difference]: Finished difference. Result has 73 places, 61 transitions, 199 flow [2022-07-13 22:26:41,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2022-07-13 22:26:41,251 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 15 predicate places. [2022-07-13 22:26:41,251 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 199 flow [2022-07-13 22:26:41,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,252 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:41,252 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:41,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:26:41,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 22:26:41,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash 176735389, now seen corresponding path program 1 times [2022-07-13 22:26:41,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:41,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319711815] [2022-07-13 22:26:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:41,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:26:41,482 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 22:26:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:26:41,509 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 22:26:41,509 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 22:26:41,510 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 22:26:41,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 22:26:41,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 22:26:41,510 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 22:26:41,511 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 22:26:41,511 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 22:26:41,531 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 22:26:41,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 204 flow [2022-07-13 22:26:41,575 INFO L129 PetriNetUnfolder]: 47/377 cut-off events. [2022-07-13 22:26:41,575 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-13 22:26:41,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 377 events. 47/377 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1158 event pairs, 6 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 242. Up to 32 conditions per place. [2022-07-13 22:26:41,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 204 flow [2022-07-13 22:26:41,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 58 transitions, 148 flow [2022-07-13 22:26:41,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:26:41,579 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@4256bd6b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78b6d79 [2022-07-13 22:26:41,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 22:26:41,581 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-07-13 22:26:41,581 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 22:26:41,581 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:41,581 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:41,582 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2143368340, now seen corresponding path program 1 times [2022-07-13 22:26:41,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:41,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128590446] [2022-07-13 22:26:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:41,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:41,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128590446] [2022-07-13 22:26:41,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128590446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:41,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:41,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:26:41,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558293065] [2022-07-13 22:26:41,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:41,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:26:41,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:41,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:26:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:26:41,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 80 [2022-07-13 22:26:41,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:41,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 80 [2022-07-13 22:26:41,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:41,623 INFO L129 PetriNetUnfolder]: 0/97 cut-off events. [2022-07-13 22:26:41,623 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 22:26:41,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 97 events. 0/97 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-13 22:26:41,624 INFO L132 encePairwiseOnDemand]: 76/80 looper letters, 13 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2022-07-13 22:26:41,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 184 flow [2022-07-13 22:26:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:26:41,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:26:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2022-07-13 22:26:41,626 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8375 [2022-07-13 22:26:41,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2022-07-13 22:26:41,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2022-07-13 22:26:41,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:41,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2022-07-13 22:26:41,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,629 INFO L186 Difference]: Start difference. First operand has 66 places, 58 transitions, 148 flow. Second operand 3 states and 201 transitions. [2022-07-13 22:26:41,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 184 flow [2022-07-13 22:26:41,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 172 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-13 22:26:41,632 INFO L242 Difference]: Finished difference. Result has 69 places, 58 transitions, 146 flow [2022-07-13 22:26:41,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2022-07-13 22:26:41,633 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2022-07-13 22:26:41,633 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 146 flow [2022-07-13 22:26:41,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,634 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:41,634 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:41,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 22:26:41,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:41,635 INFO L85 PathProgramCache]: Analyzing trace with hash -184146753, now seen corresponding path program 1 times [2022-07-13 22:26:41,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:41,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949323481] [2022-07-13 22:26:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:41,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:26:41,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:41,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949323481] [2022-07-13 22:26:41,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949323481] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:41,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:41,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:26:41,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730854725] [2022-07-13 22:26:41,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:41,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:26:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:41,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:26:41,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:26:41,662 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2022-07-13 22:26:41,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:41,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2022-07-13 22:26:41,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:41,713 INFO L129 PetriNetUnfolder]: 73/359 cut-off events. [2022-07-13 22:26:41,713 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-07-13 22:26:41,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 359 events. 73/359 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1605 event pairs, 35 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 523. Up to 126 conditions per place. [2022-07-13 22:26:41,717 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 13 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2022-07-13 22:26:41,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 211 flow [2022-07-13 22:26:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:26:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:26:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2022-07-13 22:26:41,719 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8291666666666667 [2022-07-13 22:26:41,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2022-07-13 22:26:41,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2022-07-13 22:26:41,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:41,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2022-07-13 22:26:41,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,721 INFO L186 Difference]: Start difference. First operand has 69 places, 58 transitions, 146 flow. Second operand 3 states and 199 transitions. [2022-07-13 22:26:41,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 211 flow [2022-07-13 22:26:41,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:26:41,724 INFO L242 Difference]: Finished difference. Result has 71 places, 62 transitions, 177 flow [2022-07-13 22:26:41,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2022-07-13 22:26:41,725 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2022-07-13 22:26:41,725 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 177 flow [2022-07-13 22:26:41,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,725 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:41,726 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:41,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 22:26:41,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:41,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1187205763, now seen corresponding path program 1 times [2022-07-13 22:26:41,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:41,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080171865] [2022-07-13 22:26:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:41,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:41,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:41,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080171865] [2022-07-13 22:26:41,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080171865] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:41,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058201223] [2022-07-13 22:26:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:41,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:41,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:41,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:41,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:26:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:41,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:26:41,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:41,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:41,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058201223] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:41,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:41,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 22:26:41,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126094283] [2022-07-13 22:26:41,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:41,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:26:41,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:26:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:26:41,912 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2022-07-13 22:26:41,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 177 flow. Second operand has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:41,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:41,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2022-07-13 22:26:41,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:42,000 INFO L129 PetriNetUnfolder]: 54/233 cut-off events. [2022-07-13 22:26:42,001 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-13 22:26:42,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 233 events. 54/233 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 824 event pairs, 28 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 324. Up to 92 conditions per place. [2022-07-13 22:26:42,003 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 14 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2022-07-13 22:26:42,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 245 flow [2022-07-13 22:26:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:26:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:26:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 565 transitions. [2022-07-13 22:26:42,005 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7847222222222222 [2022-07-13 22:26:42,005 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 565 transitions. [2022-07-13 22:26:42,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 565 transitions. [2022-07-13 22:26:42,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:42,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 565 transitions. [2022-07-13 22:26:42,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.77777777777778) internal successors, (565), 9 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:42,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:42,009 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:42,009 INFO L186 Difference]: Start difference. First operand has 71 places, 62 transitions, 177 flow. Second operand 9 states and 565 transitions. [2022-07-13 22:26:42,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 245 flow [2022-07-13 22:26:42,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:26:42,012 INFO L242 Difference]: Finished difference. Result has 81 places, 68 transitions, 222 flow [2022-07-13 22:26:42,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=222, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2022-07-13 22:26:42,013 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2022-07-13 22:26:42,013 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 222 flow [2022-07-13 22:26:42,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:42,013 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:42,014 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:42,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:26:42,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:42,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:42,236 INFO L85 PathProgramCache]: Analyzing trace with hash -909312246, now seen corresponding path program 1 times [2022-07-13 22:26:42,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:42,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136349716] [2022-07-13 22:26:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:42,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 22:26:42,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:42,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136349716] [2022-07-13 22:26:42,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136349716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:42,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797981537] [2022-07-13 22:26:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:42,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:42,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:42,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:26:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:26:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 22:26:42,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 22:26:42,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797981537] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:42,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:42,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-13 22:26:42,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28754617] [2022-07-13 22:26:42,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:42,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 22:26:42,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:42,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 22:26:42,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-13 22:26:42,573 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-13 22:26:42,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 222 flow. Second operand has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:42,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:42,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-13 22:26:42,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:43,110 INFO L129 PetriNetUnfolder]: 768/1923 cut-off events. [2022-07-13 22:26:43,110 INFO L130 PetriNetUnfolder]: For 1173/1181 co-relation queries the response was YES. [2022-07-13 22:26:43,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4592 conditions, 1923 events. 768/1923 cut-off events. For 1173/1181 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12729 event pairs, 55 based on Foata normal form. 13/1936 useless extension candidates. Maximal degree in co-relation 1670. Up to 663 conditions per place. [2022-07-13 22:26:43,128 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 70 selfloop transitions, 66 changer transitions 0/175 dead transitions. [2022-07-13 22:26:43,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 999 flow [2022-07-13 22:26:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 22:26:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 22:26:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1082 transitions. [2022-07-13 22:26:43,132 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7118421052631579 [2022-07-13 22:26:43,132 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1082 transitions. [2022-07-13 22:26:43,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1082 transitions. [2022-07-13 22:26:43,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:43,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1082 transitions. [2022-07-13 22:26:43,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:43,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:43,139 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:43,139 INFO L186 Difference]: Start difference. First operand has 81 places, 68 transitions, 222 flow. Second operand 19 states and 1082 transitions. [2022-07-13 22:26:43,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 999 flow [2022-07-13 22:26:43,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 175 transitions, 971 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-13 22:26:43,146 INFO L242 Difference]: Finished difference. Result has 100 places, 121 transitions, 607 flow [2022-07-13 22:26:43,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=607, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2022-07-13 22:26:43,147 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2022-07-13 22:26:43,147 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 607 flow [2022-07-13 22:26:43,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:43,148 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:43,148 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:43,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:26:43,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 22:26:43,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1611844105, now seen corresponding path program 1 times [2022-07-13 22:26:43,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:43,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968469670] [2022-07-13 22:26:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:43,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:43,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:43,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968469670] [2022-07-13 22:26:43,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968469670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:43,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279494099] [2022-07-13 22:26:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:43,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:43,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:43,446 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:43,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:26:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 22:26:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:43,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:43,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279494099] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:43,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:43,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-13 22:26:43,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123914575] [2022-07-13 22:26:43,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:43,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:26:43,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:43,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:26:43,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:26:43,774 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2022-07-13 22:26:43,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 607 flow. Second operand has 20 states, 20 states have (on average 53.2) internal successors, (1064), 20 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:43,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:43,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2022-07-13 22:26:43,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:45,016 INFO L129 PetriNetUnfolder]: 1764/4221 cut-off events. [2022-07-13 22:26:45,016 INFO L130 PetriNetUnfolder]: For 4672/4682 co-relation queries the response was YES. [2022-07-13 22:26:45,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12332 conditions, 4221 events. 1764/4221 cut-off events. For 4672/4682 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 33221 event pairs, 62 based on Foata normal form. 28/4249 useless extension candidates. Maximal degree in co-relation 4743. Up to 1292 conditions per place. [2022-07-13 22:26:45,067 INFO L132 encePairwiseOnDemand]: 66/80 looper letters, 113 selfloop transitions, 180 changer transitions 0/337 dead transitions. [2022-07-13 22:26:45,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 337 transitions, 2519 flow [2022-07-13 22:26:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 22:26:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-13 22:26:45,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2224 transitions. [2022-07-13 22:26:45,077 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2022-07-13 22:26:45,077 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2224 transitions. [2022-07-13 22:26:45,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2224 transitions. [2022-07-13 22:26:45,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:45,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2224 transitions. [2022-07-13 22:26:45,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 54.24390243902439) internal successors, (2224), 41 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:45,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:45,091 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:45,091 INFO L186 Difference]: Start difference. First operand has 100 places, 121 transitions, 607 flow. Second operand 41 states and 2224 transitions. [2022-07-13 22:26:45,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 337 transitions, 2519 flow [2022-07-13 22:26:45,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 337 transitions, 2497 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-07-13 22:26:45,114 INFO L242 Difference]: Finished difference. Result has 140 places, 255 transitions, 1863 flow [2022-07-13 22:26:45,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1863, PETRI_PLACES=140, PETRI_TRANSITIONS=255} [2022-07-13 22:26:45,115 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2022-07-13 22:26:45,115 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 255 transitions, 1863 flow [2022-07-13 22:26:45,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.2) internal successors, (1064), 20 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:45,116 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:45,116 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:45,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:26:45,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 22:26:45,338 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:45,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:45,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1109338339, now seen corresponding path program 1 times [2022-07-13 22:26:45,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:45,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996902199] [2022-07-13 22:26:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:45,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:45,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:45,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996902199] [2022-07-13 22:26:45,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996902199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:45,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067130063] [2022-07-13 22:26:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:45,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:45,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:45,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:45,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:26:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:45,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:26:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:45,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:45,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067130063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:45,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:45,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 21 [2022-07-13 22:26:45,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568037500] [2022-07-13 22:26:45,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:45,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 22:26:45,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 22:26:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-07-13 22:26:45,719 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2022-07-13 22:26:45,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 255 transitions, 1863 flow. Second operand has 21 states, 21 states have (on average 52.904761904761905) internal successors, (1111), 21 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:45,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:45,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2022-07-13 22:26:45,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:47,479 INFO L129 PetriNetUnfolder]: 2712/6242 cut-off events. [2022-07-13 22:26:47,480 INFO L130 PetriNetUnfolder]: For 14537/14639 co-relation queries the response was YES. [2022-07-13 22:26:47,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20126 conditions, 6242 events. 2712/6242 cut-off events. For 14537/14639 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 51013 event pairs, 0 based on Foata normal form. 295/6536 useless extension candidates. Maximal degree in co-relation 9511. Up to 1549 conditions per place. [2022-07-13 22:26:47,555 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 380 selfloop transitions, 600 changer transitions 0/1041 dead transitions. [2022-07-13 22:26:47,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1041 transitions, 10637 flow [2022-07-13 22:26:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-13 22:26:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-13 22:26:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3228 transitions. [2022-07-13 22:26:47,562 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6838983050847458 [2022-07-13 22:26:47,562 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3228 transitions. [2022-07-13 22:26:47,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3228 transitions. [2022-07-13 22:26:47,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:47,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3228 transitions. [2022-07-13 22:26:47,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 54.71186440677966) internal successors, (3228), 59 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:47,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:47,577 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:47,578 INFO L186 Difference]: Start difference. First operand has 140 places, 255 transitions, 1863 flow. Second operand 59 states and 3228 transitions. [2022-07-13 22:26:47,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1041 transitions, 10637 flow [2022-07-13 22:26:47,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1041 transitions, 10210 flow, removed 15 selfloop flow, removed 15 redundant places. [2022-07-13 22:26:47,723 INFO L242 Difference]: Finished difference. Result has 187 places, 737 transitions, 6892 flow [2022-07-13 22:26:47,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=6892, PETRI_PLACES=187, PETRI_TRANSITIONS=737} [2022-07-13 22:26:47,724 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 121 predicate places. [2022-07-13 22:26:47,724 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 737 transitions, 6892 flow [2022-07-13 22:26:47,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.904761904761905) internal successors, (1111), 21 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:47,725 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:47,725 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:47,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 22:26:47,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:47,954 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:47,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:47,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1693116247, now seen corresponding path program 1 times [2022-07-13 22:26:47,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:47,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300652708] [2022-07-13 22:26:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:47,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:26:47,973 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 22:26:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 22:26:48,000 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 22:26:48,001 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 22:26:48,001 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 22:26:48,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 22:26:48,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 22:26:48,002 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:48,002 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 22:26:48,002 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-13 22:26:48,023 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-13 22:26:48,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 234 flow [2022-07-13 22:26:48,073 INFO L129 PetriNetUnfolder]: 98/672 cut-off events. [2022-07-13 22:26:48,074 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-13 22:26:48,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 672 events. 98/672 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2760 event pairs, 23 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 422. Up to 80 conditions per place. [2022-07-13 22:26:48,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 234 flow [2022-07-13 22:26:48,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 64 transitions, 173 flow [2022-07-13 22:26:48,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:26:48,084 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@4256bd6b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78b6d79 [2022-07-13 22:26:48,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 22:26:48,085 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-13 22:26:48,086 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 22:26:48,086 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:48,086 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:48,086 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:48,086 INFO L85 PathProgramCache]: Analyzing trace with hash 239291490, now seen corresponding path program 1 times [2022-07-13 22:26:48,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:48,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803699250] [2022-07-13 22:26:48,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:48,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:48,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:48,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803699250] [2022-07-13 22:26:48,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803699250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:48,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:48,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:26:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085270112] [2022-07-13 22:26:48,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:48,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:26:48,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:48,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:26:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:26:48,104 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 87 [2022-07-13 22:26:48,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 173 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:48,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 87 [2022-07-13 22:26:48,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:48,116 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2022-07-13 22:26:48,117 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-07-13 22:26:48,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 118 events. 0/118 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 6/118 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-13 22:26:48,117 INFO L132 encePairwiseOnDemand]: 86/87 looper letters, 5 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2022-07-13 22:26:48,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 181 flow [2022-07-13 22:26:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:26:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:26:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-07-13 22:26:48,119 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8735632183908046 [2022-07-13 22:26:48,119 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-07-13 22:26:48,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-07-13 22:26:48,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:48,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-07-13 22:26:48,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,120 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,120 INFO L186 Difference]: Start difference. First operand has 74 places, 64 transitions, 173 flow. Second operand 2 states and 152 transitions. [2022-07-13 22:26:48,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 181 flow [2022-07-13 22:26:48,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 161 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-13 22:26:48,122 INFO L242 Difference]: Finished difference. Result has 75 places, 63 transitions, 151 flow [2022-07-13 22:26:48,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=151, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2022-07-13 22:26:48,123 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-07-13 22:26:48,123 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 151 flow [2022-07-13 22:26:48,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,123 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:48,123 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:48,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 22:26:48,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash 239292451, now seen corresponding path program 1 times [2022-07-13 22:26:48,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:48,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117495762] [2022-07-13 22:26:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:48,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:48,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:48,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117495762] [2022-07-13 22:26:48,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117495762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:48,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:48,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:26:48,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902914367] [2022-07-13 22:26:48,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:48,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:26:48,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:26:48,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:26:48,141 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 87 [2022-07-13 22:26:48,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:48,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 87 [2022-07-13 22:26:48,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:48,161 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2022-07-13 22:26:48,161 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:26:48,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 115 events. 0/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-13 22:26:48,161 INFO L132 encePairwiseOnDemand]: 84/87 looper letters, 14 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-07-13 22:26:48,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 191 flow [2022-07-13 22:26:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:26:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:26:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-07-13 22:26:48,163 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2022-07-13 22:26:48,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-07-13 22:26:48,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-07-13 22:26:48,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:48,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-07-13 22:26:48,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,165 INFO L186 Difference]: Start difference. First operand has 75 places, 63 transitions, 151 flow. Second operand 3 states and 215 transitions. [2022-07-13 22:26:48,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 191 flow [2022-07-13 22:26:48,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:26:48,167 INFO L242 Difference]: Finished difference. Result has 78 places, 64 transitions, 163 flow [2022-07-13 22:26:48,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2022-07-13 22:26:48,168 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-07-13 22:26:48,168 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 163 flow [2022-07-13 22:26:48,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,169 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:48,169 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:48,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 22:26:48,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:48,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:48,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1483448859, now seen corresponding path program 1 times [2022-07-13 22:26:48,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:48,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365840106] [2022-07-13 22:26:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:48,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:26:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:48,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365840106] [2022-07-13 22:26:48,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365840106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:48,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:26:48,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 22:26:48,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173273002] [2022-07-13 22:26:48,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:48,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 22:26:48,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:48,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 22:26:48,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 22:26:48,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 87 [2022-07-13 22:26:48,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:48,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 87 [2022-07-13 22:26:48,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:48,300 INFO L129 PetriNetUnfolder]: 212/733 cut-off events. [2022-07-13 22:26:48,300 INFO L130 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-07-13 22:26:48,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 733 events. 212/733 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4075 event pairs, 118 based on Foata normal form. 5/703 useless extension candidates. Maximal degree in co-relation 1195. Up to 327 conditions per place. [2022-07-13 22:26:48,306 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 16 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2022-07-13 22:26:48,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 245 flow [2022-07-13 22:26:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 22:26:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 22:26:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-07-13 22:26:48,307 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2022-07-13 22:26:48,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-07-13 22:26:48,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-07-13 22:26:48,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:48,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-07-13 22:26:48,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,309 INFO L186 Difference]: Start difference. First operand has 78 places, 64 transitions, 163 flow. Second operand 3 states and 215 transitions. [2022-07-13 22:26:48,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 245 flow [2022-07-13 22:26:48,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:26:48,312 INFO L242 Difference]: Finished difference. Result has 80 places, 69 transitions, 201 flow [2022-07-13 22:26:48,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2022-07-13 22:26:48,312 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2022-07-13 22:26:48,312 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 201 flow [2022-07-13 22:26:48,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,313 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:48,313 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:48,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 22:26:48,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:48,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1737726477, now seen corresponding path program 1 times [2022-07-13 22:26:48,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:48,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505112866] [2022-07-13 22:26:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:48,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:48,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:48,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505112866] [2022-07-13 22:26:48,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505112866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:48,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024726490] [2022-07-13 22:26:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:48,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:48,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:48,345 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:48,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:26:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 22:26:48,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:48,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:48,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024726490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:48,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:48,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 22:26:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180568787] [2022-07-13 22:26:48,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:48,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:26:48,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:26:48,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 22:26:48,482 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-13 22:26:48,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 201 flow. Second operand has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:48,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-13 22:26:48,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:48,576 INFO L129 PetriNetUnfolder]: 161/489 cut-off events. [2022-07-13 22:26:48,576 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 22:26:48,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 489 events. 161/489 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2395 event pairs, 94 based on Foata normal form. 2/445 useless extension candidates. Maximal degree in co-relation 801. Up to 246 conditions per place. [2022-07-13 22:26:48,580 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2022-07-13 22:26:48,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 271 flow [2022-07-13 22:26:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:26:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:26:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 611 transitions. [2022-07-13 22:26:48,582 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7803320561941252 [2022-07-13 22:26:48,583 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 611 transitions. [2022-07-13 22:26:48,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 611 transitions. [2022-07-13 22:26:48,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:48,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 611 transitions. [2022-07-13 22:26:48,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 67.88888888888889) internal successors, (611), 9 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,586 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,586 INFO L186 Difference]: Start difference. First operand has 80 places, 69 transitions, 201 flow. Second operand 9 states and 611 transitions. [2022-07-13 22:26:48,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 271 flow [2022-07-13 22:26:48,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 79 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 22:26:48,588 INFO L242 Difference]: Finished difference. Result has 90 places, 75 transitions, 245 flow [2022-07-13 22:26:48,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=245, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2022-07-13 22:26:48,589 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2022-07-13 22:26:48,589 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 245 flow [2022-07-13 22:26:48,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:48,590 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:48,590 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:48,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 22:26:48,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:48,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:48,812 INFO L85 PathProgramCache]: Analyzing trace with hash 157483872, now seen corresponding path program 1 times [2022-07-13 22:26:48,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:48,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382813130] [2022-07-13 22:26:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:48,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 22:26:48,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:48,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382813130] [2022-07-13 22:26:48,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382813130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:48,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878422077] [2022-07-13 22:26:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:48,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:48,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:48,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:48,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:26:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:48,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:26:48,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:49,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:49,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878422077] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:49,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:49,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 16 [2022-07-13 22:26:49,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617520086] [2022-07-13 22:26:49,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:49,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:26:49,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:49,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:26:49,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:26:49,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-07-13 22:26:49,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 245 flow. Second operand has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:49,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:49,127 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-07-13 22:26:49,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:50,909 INFO L129 PetriNetUnfolder]: 2264/4343 cut-off events. [2022-07-13 22:26:50,909 INFO L130 PetriNetUnfolder]: For 2428/2428 co-relation queries the response was YES. [2022-07-13 22:26:50,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11220 conditions, 4343 events. 2264/4343 cut-off events. For 2428/2428 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 28570 event pairs, 78 based on Foata normal form. 74/4417 useless extension candidates. Maximal degree in co-relation 11207. Up to 1984 conditions per place. [2022-07-13 22:26:50,952 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 171 selfloop transitions, 243 changer transitions 0/454 dead transitions. [2022-07-13 22:26:50,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 454 transitions, 2650 flow [2022-07-13 22:26:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-13 22:26:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-07-13 22:26:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4667 transitions. [2022-07-13 22:26:50,966 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6790339007711335 [2022-07-13 22:26:50,966 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4667 transitions. [2022-07-13 22:26:50,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4667 transitions. [2022-07-13 22:26:50,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:50,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4667 transitions. [2022-07-13 22:26:50,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 59.075949367088604) internal successors, (4667), 79 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:50,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:50,993 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:50,994 INFO L186 Difference]: Start difference. First operand has 90 places, 75 transitions, 245 flow. Second operand 79 states and 4667 transitions. [2022-07-13 22:26:50,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 454 transitions, 2650 flow [2022-07-13 22:26:51,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 454 transitions, 2598 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-07-13 22:26:51,006 INFO L242 Difference]: Finished difference. Result has 193 places, 311 transitions, 1969 flow [2022-07-13 22:26:51,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=1969, PETRI_PLACES=193, PETRI_TRANSITIONS=311} [2022-07-13 22:26:51,007 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 119 predicate places. [2022-07-13 22:26:51,007 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 311 transitions, 1969 flow [2022-07-13 22:26:51,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:51,020 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:51,020 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:51,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 22:26:51,227 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,SelfDestructingSolverStorable24 [2022-07-13 22:26:51,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash -184578877, now seen corresponding path program 1 times [2022-07-13 22:26:51,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:51,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828739934] [2022-07-13 22:26:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:51,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 88 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:51,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:51,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828739934] [2022-07-13 22:26:51,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828739934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:51,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263476091] [2022-07-13 22:26:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:51,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:51,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:51,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:51,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 22:26:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:51,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:26:51,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:51,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:26:51,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263476091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:26:51,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:26:51,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2022-07-13 22:26:51,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338527119] [2022-07-13 22:26:51,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:26:51,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 22:26:51,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:51,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 22:26:51,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-13 22:26:51,578 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-13 22:26:51,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 311 transitions, 1969 flow. Second operand has 13 states, 13 states have (on average 67.61538461538461) internal successors, (879), 13 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:51,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:51,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-13 22:26:51,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:52,408 INFO L129 PetriNetUnfolder]: 971/2563 cut-off events. [2022-07-13 22:26:52,409 INFO L130 PetriNetUnfolder]: For 26892/27559 co-relation queries the response was YES. [2022-07-13 22:26:52,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12027 conditions, 2563 events. 971/2563 cut-off events. For 26892/27559 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18930 event pairs, 217 based on Foata normal form. 390/2836 useless extension candidates. Maximal degree in co-relation 11987. Up to 1049 conditions per place. [2022-07-13 22:26:52,448 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 17 selfloop transitions, 82 changer transitions 0/311 dead transitions. [2022-07-13 22:26:52,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 311 transitions, 2137 flow [2022-07-13 22:26:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 22:26:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 22:26:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1204 transitions. [2022-07-13 22:26:52,450 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.768837803320562 [2022-07-13 22:26:52,451 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1204 transitions. [2022-07-13 22:26:52,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1204 transitions. [2022-07-13 22:26:52,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:52,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1204 transitions. [2022-07-13 22:26:52,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.88888888888889) internal successors, (1204), 18 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:52,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 87.0) internal successors, (1653), 19 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:52,456 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 87.0) internal successors, (1653), 19 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:52,456 INFO L186 Difference]: Start difference. First operand has 193 places, 311 transitions, 1969 flow. Second operand 18 states and 1204 transitions. [2022-07-13 22:26:52,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 311 transitions, 2137 flow [2022-07-13 22:26:52,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 311 transitions, 1953 flow, removed 27 selfloop flow, removed 12 redundant places. [2022-07-13 22:26:52,527 INFO L242 Difference]: Finished difference. Result has 197 places, 304 transitions, 1885 flow [2022-07-13 22:26:52,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1885, PETRI_PLACES=197, PETRI_TRANSITIONS=304} [2022-07-13 22:26:52,528 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 123 predicate places. [2022-07-13 22:26:52,528 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 304 transitions, 1885 flow [2022-07-13 22:26:52,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.61538461538461) internal successors, (879), 13 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:52,529 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:52,529 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:52,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 22:26:52,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 22:26:52,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash -870176612, now seen corresponding path program 1 times [2022-07-13 22:26:52,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:52,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512931839] [2022-07-13 22:26:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:52,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 22:26:52,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:52,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512931839] [2022-07-13 22:26:52,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512931839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:52,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453870485] [2022-07-13 22:26:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:52,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:52,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:52,831 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:52,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 22:26:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:52,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 22:26:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 22:26:53,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 22:26:53,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453870485] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:53,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:53,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-13 22:26:53,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166521903] [2022-07-13 22:26:53,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:53,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:26:53,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:26:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:26:53,124 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-07-13 22:26:53,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 304 transitions, 1885 flow. Second operand has 20 states, 20 states have (on average 57.1) internal successors, (1142), 20 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:53,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:53,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-07-13 22:26:53,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:54,708 INFO L129 PetriNetUnfolder]: 4041/7980 cut-off events. [2022-07-13 22:26:54,708 INFO L130 PetriNetUnfolder]: For 72973/72994 co-relation queries the response was YES. [2022-07-13 22:26:54,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37943 conditions, 7980 events. 4041/7980 cut-off events. For 72973/72994 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 59649 event pairs, 68 based on Foata normal form. 44/8024 useless extension candidates. Maximal degree in co-relation 37905. Up to 3105 conditions per place. [2022-07-13 22:26:54,944 INFO L132 encePairwiseOnDemand]: 72/87 looper letters, 333 selfloop transitions, 374 changer transitions 0/794 dead transitions. [2022-07-13 22:26:54,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 794 transitions, 7248 flow [2022-07-13 22:26:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 22:26:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-13 22:26:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2406 transitions. [2022-07-13 22:26:54,950 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6745164003364171 [2022-07-13 22:26:54,950 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2406 transitions. [2022-07-13 22:26:54,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2406 transitions. [2022-07-13 22:26:54,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:54,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2406 transitions. [2022-07-13 22:26:54,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.68292682926829) internal successors, (2406), 41 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:54,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:54,961 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:54,961 INFO L186 Difference]: Start difference. First operand has 197 places, 304 transitions, 1885 flow. Second operand 41 states and 2406 transitions. [2022-07-13 22:26:54,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 794 transitions, 7248 flow [2022-07-13 22:26:55,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 794 transitions, 6504 flow, removed 0 selfloop flow, removed 15 redundant places. [2022-07-13 22:26:55,225 INFO L242 Difference]: Finished difference. Result has 224 places, 566 transitions, 4395 flow [2022-07-13 22:26:55,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=4395, PETRI_PLACES=224, PETRI_TRANSITIONS=566} [2022-07-13 22:26:55,226 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 150 predicate places. [2022-07-13 22:26:55,226 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 566 transitions, 4395 flow [2022-07-13 22:26:55,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.1) internal successors, (1142), 20 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:55,227 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:55,227 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:55,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 22:26:55,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-13 22:26:55,443 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:55,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1484109075, now seen corresponding path program 1 times [2022-07-13 22:26:55,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:55,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783230020] [2022-07-13 22:26:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:55,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 22:26:55,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:55,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783230020] [2022-07-13 22:26:55,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783230020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:55,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076873433] [2022-07-13 22:26:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:55,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:55,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:55,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:55,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 22:26:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:55,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:26:55,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 22:26:55,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 22:26:55,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076873433] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:55,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:55,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-07-13 22:26:55,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286935481] [2022-07-13 22:26:55,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:55,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:26:55,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:55,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:26:55,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:26:55,926 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-07-13 22:26:55,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 566 transitions, 4395 flow. Second operand has 23 states, 23 states have (on average 57.34782608695652) internal successors, (1319), 23 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:55,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:55,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-07-13 22:26:55,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:59,177 INFO L129 PetriNetUnfolder]: 7788/15587 cut-off events. [2022-07-13 22:26:59,177 INFO L130 PetriNetUnfolder]: For 168464/168549 co-relation queries the response was YES. [2022-07-13 22:26:59,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76797 conditions, 15587 events. 7788/15587 cut-off events. For 168464/168549 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 132285 event pairs, 95 based on Foata normal form. 90/15672 useless extension candidates. Maximal degree in co-relation 76757. Up to 5383 conditions per place. [2022-07-13 22:26:59,384 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 392 selfloop transitions, 859 changer transitions 0/1356 dead transitions. [2022-07-13 22:26:59,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1356 transitions, 14830 flow [2022-07-13 22:26:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-13 22:26:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-13 22:26:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3846 transitions. [2022-07-13 22:26:59,393 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.680106100795756 [2022-07-13 22:26:59,393 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3846 transitions. [2022-07-13 22:26:59,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3846 transitions. [2022-07-13 22:26:59,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:59,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3846 transitions. [2022-07-13 22:26:59,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 59.16923076923077) internal successors, (3846), 65 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:59,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:59,407 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:26:59,408 INFO L186 Difference]: Start difference. First operand has 224 places, 566 transitions, 4395 flow. Second operand 65 states and 3846 transitions. [2022-07-13 22:26:59,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1356 transitions, 14830 flow [2022-07-13 22:27:00,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1356 transitions, 14017 flow, removed 233 selfloop flow, removed 10 redundant places. [2022-07-13 22:27:00,166 INFO L242 Difference]: Finished difference. Result has 286 places, 1129 transitions, 11002 flow [2022-07-13 22:27:00,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=11002, PETRI_PLACES=286, PETRI_TRANSITIONS=1129} [2022-07-13 22:27:00,168 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 212 predicate places. [2022-07-13 22:27:00,168 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1129 transitions, 11002 flow [2022-07-13 22:27:00,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.34782608695652) internal successors, (1319), 23 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:00,168 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:27:00,169 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:27:00,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 22:27:00,379 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,SelfDestructingSolverStorable27 [2022-07-13 22:27:00,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:27:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:27:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1549657633, now seen corresponding path program 1 times [2022-07-13 22:27:00,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:27:00,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983715650] [2022-07-13 22:27:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:27:00,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:27:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:27:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:27:00,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:27:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983715650] [2022-07-13 22:27:00,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983715650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:27:00,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836140994] [2022-07-13 22:27:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:27:00,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:27:00,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:27:00,490 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:27:00,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 22:27:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:27:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 22:27:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:27:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:27:00,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:27:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:27:00,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836140994] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:27:00,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:27:00,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-07-13 22:27:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446588166] [2022-07-13 22:27:00,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:27:00,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:27:00,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:27:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:27:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:27:00,867 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-07-13 22:27:00,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1129 transitions, 11002 flow. Second operand has 23 states, 23 states have (on average 57.26086956521739) internal successors, (1317), 23 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:00,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:27:00,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-07-13 22:27:00,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:27:06,938 INFO L129 PetriNetUnfolder]: 13819/27786 cut-off events. [2022-07-13 22:27:06,938 INFO L130 PetriNetUnfolder]: For 320138/320568 co-relation queries the response was YES. [2022-07-13 22:27:07,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138206 conditions, 27786 events. 13819/27786 cut-off events. For 320138/320568 co-relation queries the response was YES. Maximal size of possible extension queue 1345. Compared 259874 event pairs, 117 based on Foata normal form. 304/28067 useless extension candidates. Maximal degree in co-relation 138163. Up to 8282 conditions per place. [2022-07-13 22:27:07,532 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 453 selfloop transitions, 1615 changer transitions 0/2203 dead transitions. [2022-07-13 22:27:07,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 2203 transitions, 27206 flow [2022-07-13 22:27:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-13 22:27:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-13 22:27:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3140 transitions. [2022-07-13 22:27:07,536 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6809802645846887 [2022-07-13 22:27:07,536 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3140 transitions. [2022-07-13 22:27:07,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3140 transitions. [2022-07-13 22:27:07,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:27:07,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3140 transitions. [2022-07-13 22:27:07,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 59.24528301886792) internal successors, (3140), 53 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:07,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:07,547 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:07,547 INFO L186 Difference]: Start difference. First operand has 286 places, 1129 transitions, 11002 flow. Second operand 53 states and 3140 transitions. [2022-07-13 22:27:07,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 2203 transitions, 27206 flow [2022-07-13 22:27:10,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2203 transitions, 26708 flow, removed 182 selfloop flow, removed 15 redundant places. [2022-07-13 22:27:10,426 INFO L242 Difference]: Finished difference. Result has 328 places, 2016 transitions, 24087 flow [2022-07-13 22:27:10,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=10668, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=24087, PETRI_PLACES=328, PETRI_TRANSITIONS=2016} [2022-07-13 22:27:10,428 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 254 predicate places. [2022-07-13 22:27:10,428 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 2016 transitions, 24087 flow [2022-07-13 22:27:10,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.26086956521739) internal successors, (1317), 23 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:10,429 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:27:10,429 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:27:10,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 22:27:10,643 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,SelfDestructingSolverStorable28 [2022-07-13 22:27:10,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:27:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:27:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash 933906732, now seen corresponding path program 1 times [2022-07-13 22:27:10,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:27:10,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63177605] [2022-07-13 22:27:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:27:10,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:27:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:27:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-13 22:27:10,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:27:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63177605] [2022-07-13 22:27:10,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63177605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:27:10,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:27:10,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:27:10,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531733586] [2022-07-13 22:27:10,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:27:10,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:27:10,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:27:10,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:27:10,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:27:10,705 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 87 [2022-07-13 22:27:10,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 2016 transitions, 24087 flow. Second operand has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:10,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:27:10,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 87 [2022-07-13 22:27:10,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:27:19,383 INFO L129 PetriNetUnfolder]: 20253/41766 cut-off events. [2022-07-13 22:27:19,383 INFO L130 PetriNetUnfolder]: For 449219/449700 co-relation queries the response was YES. [2022-07-13 22:27:20,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195728 conditions, 41766 events. 20253/41766 cut-off events. For 449219/449700 co-relation queries the response was YES. Maximal size of possible extension queue 2157. Compared 434324 event pairs, 146 based on Foata normal form. 469/42161 useless extension candidates. Maximal degree in co-relation 195681. Up to 10349 conditions per place. [2022-07-13 22:27:20,257 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 0 selfloop transitions, 0 changer transitions 3079/3079 dead transitions. [2022-07-13 22:27:20,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 3079 transitions, 44657 flow [2022-07-13 22:27:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 22:27:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-13 22:27:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1052 transitions. [2022-07-13 22:27:20,259 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.711291413116971 [2022-07-13 22:27:20,259 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1052 transitions. [2022-07-13 22:27:20,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1052 transitions. [2022-07-13 22:27:20,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:27:20,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1052 transitions. [2022-07-13 22:27:20,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 61.88235294117647) internal successors, (1052), 17 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:20,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:20,264 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:20,264 INFO L186 Difference]: Start difference. First operand has 328 places, 2016 transitions, 24087 flow. Second operand 17 states and 1052 transitions. [2022-07-13 22:27:20,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 3079 transitions, 44657 flow [2022-07-13 22:27:29,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 3079 transitions, 43734 flow, removed 270 selfloop flow, removed 21 redundant places. [2022-07-13 22:27:29,510 INFO L242 Difference]: Finished difference. Result has 321 places, 0 transitions, 0 flow [2022-07-13 22:27:29,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23326, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=0, PETRI_PLACES=321, PETRI_TRANSITIONS=0} [2022-07-13 22:27:29,513 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2022-07-13 22:27:29,513 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 0 transitions, 0 flow [2022-07-13 22:27:29,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:27:29,518 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-13 22:27:29,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2022-07-13 22:27:29,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-13 22:27:29,520 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:27:29,522 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2022-07-13 22:27:29,522 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 22:27:29,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 10:27:29 BasicIcfg [2022-07-13 22:27:29,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 22:27:29,536 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 22:27:29,536 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 22:27:29,536 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 22:27:29,537 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:26:38" (3/4) ... [2022-07-13 22:27:29,539 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 22:27:29,543 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread [2022-07-13 22:27:29,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-07-13 22:27:29,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-07-13 22:27:29,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 22:27:29,546 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 22:27:29,571 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 22:27:29,571 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 22:27:29,572 INFO L158 Benchmark]: Toolchain (without parser) took 51535.62ms. Allocated memory was 94.4MB in the beginning and 6.6GB in the end (delta: 6.5GB). Free memory was 57.4MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2022-07-13 22:27:29,572 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 94.4MB. Free memory was 75.0MB in the beginning and 74.9MB in the end (delta: 74.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 22:27:29,573 INFO L158 Benchmark]: CACSL2BoogieTranslator took 441.65ms. Allocated memory is still 94.4MB. Free memory was 57.3MB in the beginning and 72.2MB in the end (delta: -14.9MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. [2022-07-13 22:27:29,573 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.14ms. Allocated memory is still 94.4MB. Free memory was 72.2MB in the beginning and 70.2MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 22:27:29,573 INFO L158 Benchmark]: Boogie Preprocessor took 54.01ms. Allocated memory is still 94.4MB. Free memory was 70.2MB in the beginning and 68.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 22:27:29,573 INFO L158 Benchmark]: RCFGBuilder took 358.21ms. Allocated memory is still 94.4MB. Free memory was 68.8MB in the beginning and 57.7MB in the end (delta: 11.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-13 22:27:29,573 INFO L158 Benchmark]: TraceAbstraction took 50596.80ms. Allocated memory was 94.4MB in the beginning and 6.6GB in the end (delta: 6.5GB). Free memory was 57.2MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 5.7GB. Max. memory is 16.1GB. [2022-07-13 22:27:29,573 INFO L158 Benchmark]: Witness Printer took 35.35ms. Allocated memory is still 6.6GB. Free memory was 5.0GB in the beginning and 5.0GB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-13 22:27:29,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 94.4MB. Free memory was 75.0MB in the beginning and 74.9MB in the end (delta: 74.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 441.65ms. Allocated memory is still 94.4MB. Free memory was 57.3MB in the beginning and 72.2MB in the end (delta: -14.9MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.14ms. Allocated memory is still 94.4MB. Free memory was 72.2MB in the beginning and 70.2MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 54.01ms. Allocated memory is still 94.4MB. Free memory was 70.2MB in the beginning and 68.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 358.21ms. Allocated memory is still 94.4MB. Free memory was 68.8MB in the beginning and 57.7MB in the end (delta: 11.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 50596.80ms. Allocated memory was 94.4MB in the beginning and 6.6GB in the end (delta: 6.5GB). Free memory was 57.2MB in the beginning and 5.0GB in the end (delta: -4.9GB). Peak memory consumption was 5.7GB. Max. memory is 16.1GB. * Witness Printer took 35.35ms. Allocated memory is still 6.6GB. Free memory was 5.0GB in the beginning and 5.0GB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 727]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 62 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 8 mSDtfsCounter, 13 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=3, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 106 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 68 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.0s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56 IncrementalHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 12 mSDtfsCounter, 56 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=4, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 196 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 181 ConstructedInterpolants, 0 QuantifiedInterpolants, 279 SizeOfPredicates, 2 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 74 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 70 IncrementalHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 14 mSDtfsCounter, 70 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=3, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 159 ConstructedInterpolants, 0 QuantifiedInterpolants, 257 SizeOfPredicates, 2 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 80 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.5s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1028 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1028 mSDsluCounter, 602 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 507 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 785 IncrementalHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 98 mSDtfsCounter, 785 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2572 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6892occurred in iteration=6, InterpolantAutomatonStates: 134, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 529 NumberOfCodeBlocks, 529 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 654 ConstructedInterpolants, 0 QuantifiedInterpolants, 1516 SizeOfPredicates, 26 NumberOfNonLiveVariables, 496 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 67/301 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 86 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 41.5s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 37.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2212 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2212 mSDsluCounter, 1285 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1094 mSDsCounter, 282 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1664 IncrementalHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 282 mSolverCounterUnsat, 195 mSDtfsCounter, 1664 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1027 GetRequests, 684 SyntacticMatches, 2 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7485 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24087occurred in iteration=9, InterpolantAutomatonStates: 290, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 945 NumberOfCodeBlocks, 945 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1244 ConstructedInterpolants, 0 QuantifiedInterpolants, 3228 SizeOfPredicates, 48 NumberOfNonLiveVariables, 941 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 500/1403 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-13 22:27:29,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE