./Ultimate.py --spec /storage/repos/ultimate/trunk/examples/svcomp/properties/no-data-race.prp --file /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version efd9311c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-efd9311-m [2022-04-18 19:02:14,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-18 19:02:14,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-18 19:02:14,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-18 19:02:14,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-18 19:02:14,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-18 19:02:14,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-18 19:02:14,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-18 19:02:14,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-18 19:02:14,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-18 19:02:14,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-18 19:02:14,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-18 19:02:14,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-18 19:02:14,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-18 19:02:14,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-18 19:02:14,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-18 19:02:14,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-18 19:02:14,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-18 19:02:14,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-18 19:02:14,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-18 19:02:14,691 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-18 19:02:14,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-18 19:02:14,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-18 19:02:14,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-18 19:02:14,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-18 19:02:14,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-18 19:02:14,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-18 19:02:14,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-18 19:02:14,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-18 19:02:14,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-18 19:02:14,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-18 19:02:14,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-18 19:02:14,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-18 19:02:14,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-18 19:02:14,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-18 19:02:14,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-18 19:02:14,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-18 19:02:14,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-18 19:02:14,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-18 19:02:14,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-18 19:02:14,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-18 19:02:14,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-18 19:02:14,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-DataRace-32bit-Taipan_Default.epf [2022-04-18 19:02:14,729 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-18 19:02:14,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-18 19:02:14,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-18 19:02:14,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-18 19:02:14,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-18 19:02:14,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-18 19:02:14,731 INFO L138 SettingsManager]: * User list type=DISABLED [2022-04-18 19:02:14,731 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-04-18 19:02:14,731 INFO L138 SettingsManager]: * Explicit value domain=true [2022-04-18 19:02:14,732 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-04-18 19:02:14,732 INFO L138 SettingsManager]: * Octagon Domain=false [2022-04-18 19:02:14,732 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-04-18 19:02:14,732 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-04-18 19:02:14,733 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-04-18 19:02:14,733 INFO L138 SettingsManager]: * Interval Domain=false [2022-04-18 19:02:14,733 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-04-18 19:02:14,733 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-04-18 19:02:14,733 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-04-18 19:02:14,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-18 19:02:14,734 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-18 19:02:14,734 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-04-18 19:02:14,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-18 19:02:14,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-18 19:02:14,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-18 19:02:14,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-18 19:02:14,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-18 19:02:14,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-18 19:02:14,735 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-04-18 19:02:14,735 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-18 19:02:14,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-18 19:02:14,736 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-18 19:02:14,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-18 19:02:14,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-18 19:02:14,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-18 19:02:14,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-18 19:02:14,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-18 19:02:14,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-18 19:02:14,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-18 19:02:14,737 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-04-18 19:02:14,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-18 19:02:14,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-18 19:02:14,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-18 19:02:14,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-18 19:02:14,738 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/UTaipan-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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 [2022-04-18 19:02:14,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-18 19:02:14,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-18 19:02:14,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-18 19:02:14,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-18 19:02:14,970 INFO L275 PluginConnector]: CDTParser initialized [2022-04-18 19:02:14,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i [2022-04-18 19:02:15,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/af80a8f1f/f592b273d3384164bbe9e50a689a4afc/FLAG72e8adb52 [2022-04-18 19:02:15,416 INFO L306 CDTParser]: Found 1 translation units. [2022-04-18 19:02:15,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i [2022-04-18 19:02:15,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/af80a8f1f/f592b273d3384164bbe9e50a689a4afc/FLAG72e8adb52 [2022-04-18 19:02:15,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/af80a8f1f/f592b273d3384164bbe9e50a689a4afc [2022-04-18 19:02:15,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-18 19:02:15,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-04-18 19:02:15,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-18 19:02:15,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-18 19:02:15,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-18 19:02:15,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:02:15" (1/1) ... [2022-04-18 19:02:15,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14401bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:15, skipping insertion in model container [2022-04-18 19:02:15,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:02:15" (1/1) ... [2022-04-18 19:02:15,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-18 19:02:15,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-18 19:02:15,671 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-04-18 19:02:15,922 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39095,39108] [2022-04-18 19:02:15,924 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39180,39193] [2022-04-18 19:02:15,925 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39232,39245] [2022-04-18 19:02:15,966 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49285,49298] [2022-04-18 19:02:15,967 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49334,49347] [2022-04-18 19:02:15,969 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49462,49475] [2022-04-18 19:02:15,980 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49520,49533] [2022-04-18 19:02:15,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-18 19:02:15,997 INFO L203 MainTranslator]: Completed pre-run [2022-04-18 19:02:16,004 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-04-18 19:02:16,032 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39095,39108] [2022-04-18 19:02:16,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39180,39193] [2022-04-18 19:02:16,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39232,39245] [2022-04-18 19:02:16,039 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49285,49298] [2022-04-18 19:02:16,040 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49334,49347] [2022-04-18 19:02:16,042 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49462,49475] [2022-04-18 19:02:16,042 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49520,49533] [2022-04-18 19:02:16,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-18 19:02:16,091 INFO L208 MainTranslator]: Completed translation [2022-04-18 19:02:16,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16 WrapperNode [2022-04-18 19:02:16,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-18 19:02:16,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-04-18 19:02:16,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-04-18 19:02:16,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-04-18 19:02:16,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (1/1) ... [2022-04-18 19:02:16,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (1/1) ... [2022-04-18 19:02:16,154 INFO L137 Inliner]: procedures = 309, calls = 63, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 336 [2022-04-18 19:02:16,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-04-18 19:02:16,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-18 19:02:16,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-18 19:02:16,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-18 19:02:16,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (1/1) ... [2022-04-18 19:02:16,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (1/1) ... [2022-04-18 19:02:16,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (1/1) ... [2022-04-18 19:02:16,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (1/1) ... [2022-04-18 19:02:16,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (1/1) ... [2022-04-18 19:02:16,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (1/1) ... [2022-04-18 19:02:16,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (1/1) ... [2022-04-18 19:02:16,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-18 19:02:16,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-18 19:02:16,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-18 19:02:16,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-18 19:02:16,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (1/1) ... [2022-04-18 19:02:16,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-18 19:02:16,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 [2022-04-18 19:02:16,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-18 19:02:16,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-18 19:02:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-04-18 19:02:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-04-18 19:02:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-04-18 19:02:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-04-18 19:02:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-18 19:02:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-18 19:02:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-18 19:02:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-18 19:02:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-18 19:02:16,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-18 19:02:16,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-18 19:02:16,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-18 19:02:16,317 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-04-18 19:02:16,455 INFO L234 CfgBuilder]: Building ICFG [2022-04-18 19:02:16,461 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-18 19:02:16,928 INFO L275 CfgBuilder]: Performing block encoding [2022-04-18 19:02:16,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-18 19:02:16,935 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-18 19:02:16,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:02:16 BoogieIcfgContainer [2022-04-18 19:02:16,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-18 19:02:16,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-18 19:02:16,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-18 19:02:16,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-18 19:02:16,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 07:02:15" (1/3) ... [2022-04-18 19:02:16,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a19b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:02:16, skipping insertion in model container [2022-04-18 19:02:16,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:02:16" (2/3) ... [2022-04-18 19:02:16,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a19b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:02:16, skipping insertion in model container [2022-04-18 19:02:16,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:02:16" (3/3) ... [2022-04-18 19:02:16,943 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_2w1r-2.i [2022-04-18 19:02:16,947 WARN L147 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-04-18 19:02:16,947 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-18 19:02:16,948 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-04-18 19:02:16,948 INFO L504 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-04-18 19:02:17,052 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-04-18 19:02:17,085 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-18 19:02:17,089 INFO L340 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=FINITE_AUTOMATA, 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 [2022-04-18 19:02:17,091 INFO L341 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2022-04-18 19:02:17,102 INFO L116 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-04-18 19:02:17,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 378 places, 388 transitions, 792 flow [2022-04-18 19:02:17,116 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 378 places, 388 transitions, 792 flow [2022-04-18 19:02:17,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 378 places, 388 transitions, 792 flow [2022-04-18 19:02:17,225 INFO L129 PetriNetUnfolder]: 17/386 cut-off events. [2022-04-18 19:02:17,225 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-04-18 19:02:17,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 386 events. 17/386 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 890 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 321. Up to 2 conditions per place. [2022-04-18 19:02:17,261 INFO L116 LiptonReduction]: Number of co-enabled transitions 64100 [2022-04-18 19:02:29,365 INFO L131 LiptonReduction]: Checked pairs total: 1777265 [2022-04-18 19:02:29,365 INFO L133 LiptonReduction]: Total number of compositions: 271 [2022-04-18 19:02:29,371 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 198 places, 203 transitions, 422 flow [2022-04-18 19:02:33,573 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 184123 states, 183499 states have (on average 3.1537120093297513) internal successors, (578703), 184122 states have internal predecessors, (578703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:02:33,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 184123 states, 183499 states have (on average 3.1537120093297513) internal successors, (578703), 184122 states have internal predecessors, (578703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:02:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-04-18 19:02:33,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 19:02:33,934 INFO L499 BasicCegarLoop]: trace histogram [1] [2022-04-18 19:02:33,934 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [reader_twoErr0ASSERT_VIOLATIONDATA_RACE, reader_twoErr1ASSERT_VIOLATIONDATA_RACE, reader_twoErr2ASSERT_VIOLATIONDATA_RACE (and 41 more)] === [2022-04-18 19:02:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 19:02:33,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1338, now seen corresponding path program 1 times [2022-04-18 19:02:33,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 19:02:33,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990679369] [2022-04-18 19:02:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 19:02:33,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 19:02:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 19:02:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 19:02:34,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 19:02:34,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990679369] [2022-04-18 19:02:34,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990679369] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 19:02:34,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 19:02:34,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-04-18 19:02:34,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764564097] [2022-04-18 19:02:34,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 19:02:34,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-18 19:02:34,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 19:02:34,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-18 19:02:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-18 19:02:34,359 INFO L87 Difference]: Start difference. First operand has 184123 states, 183499 states have (on average 3.1537120093297513) internal successors, (578703), 184122 states have internal predecessors, (578703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:02:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 19:02:36,583 INFO L93 Difference]: Finished difference Result 184121 states and 564122 transitions. [2022-04-18 19:02:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-18 19:02:36,585 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-04-18 19:02:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 19:02:37,796 INFO L225 Difference]: With dead ends: 184121 [2022-04-18 19:02:37,797 INFO L226 Difference]: Without dead ends: 184121 [2022-04-18 19:02:37,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-18 19:02:37,801 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-18 19:02:37,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 146 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-18 19:02:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184121 states. [2022-04-18 19:02:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184121 to 184121. [2022-04-18 19:02:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184121 states, 183499 states have (on average 3.07425108583698) internal successors, (564122), 184120 states have internal predecessors, (564122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:02:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184121 states to 184121 states and 564122 transitions. [2022-04-18 19:02:44,811 INFO L78 Accepts]: Start accepts. Automaton has 184121 states and 564122 transitions. Word has length 1 [2022-04-18 19:02:44,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 19:02:44,812 INFO L478 AbstractCegarLoop]: Abstraction has 184121 states and 564122 transitions. [2022-04-18 19:02:44,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:02:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 184121 states and 564122 transitions. [2022-04-18 19:02:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-18 19:02:44,820 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 19:02:44,833 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 19:02:44,834 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-18 19:02:44,834 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONDATA_RACE === [reader_twoErr0ASSERT_VIOLATIONDATA_RACE, reader_twoErr1ASSERT_VIOLATIONDATA_RACE, reader_twoErr2ASSERT_VIOLATIONDATA_RACE (and 41 more)] === [2022-04-18 19:02:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 19:02:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1539585324, now seen corresponding path program 1 times [2022-04-18 19:02:44,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 19:02:44,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572521314] [2022-04-18 19:02:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 19:02:44,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 19:02:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 19:02:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 19:02:44,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 19:02:44,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572521314] [2022-04-18 19:02:44,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572521314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 19:02:44,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 19:02:44,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-18 19:02:44,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427960225] [2022-04-18 19:02:44,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 19:02:44,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 19:02:44,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 19:02:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 19:02:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 19:02:44,968 INFO L87 Difference]: Start difference. First operand 184121 states and 564122 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:02:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 19:02:47,299 INFO L93 Difference]: Finished difference Result 338921 states and 1039432 transitions. [2022-04-18 19:02:47,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 19:02:47,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-04-18 19:02:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 19:02:49,379 INFO L225 Difference]: With dead ends: 338921 [2022-04-18 19:02:49,380 INFO L226 Difference]: Without dead ends: 338921 [2022-04-18 19:02:49,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 19:02:49,381 INFO L913 BasicCegarLoop]: 245 mSDtfsCounter, 171 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-18 19:02:49,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 391 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-18 19:02:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338921 states. [2022-04-18 19:02:55,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338921 to 187721. [2022-04-18 19:02:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187721 states, 187099 states have (on average 3.073731019406838) internal successors, (575092), 187720 states have internal predecessors, (575092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:02:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187721 states to 187721 states and 575092 transitions. [2022-04-18 19:02:56,637 INFO L78 Accepts]: Start accepts. Automaton has 187721 states and 575092 transitions. Word has length 11 [2022-04-18 19:02:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 19:02:56,638 INFO L478 AbstractCegarLoop]: Abstraction has 187721 states and 575092 transitions. [2022-04-18 19:02:56,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:02:56,643 INFO L276 IsEmpty]: Start isEmpty. Operand 187721 states and 575092 transitions. [2022-04-18 19:02:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-18 19:02:56,651 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 19:02:56,651 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 19:02:56,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-18 19:02:56,651 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting writer_fnErr0ASSERT_VIOLATIONDATA_RACE === [reader_twoErr0ASSERT_VIOLATIONDATA_RACE, reader_twoErr1ASSERT_VIOLATIONDATA_RACE, reader_twoErr2ASSERT_VIOLATIONDATA_RACE (and 41 more)] === [2022-04-18 19:02:56,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 19:02:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash 980909548, now seen corresponding path program 1 times [2022-04-18 19:02:56,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 19:02:56,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164704695] [2022-04-18 19:02:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 19:02:56,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 19:02:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 19:02:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 19:02:56,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 19:02:56,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164704695] [2022-04-18 19:02:56,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164704695] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 19:02:56,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 19:02:56,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-18 19:02:56,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820651452] [2022-04-18 19:02:56,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 19:02:56,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-18 19:02:56,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 19:02:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-18 19:02:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-04-18 19:02:56,880 INFO L87 Difference]: Start difference. First operand 187721 states and 575092 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:03:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 19:03:00,759 INFO L93 Difference]: Finished difference Result 324769 states and 996196 transitions. [2022-04-18 19:03:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-18 19:03:00,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-04-18 19:03:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 19:03:02,416 INFO L225 Difference]: With dead ends: 324769 [2022-04-18 19:03:02,417 INFO L226 Difference]: Without dead ends: 324769 [2022-04-18 19:03:02,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-04-18 19:03:02,418 INFO L913 BasicCegarLoop]: 185 mSDtfsCounter, 302 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-18 19:03:02,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 275 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-18 19:03:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324769 states. [2022-04-18 19:03:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324769 to 237497. [2022-04-18 19:03:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237497 states, 236875 states have (on average 3.0671535620052772) internal successors, (726532), 237496 states have internal predecessors, (726532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:03:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237497 states to 237497 states and 726532 transitions. [2022-04-18 19:03:11,343 INFO L78 Accepts]: Start accepts. Automaton has 237497 states and 726532 transitions. Word has length 12 [2022-04-18 19:03:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 19:03:11,344 INFO L478 AbstractCegarLoop]: Abstraction has 237497 states and 726532 transitions. [2022-04-18 19:03:11,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:03:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 237497 states and 726532 transitions. [2022-04-18 19:03:11,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-18 19:03:11,345 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 19:03:11,345 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 19:03:11,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-18 19:03:11,346 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE === [reader_twoErr0ASSERT_VIOLATIONDATA_RACE, reader_twoErr1ASSERT_VIOLATIONDATA_RACE, reader_twoErr2ASSERT_VIOLATIONDATA_RACE (and 41 more)] === [2022-04-18 19:03:11,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 19:03:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash -900746302, now seen corresponding path program 1 times [2022-04-18 19:03:11,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 19:03:11,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400338044] [2022-04-18 19:03:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 19:03:11,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 19:03:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 19:03:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 19:03:11,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 19:03:11,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400338044] [2022-04-18 19:03:11,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400338044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 19:03:11,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 19:03:11,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-18 19:03:11,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912301311] [2022-04-18 19:03:11,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 19:03:11,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-18 19:03:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 19:03:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-18 19:03:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-04-18 19:03:11,435 INFO L87 Difference]: Start difference. First operand 237497 states and 726532 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-18 19:03:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 19:03:15,639 INFO L93 Difference]: Finished difference Result 384009 states and 1176902 transitions. [2022-04-18 19:03:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-18 19:03:15,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-04-18 19:03:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted.