./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/38_rand_cas_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-ext/38_rand_cas_vs_concur.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 628ef5ad19754647fb807fc1cc13e384334d380a6e3691b7b5f1842f42e5f662 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:37:51,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:37:51,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:37:51,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:37:51,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:37:51,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:37:51,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:37:51,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:37:51,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:37:51,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:37:51,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:37:51,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:37:51,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:37:51,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:37:51,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:37:51,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:37:51,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:37:51,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:37:51,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:37:51,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:37:51,811 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:37:51,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:37:51,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:37:51,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:37:51,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:37:51,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:37:51,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:37:51,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:37:51,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:37:51,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:37:51,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:37:51,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:37:51,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:37:51,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:37:51,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:37:51,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:37:51,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:37:51,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:37:51,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:37:51,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:37:51,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:37:51,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:37:51,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:37:51,860 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:37:51,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:37:51,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:37:51,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:37:51,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:37:51,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:37:51,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:37:51,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:37:51,863 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:37:51,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:37:51,864 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:37:51,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:37:51,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:37:51,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:37:51,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:37:51,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:37:51,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:37:51,865 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:37:51,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:37:51,865 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:37:51,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:37:51,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:37:51,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:37:51,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:37:51,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:37:51,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:37:51,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:37:51,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:37:51,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:37:51,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:37:51,867 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:37:51,867 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:37:51,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:37:51,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 628ef5ad19754647fb807fc1cc13e384334d380a6e3691b7b5f1842f42e5f662 [2022-07-21 08:37:52,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:37:52,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:37:52,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:37:52,191 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:37:52,191 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:37:52,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/38_rand_cas_vs_concur.i [2022-07-21 08:37:52,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6745204aa/62226b2444cf4edb9e417220b78e6f0b/FLAGb5713294c [2022-07-21 08:37:52,699 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:37:52,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/38_rand_cas_vs_concur.i [2022-07-21 08:37:52,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6745204aa/62226b2444cf4edb9e417220b78e6f0b/FLAGb5713294c [2022-07-21 08:37:53,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6745204aa/62226b2444cf4edb9e417220b78e6f0b [2022-07-21 08:37:53,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:37:53,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:37:53,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:37:53,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:37:53,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:37:53,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45fef096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53, skipping insertion in model container [2022-07-21 08:37:53,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:37:53,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:37:53,368 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-ext/38_rand_cas_vs_concur.i[30559,30572] [2022-07-21 08:37:53,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:37:53,376 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:37:53,419 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-ext/38_rand_cas_vs_concur.i[30559,30572] [2022-07-21 08:37:53,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:37:53,450 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:37:53,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53 WrapperNode [2022-07-21 08:37:53,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:37:53,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:37:53,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:37:53,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:37:53,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,484 INFO L137 Inliner]: procedures = 170, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 91 [2022-07-21 08:37:53,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:37:53,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:37:53,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:37:53,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:37:53,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:37:53,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:37:53,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:37:53,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:37:53,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (1/1) ... [2022-07-21 08:37:53,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:37:53,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:37:53,572 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) [2022-07-21 08:37:53,600 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 [2022-07-21 08:37:53,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:37:53,625 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-21 08:37:53,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-21 08:37:53,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:37:53,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:37:53,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:37:53,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:37:53,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:37:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:37:53,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:37:53,628 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:37:53,709 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:37:53,710 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:37:53,853 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:37:53,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:37:53,895 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 08:37:53,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:37:53 BoogieIcfgContainer [2022-07-21 08:37:53,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:37:53,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:37:53,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:37:53,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:37:53,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:37:53" (1/3) ... [2022-07-21 08:37:53,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485cf6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:37:53, skipping insertion in model container [2022-07-21 08:37:53,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:37:53" (2/3) ... [2022-07-21 08:37:53,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485cf6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:37:53, skipping insertion in model container [2022-07-21 08:37:53,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:37:53" (3/3) ... [2022-07-21 08:37:53,903 INFO L111 eAbstractionObserver]: Analyzing ICFG 38_rand_cas_vs_concur.i [2022-07-21 08:37:53,907 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:37:53,931 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:37:53,931 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:37:53,932 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:37:54,021 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:54,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 90 transitions, 185 flow [2022-07-21 08:37:54,132 INFO L129 PetriNetUnfolder]: 9/101 cut-off events. [2022-07-21 08:37:54,132 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:37:54,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 9/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 112 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2022-07-21 08:37:54,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 90 transitions, 185 flow [2022-07-21 08:37:54,142 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 90 transitions, 185 flow [2022-07-21 08:37:54,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:54,168 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@53b34110, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@726735aa [2022-07-21 08:37:54,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 08:37:54,187 INFO L129 PetriNetUnfolder]: 2/47 cut-off events. [2022-07-21 08:37:54,187 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:37:54,187 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:54,188 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] [2022-07-21 08:37:54,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:37:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:54,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2125340853, now seen corresponding path program 1 times [2022-07-21 08:37:54,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690037290] [2022-07-21 08:37:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:54,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:54,338 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:37:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:54,384 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:37:54,390 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:37:54,391 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-21 08:37:54,393 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-21 08:37:54,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-21 08:37:54,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:37:54,395 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:37:54,398 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:37:54,398 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:37:54,446 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:54,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 150 transitions, 312 flow [2022-07-21 08:37:54,502 INFO L129 PetriNetUnfolder]: 17/174 cut-off events. [2022-07-21 08:37:54,502 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:37:54,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 174 events. 17/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 398 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 131. Up to 6 conditions per place. [2022-07-21 08:37:54,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 150 transitions, 312 flow [2022-07-21 08:37:54,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 150 transitions, 312 flow [2022-07-21 08:37:54,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:54,515 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@53b34110, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@726735aa [2022-07-21 08:37:54,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:37:54,536 INFO L129 PetriNetUnfolder]: 4/82 cut-off events. [2022-07-21 08:37:54,536 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:37:54,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:54,536 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:37:54,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:37:54,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1802102159, now seen corresponding path program 1 times [2022-07-21 08:37:54,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:54,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807768631] [2022-07-21 08:37:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:54,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:54,563 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:37:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:54,604 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:37:54,604 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:37:54,604 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 08:37:54,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 08:37:54,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-21 08:37:54,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 08:37:54,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:37:54,605 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:37:54,606 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:37:54,606 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:37:54,684 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:54,691 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 195 places, 210 transitions, 441 flow [2022-07-21 08:37:54,749 INFO L129 PetriNetUnfolder]: 25/247 cut-off events. [2022-07-21 08:37:54,749 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:37:54,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 247 events. 25/247 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 751 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2022-07-21 08:37:54,756 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 210 transitions, 441 flow [2022-07-21 08:37:54,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 210 transitions, 441 flow [2022-07-21 08:37:54,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:54,761 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@53b34110, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@726735aa [2022-07-21 08:37:54,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:37:54,783 INFO L129 PetriNetUnfolder]: 6/113 cut-off events. [2022-07-21 08:37:54,787 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:37:54,788 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:54,788 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:37:54,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:37:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1761195697, now seen corresponding path program 1 times [2022-07-21 08:37:54,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:54,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813821614] [2022-07-21 08:37:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:54,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:54,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813821614] [2022-07-21 08:37:54,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813821614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:54,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:54,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:37:54,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313596596] [2022-07-21 08:37:54,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:54,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:37:54,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:54,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:37:54,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:37:54,899 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 210 [2022-07-21 08:37:54,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 210 transitions, 441 flow. Second operand has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:54,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:54,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 210 [2022-07-21 08:37:54,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:55,020 INFO L129 PetriNetUnfolder]: 31/461 cut-off events. [2022-07-21 08:37:55,021 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-21 08:37:55,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 461 events. 31/461 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1697 event pairs, 10 based on Foata normal form. 55/484 useless extension candidates. Maximal degree in co-relation 221. Up to 25 conditions per place. [2022-07-21 08:37:55,029 INFO L132 encePairwiseOnDemand]: 196/210 looper letters, 6 selfloop transitions, 0 changer transitions 0/188 dead transitions. [2022-07-21 08:37:55,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 188 transitions, 409 flow [2022-07-21 08:37:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:37:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:37:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 394 transitions. [2022-07-21 08:37:55,050 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9380952380952381 [2022-07-21 08:37:55,051 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 394 transitions. [2022-07-21 08:37:55,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 394 transitions. [2022-07-21 08:37:55,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:55,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 394 transitions. [2022-07-21 08:37:55,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 197.0) internal successors, (394), 2 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:55,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:55,068 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:55,070 INFO L186 Difference]: Start difference. First operand has 195 places, 210 transitions, 441 flow. Second operand 2 states and 394 transitions. [2022-07-21 08:37:55,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 188 transitions, 409 flow [2022-07-21 08:37:55,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 188 transitions, 403 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-21 08:37:55,081 INFO L242 Difference]: Finished difference. Result has 187 places, 188 transitions, 391 flow [2022-07-21 08:37:55,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=391, PETRI_PLACES=187, PETRI_TRANSITIONS=188} [2022-07-21 08:37:55,087 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, -8 predicate places. [2022-07-21 08:37:55,088 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 188 transitions, 391 flow [2022-07-21 08:37:55,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:55,089 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:55,089 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:37:55,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:37:55,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:37:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:55,091 INFO L85 PathProgramCache]: Analyzing trace with hash -851630582, now seen corresponding path program 1 times [2022-07-21 08:37:55,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:55,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189122805] [2022-07-21 08:37:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:55,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:55,151 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:37:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:55,180 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:37:55,183 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:37:55,183 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:37:55,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:37:55,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-21 08:37:55,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:37:55,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:37:55,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:37:55,184 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:37:55,185 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:37:55,185 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:37:55,250 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:55,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 250 places, 270 transitions, 572 flow [2022-07-21 08:37:55,313 INFO L129 PetriNetUnfolder]: 33/320 cut-off events. [2022-07-21 08:37:55,313 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:37:55,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 320 events. 33/320 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1121 event pairs, 0 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 255. Up to 10 conditions per place. [2022-07-21 08:37:55,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 270 transitions, 572 flow [2022-07-21 08:37:55,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 270 transitions, 572 flow [2022-07-21 08:37:55,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:55,331 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@53b34110, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@726735aa [2022-07-21 08:37:55,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:37:55,339 INFO L129 PetriNetUnfolder]: 6/108 cut-off events. [2022-07-21 08:37:55,340 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:37:55,340 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:55,340 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:37:55,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:37:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:55,341 INFO L85 PathProgramCache]: Analyzing trace with hash -810894887, now seen corresponding path program 1 times [2022-07-21 08:37:55,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:55,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713733507] [2022-07-21 08:37:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:55,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:55,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:55,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713733507] [2022-07-21 08:37:55,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713733507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:55,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:55,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:37:55,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316427215] [2022-07-21 08:37:55,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:55,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:37:55,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:55,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:37:55,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:37:55,404 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 270 [2022-07-21 08:37:55,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 270 transitions, 572 flow. Second operand has 2 states, 2 states have (on average 241.0) internal successors, (482), 2 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:55,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:55,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 270 [2022-07-21 08:37:55,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:55,616 INFO L129 PetriNetUnfolder]: 79/977 cut-off events. [2022-07-21 08:37:55,617 INFO L130 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-07-21 08:37:55,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 977 events. 79/977 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5361 event pairs, 34 based on Foata normal form. 151/1057 useless extension candidates. Maximal degree in co-relation 518. Up to 65 conditions per place. [2022-07-21 08:37:55,635 INFO L132 encePairwiseOnDemand]: 252/270 looper letters, 8 selfloop transitions, 0 changer transitions 0/243 dead transitions. [2022-07-21 08:37:55,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 243 transitions, 534 flow [2022-07-21 08:37:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:37:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:37:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 506 transitions. [2022-07-21 08:37:55,638 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.937037037037037 [2022-07-21 08:37:55,638 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 506 transitions. [2022-07-21 08:37:55,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 506 transitions. [2022-07-21 08:37:55,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:55,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 506 transitions. [2022-07-21 08:37:55,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 253.0) internal successors, (506), 2 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:55,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:55,644 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:55,644 INFO L186 Difference]: Start difference. First operand has 250 places, 270 transitions, 572 flow. Second operand 2 states and 506 transitions. [2022-07-21 08:37:55,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 243 transitions, 534 flow [2022-07-21 08:37:55,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 243 transitions, 522 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 08:37:55,657 INFO L242 Difference]: Finished difference. Result has 241 places, 243 transitions, 506 flow [2022-07-21 08:37:55,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=506, PETRI_PLACES=241, PETRI_TRANSITIONS=243} [2022-07-21 08:37:55,661 INFO L279 CegarLoopForPetriNet]: 250 programPoint places, -9 predicate places. [2022-07-21 08:37:55,661 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 243 transitions, 506 flow [2022-07-21 08:37:55,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 241.0) internal successors, (482), 2 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:55,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:55,662 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:37:55,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:37:55,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:37:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:55,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1680380666, now seen corresponding path program 1 times [2022-07-21 08:37:55,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:55,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679066755] [2022-07-21 08:37:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:55,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:55,711 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:37:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:55,737 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:37:55,741 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:37:55,741 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-21 08:37:55,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-21 08:37:55,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-21 08:37:55,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-21 08:37:55,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-21 08:37:55,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-21 08:37:55,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:37:55,746 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:37:55,754 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:37:55,754 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:37:55,811 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:55,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 305 places, 330 transitions, 705 flow [2022-07-21 08:37:55,894 INFO L129 PetriNetUnfolder]: 41/393 cut-off events. [2022-07-21 08:37:55,894 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-21 08:37:55,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 393 events. 41/393 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1490 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 333. Up to 12 conditions per place. [2022-07-21 08:37:55,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 330 transitions, 705 flow [2022-07-21 08:37:55,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 330 transitions, 705 flow [2022-07-21 08:37:55,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:55,913 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@53b34110, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@726735aa [2022-07-21 08:37:55,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:37:55,922 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2022-07-21 08:37:55,922 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:37:55,922 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:55,922 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:37:55,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:37:55,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1033681022, now seen corresponding path program 1 times [2022-07-21 08:37:55,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:55,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128248436] [2022-07-21 08:37:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:55,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:55,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128248436] [2022-07-21 08:37:55,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128248436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:55,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:55,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:37:55,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766167479] [2022-07-21 08:37:55,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:55,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:37:55,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:37:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:37:55,975 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 330 [2022-07-21 08:37:55,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 330 transitions, 705 flow. Second operand has 2 states, 2 states have (on average 294.0) internal successors, (588), 2 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:55,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:55,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 330 [2022-07-21 08:37:55,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:56,479 INFO L129 PetriNetUnfolder]: 191/2025 cut-off events. [2022-07-21 08:37:56,480 INFO L130 PetriNetUnfolder]: For 511/511 co-relation queries the response was YES. [2022-07-21 08:37:56,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 2025 events. 191/2025 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 14353 event pairs, 98 based on Foata normal form. 391/2266 useless extension candidates. Maximal degree in co-relation 1146. Up to 161 conditions per place. [2022-07-21 08:37:56,540 INFO L132 encePairwiseOnDemand]: 308/330 looper letters, 10 selfloop transitions, 0 changer transitions 0/298 dead transitions. [2022-07-21 08:37:56,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 298 transitions, 661 flow [2022-07-21 08:37:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:37:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:37:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 618 transitions. [2022-07-21 08:37:56,543 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9363636363636364 [2022-07-21 08:37:56,543 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 618 transitions. [2022-07-21 08:37:56,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 618 transitions. [2022-07-21 08:37:56,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:56,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 618 transitions. [2022-07-21 08:37:56,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 309.0) internal successors, (618), 2 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:56,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:56,547 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:56,547 INFO L186 Difference]: Start difference. First operand has 305 places, 330 transitions, 705 flow. Second operand 2 states and 618 transitions. [2022-07-21 08:37:56,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 298 transitions, 661 flow [2022-07-21 08:37:56,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 298 transitions, 641 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-21 08:37:56,556 INFO L242 Difference]: Finished difference. Result has 295 places, 298 transitions, 621 flow [2022-07-21 08:37:56,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=621, PETRI_PLACES=295, PETRI_TRANSITIONS=298} [2022-07-21 08:37:56,557 INFO L279 CegarLoopForPetriNet]: 305 programPoint places, -10 predicate places. [2022-07-21 08:37:56,558 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 298 transitions, 621 flow [2022-07-21 08:37:56,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 294.0) internal successors, (588), 2 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:56,558 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:56,558 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:37:56,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:37:56,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:37:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash -676471479, now seen corresponding path program 1 times [2022-07-21 08:37:56,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:56,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138559095] [2022-07-21 08:37:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:56,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:56,594 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:37:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:56,627 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:37:56,628 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:37:56,628 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-21 08:37:56,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-21 08:37:56,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-21 08:37:56,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-21 08:37:56,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-21 08:37:56,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-21 08:37:56,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-21 08:37:56,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:37:56,630 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:37:56,630 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:37:56,631 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-21 08:37:56,715 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:56,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 360 places, 390 transitions, 840 flow [2022-07-21 08:37:56,790 INFO L129 PetriNetUnfolder]: 49/466 cut-off events. [2022-07-21 08:37:56,791 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-21 08:37:56,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 466 events. 49/466 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1859 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 412. Up to 14 conditions per place. [2022-07-21 08:37:56,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 390 transitions, 840 flow [2022-07-21 08:37:56,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 390 transitions, 840 flow [2022-07-21 08:37:56,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:56,810 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@53b34110, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@726735aa [2022-07-21 08:37:56,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-21 08:37:56,822 INFO L129 PetriNetUnfolder]: 6/112 cut-off events. [2022-07-21 08:37:56,822 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:37:56,822 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:56,822 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:37:56,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-21 08:37:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash 78638174, now seen corresponding path program 1 times [2022-07-21 08:37:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:56,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48605107] [2022-07-21 08:37:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:56,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:56,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:56,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48605107] [2022-07-21 08:37:56,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48605107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:56,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:56,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:37:56,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478581538] [2022-07-21 08:37:56,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:56,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:37:56,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:56,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:37:56,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:37:56,846 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 390 [2022-07-21 08:37:56,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 390 transitions, 840 flow. Second operand has 2 states, 2 states have (on average 347.0) internal successors, (694), 2 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:56,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:56,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 390 [2022-07-21 08:37:56,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:37:57,962 INFO L129 PetriNetUnfolder]: 447/4153 cut-off events. [2022-07-21 08:37:57,962 INFO L130 PetriNetUnfolder]: For 1503/1503 co-relation queries the response was YES. [2022-07-21 08:37:58,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5121 conditions, 4153 events. 447/4153 cut-off events. For 1503/1503 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 36093 event pairs, 258 based on Foata normal form. 967/4812 useless extension candidates. Maximal degree in co-relation 2458. Up to 385 conditions per place. [2022-07-21 08:37:58,175 INFO L132 encePairwiseOnDemand]: 364/390 looper letters, 12 selfloop transitions, 0 changer transitions 0/353 dead transitions. [2022-07-21 08:37:58,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 353 transitions, 790 flow [2022-07-21 08:37:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:37:58,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:37:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 730 transitions. [2022-07-21 08:37:58,178 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9358974358974359 [2022-07-21 08:37:58,179 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 730 transitions. [2022-07-21 08:37:58,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 730 transitions. [2022-07-21 08:37:58,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:37:58,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 730 transitions. [2022-07-21 08:37:58,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 365.0) internal successors, (730), 2 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) [2022-07-21 08:37:58,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 390.0) internal successors, (1170), 3 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:58,184 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 390.0) internal successors, (1170), 3 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:58,184 INFO L186 Difference]: Start difference. First operand has 360 places, 390 transitions, 840 flow. Second operand 2 states and 730 transitions. [2022-07-21 08:37:58,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 353 transitions, 790 flow [2022-07-21 08:37:58,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 353 transitions, 760 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-21 08:37:58,191 INFO L242 Difference]: Finished difference. Result has 349 places, 353 transitions, 736 flow [2022-07-21 08:37:58,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=736, PETRI_PLACES=349, PETRI_TRANSITIONS=353} [2022-07-21 08:37:58,193 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, -11 predicate places. [2022-07-21 08:37:58,193 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 353 transitions, 736 flow [2022-07-21 08:37:58,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 347.0) internal successors, (694), 2 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:37:58,194 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:58,194 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:37:58,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:37:58,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-21 08:37:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash -186934261, now seen corresponding path program 1 times [2022-07-21 08:37:58,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:58,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543162310] [2022-07-21 08:37:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:58,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:58,225 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:37:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:37:58,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:37:58,251 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:37:58,251 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-07-21 08:37:58,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-07-21 08:37:58,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-07-21 08:37:58,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-07-21 08:37:58,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-07-21 08:37:58,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-07-21 08:37:58,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-07-21 08:37:58,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-07-21 08:37:58,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:37:58,253 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:37:58,255 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:37:58,255 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-21 08:37:58,320 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:37:58,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 415 places, 450 transitions, 977 flow [2022-07-21 08:37:58,419 INFO L129 PetriNetUnfolder]: 57/539 cut-off events. [2022-07-21 08:37:58,420 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-21 08:37:58,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 539 events. 57/539 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2198 event pairs, 0 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 492. Up to 16 conditions per place. [2022-07-21 08:37:58,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 415 places, 450 transitions, 977 flow [2022-07-21 08:37:58,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 415 places, 450 transitions, 977 flow [2022-07-21 08:37:58,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:37:58,440 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@53b34110, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@726735aa [2022-07-21 08:37:58,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-21 08:37:58,448 INFO L129 PetriNetUnfolder]: 6/112 cut-off events. [2022-07-21 08:37:58,448 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:37:58,448 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:37:58,448 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:37:58,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-07-21 08:37:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:37:58,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1450625029, now seen corresponding path program 1 times [2022-07-21 08:37:58,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:37:58,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76503604] [2022-07-21 08:37:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:37:58,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:37:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:37:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:37:58,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:37:58,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76503604] [2022-07-21 08:37:58,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76503604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:37:58,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:37:58,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:37:58,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806472785] [2022-07-21 08:37:58,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:37:58,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:37:58,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:37:58,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:37:58,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:37:58,479 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 450 [2022-07-21 08:37:58,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 450 transitions, 977 flow. Second operand has 2 states, 2 states have (on average 400.0) internal successors, (800), 2 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) [2022-07-21 08:37:58,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:37:58,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 450 [2022-07-21 08:37:58,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:38:01,029 INFO L129 PetriNetUnfolder]: 1023/8473 cut-off events. [2022-07-21 08:38:01,029 INFO L130 PetriNetUnfolder]: For 4159/4159 co-relation queries the response was YES. [2022-07-21 08:38:01,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10722 conditions, 8473 events. 1023/8473 cut-off events. For 4159/4159 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 87160 event pairs, 642 based on Foata normal form. 2311/10160 useless extension candidates. Maximal degree in co-relation 5194. Up to 897 conditions per place. [2022-07-21 08:38:01,263 INFO L132 encePairwiseOnDemand]: 420/450 looper letters, 14 selfloop transitions, 0 changer transitions 0/408 dead transitions. [2022-07-21 08:38:01,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 408 transitions, 921 flow [2022-07-21 08:38:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:38:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:38:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 842 transitions. [2022-07-21 08:38:01,266 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9355555555555556 [2022-07-21 08:38:01,267 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 842 transitions. [2022-07-21 08:38:01,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 842 transitions. [2022-07-21 08:38:01,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:38:01,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 842 transitions. [2022-07-21 08:38:01,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 421.0) internal successors, (842), 2 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:01,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 450.0) internal successors, (1350), 3 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:01,272 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 450.0) internal successors, (1350), 3 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:01,272 INFO L186 Difference]: Start difference. First operand has 415 places, 450 transitions, 977 flow. Second operand 2 states and 842 transitions. [2022-07-21 08:38:01,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 408 transitions, 921 flow [2022-07-21 08:38:01,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 408 transitions, 879 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-21 08:38:01,282 INFO L242 Difference]: Finished difference. Result has 403 places, 408 transitions, 851 flow [2022-07-21 08:38:01,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=851, PETRI_PLACES=403, PETRI_TRANSITIONS=408} [2022-07-21 08:38:01,284 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, -12 predicate places. [2022-07-21 08:38:01,284 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 408 transitions, 851 flow [2022-07-21 08:38:01,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 400.0) internal successors, (800), 2 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) [2022-07-21 08:38:01,284 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:01,285 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:38:01,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:38:01,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-07-21 08:38:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:01,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2116368612, now seen corresponding path program 1 times [2022-07-21 08:38:01,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:01,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960048174] [2022-07-21 08:38:01,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:01,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:38:01,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960048174] [2022-07-21 08:38:01,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960048174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:01,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:01,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:38:01,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301507706] [2022-07-21 08:38:01,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:01,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:38:01,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:01,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:38:01,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:38:01,547 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 381 out of 450 [2022-07-21 08:38:01,550 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 408 transitions, 851 flow. Second operand has 7 states, 7 states have (on average 383.2857142857143) internal successors, (2683), 7 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:01,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:01,551 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 381 of 450 [2022-07-21 08:38:01,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:38:14,447 INFO L129 PetriNetUnfolder]: 10886/41805 cut-off events. [2022-07-21 08:38:14,448 INFO L130 PetriNetUnfolder]: For 4726/4726 co-relation queries the response was YES. [2022-07-21 08:38:15,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59440 conditions, 41805 events. 10886/41805 cut-off events. For 4726/4726 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 560473 event pairs, 2946 based on Foata normal form. 0/38362 useless extension candidates. Maximal degree in co-relation 59430. Up to 3963 conditions per place. [2022-07-21 08:38:16,019 INFO L132 encePairwiseOnDemand]: 441/450 looper letters, 156 selfloop transitions, 13 changer transitions 0/544 dead transitions. [2022-07-21 08:38:16,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 544 transitions, 1791 flow [2022-07-21 08:38:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 08:38:16,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 08:38:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 5124 transitions. [2022-07-21 08:38:16,030 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8758974358974358 [2022-07-21 08:38:16,030 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 5124 transitions. [2022-07-21 08:38:16,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 5124 transitions. [2022-07-21 08:38:16,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:38:16,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 5124 transitions. [2022-07-21 08:38:16,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 394.15384615384613) internal successors, (5124), 13 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:16,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 450.0) internal successors, (6300), 14 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:16,058 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 450.0) internal successors, (6300), 14 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:16,058 INFO L186 Difference]: Start difference. First operand has 403 places, 408 transitions, 851 flow. Second operand 13 states and 5124 transitions. [2022-07-21 08:38:16,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 544 transitions, 1791 flow [2022-07-21 08:38:16,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 544 transitions, 1791 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:38:16,069 INFO L242 Difference]: Finished difference. Result has 412 places, 410 transitions, 881 flow [2022-07-21 08:38:16,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=881, PETRI_PLACES=412, PETRI_TRANSITIONS=410} [2022-07-21 08:38:16,072 INFO L279 CegarLoopForPetriNet]: 415 programPoint places, -3 predicate places. [2022-07-21 08:38:16,072 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 410 transitions, 881 flow [2022-07-21 08:38:16,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 383.2857142857143) internal successors, (2683), 7 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:16,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:16,073 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:38:16,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:38:16,074 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-07-21 08:38:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash 940321544, now seen corresponding path program 1 times [2022-07-21 08:38:16,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:16,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585114541] [2022-07-21 08:38:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:16,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:38:16,236 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:38:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:38:16,257 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:38:16,258 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:38:16,258 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-07-21 08:38:16,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-07-21 08:38:16,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-07-21 08:38:16,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-07-21 08:38:16,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-07-21 08:38:16,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-07-21 08:38:16,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-07-21 08:38:16,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-07-21 08:38:16,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-07-21 08:38:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:38:16,260 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:38:16,261 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:38:16,261 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-21 08:38:16,322 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:38:16,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 470 places, 510 transitions, 1116 flow [2022-07-21 08:38:16,488 INFO L129 PetriNetUnfolder]: 65/612 cut-off events. [2022-07-21 08:38:16,488 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-21 08:38:16,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 612 events. 65/612 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2564 event pairs, 0 based on Foata normal form. 0/530 useless extension candidates. Maximal degree in co-relation 575. Up to 18 conditions per place. [2022-07-21 08:38:16,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 470 places, 510 transitions, 1116 flow [2022-07-21 08:38:16,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 470 places, 510 transitions, 1116 flow [2022-07-21 08:38:16,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:38:16,525 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@53b34110, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@726735aa [2022-07-21 08:38:16,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-21 08:38:16,533 INFO L129 PetriNetUnfolder]: 6/112 cut-off events. [2022-07-21 08:38:16,533 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:38:16,533 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:16,534 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:38:16,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-21 08:38:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:16,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1804794228, now seen corresponding path program 1 times [2022-07-21 08:38:16,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:16,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731756390] [2022-07-21 08:38:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:16,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:38:16,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:16,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731756390] [2022-07-21 08:38:16,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731756390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:16,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:16,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:38:16,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137285607] [2022-07-21 08:38:16,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:16,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:38:16,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:16,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:38:16,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:38:16,555 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 452 out of 510 [2022-07-21 08:38:16,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 510 transitions, 1116 flow. Second operand has 2 states, 2 states have (on average 453.0) internal successors, (906), 2 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:16,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:16,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 452 of 510 [2022-07-21 08:38:16,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:38:21,858 INFO L129 PetriNetUnfolder]: 2303/17241 cut-off events. [2022-07-21 08:38:21,858 INFO L130 PetriNetUnfolder]: For 11007/11007 co-relation queries the response was YES. [2022-07-21 08:38:22,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22371 conditions, 17241 events. 2303/17241 cut-off events. For 11007/11007 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 202938 event pairs, 1538 based on Foata normal form. 5383/21368 useless extension candidates. Maximal degree in co-relation 10890. Up to 2049 conditions per place. [2022-07-21 08:38:22,406 INFO L132 encePairwiseOnDemand]: 476/510 looper letters, 16 selfloop transitions, 0 changer transitions 0/463 dead transitions. [2022-07-21 08:38:22,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 463 transitions, 1054 flow [2022-07-21 08:38:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:38:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:38:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 954 transitions. [2022-07-21 08:38:22,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9352941176470588 [2022-07-21 08:38:22,409 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 954 transitions. [2022-07-21 08:38:22,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 954 transitions. [2022-07-21 08:38:22,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:38:22,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 954 transitions. [2022-07-21 08:38:22,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 477.0) internal successors, (954), 2 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 510.0) internal successors, (1530), 3 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,414 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 510.0) internal successors, (1530), 3 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,414 INFO L186 Difference]: Start difference. First operand has 470 places, 510 transitions, 1116 flow. Second operand 2 states and 954 transitions. [2022-07-21 08:38:22,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 463 transitions, 1054 flow [2022-07-21 08:38:22,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 463 transitions, 998 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-07-21 08:38:22,435 INFO L242 Difference]: Finished difference. Result has 457 places, 463 transitions, 966 flow [2022-07-21 08:38:22,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=966, PETRI_PLACES=457, PETRI_TRANSITIONS=463} [2022-07-21 08:38:22,436 INFO L279 CegarLoopForPetriNet]: 470 programPoint places, -13 predicate places. [2022-07-21 08:38:22,436 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 463 transitions, 966 flow [2022-07-21 08:38:22,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 453.0) internal successors, (906), 2 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:38:22,437 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:38:22,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 08:38:22,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-21 08:38:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:38:22,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1044237717, now seen corresponding path program 1 times [2022-07-21 08:38:22,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:38:22,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940665646] [2022-07-21 08:38:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:38:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:38:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:38:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:38:22,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:38:22,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940665646] [2022-07-21 08:38:22,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940665646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:38:22,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:38:22,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:38:22,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310898394] [2022-07-21 08:38:22,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:38:22,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:38:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:38:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:38:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:38:22,500 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 438 out of 510 [2022-07-21 08:38:22,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 463 transitions, 966 flow. Second operand has 6 states, 6 states have (on average 440.1666666666667) internal successors, (2641), 6 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:38:22,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:38:22,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 438 of 510 [2022-07-21 08:38:22,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand