./Ultimate.py --spec /storage/repos/ultimate/trunk/examples/svcomp/properties/no-data-race.prp --file /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c --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/weaver/array-eq-trans.wvr.c -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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-efd9311-m [2022-04-18 20:14:59,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-18 20:14:59,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-18 20:14:59,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-18 20:14:59,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-18 20:14:59,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-18 20:14:59,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-18 20:14:59,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-18 20:14:59,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-18 20:14:59,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-18 20:14:59,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-18 20:14:59,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-18 20:14:59,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-18 20:14:59,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-18 20:14:59,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-18 20:14:59,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-18 20:14:59,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-18 20:14:59,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-18 20:14:59,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-18 20:14:59,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-18 20:14:59,541 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-18 20:14:59,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-18 20:14:59,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-18 20:14:59,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-18 20:14:59,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-18 20:14:59,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-18 20:14:59,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-18 20:14:59,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-18 20:14:59,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-18 20:14:59,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-18 20:14:59,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-18 20:14:59,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-18 20:14:59,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-18 20:14:59,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-18 20:14:59,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-18 20:14:59,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-18 20:14:59,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-18 20:14:59,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-18 20:14:59,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-18 20:14:59,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-18 20:14:59,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-18 20:14:59,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-18 20:14:59,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-DataRace-32bit-Taipan_Default.epf [2022-04-18 20:14:59,584 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-18 20:14:59,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-18 20:14:59,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-18 20:14:59,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-18 20:14:59,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-18 20:14:59,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-18 20:14:59,586 INFO L138 SettingsManager]: * User list type=DISABLED [2022-04-18 20:14:59,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-04-18 20:14:59,586 INFO L138 SettingsManager]: * Explicit value domain=true [2022-04-18 20:14:59,587 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-04-18 20:14:59,587 INFO L138 SettingsManager]: * Octagon Domain=false [2022-04-18 20:14:59,587 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-04-18 20:14:59,588 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-04-18 20:14:59,588 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-04-18 20:14:59,588 INFO L138 SettingsManager]: * Interval Domain=false [2022-04-18 20:14:59,588 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-04-18 20:14:59,588 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-04-18 20:14:59,588 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-04-18 20:14:59,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-18 20:14:59,589 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-18 20:14:59,589 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-04-18 20:14:59,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-18 20:14:59,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-18 20:14:59,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-18 20:14:59,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-18 20:14:59,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-18 20:14:59,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-18 20:14:59,590 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-04-18 20:14:59,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-18 20:14:59,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-18 20:14:59,591 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-18 20:14:59,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-18 20:14:59,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-18 20:14:59,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-18 20:14:59,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-18 20:14:59,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-18 20:14:59,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-18 20:14:59,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-18 20:14:59,592 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-04-18 20:14:59,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-18 20:14:59,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-18 20:14:59,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-18 20:14:59,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-18 20:14:59,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-04-18 20:14:59,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-18 20:14:59,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-18 20:14:59,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-18 20:14:59,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-18 20:14:59,824 INFO L275 PluginConnector]: CDTParser initialized [2022-04-18 20:14:59,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2022-04-18 20:14:59,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/aad630099/f6547a01b4c14c1bb75a405512e74c7c/FLAG6e378ed9e [2022-04-18 20:15:00,236 INFO L306 CDTParser]: Found 1 translation units. [2022-04-18 20:15:00,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2022-04-18 20:15:00,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/aad630099/f6547a01b4c14c1bb75a405512e74c7c/FLAG6e378ed9e [2022-04-18 20:15:00,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/aad630099/f6547a01b4c14c1bb75a405512e74c7c [2022-04-18 20:15:00,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-18 20:15:00,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-04-18 20:15:00,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-18 20:15:00,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-18 20:15:00,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-18 20:15:00,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e45d925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00, skipping insertion in model container [2022-04-18 20:15:00,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-18 20:15:00,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-18 20:15:00,436 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c[2737,2750] [2022-04-18 20:15:00,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-18 20:15:00,451 INFO L203 MainTranslator]: Completed pre-run [2022-04-18 20:15:00,480 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c[2737,2750] [2022-04-18 20:15:00,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-18 20:15:00,491 INFO L208 MainTranslator]: Completed translation [2022-04-18 20:15:00,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00 WrapperNode [2022-04-18 20:15:00,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-18 20:15:00,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-04-18 20:15:00,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-04-18 20:15:00,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-04-18 20:15:00,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,548 INFO L137 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 348 [2022-04-18 20:15:00,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-04-18 20:15:00,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-18 20:15:00,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-18 20:15:00,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-18 20:15:00,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-18 20:15:00,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-18 20:15:00,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-18 20:15:00,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-18 20:15:00,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (1/1) ... [2022-04-18 20:15:00,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-18 20:15:00,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 [2022-04-18 20:15:00,647 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 20:15:00,666 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 20:15:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-18 20:15:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-04-18 20:15:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-04-18 20:15:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-04-18 20:15:00,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-04-18 20:15:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-04-18 20:15:00,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-04-18 20:15:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-18 20:15:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-18 20:15:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-18 20:15:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-04-18 20:15:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-18 20:15:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-18 20:15:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-18 20:15:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-18 20:15:00,680 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 20:15:00,775 INFO L234 CfgBuilder]: Building ICFG [2022-04-18 20:15:00,776 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-18 20:15:01,341 INFO L275 CfgBuilder]: Performing block encoding [2022-04-18 20:15:01,355 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-18 20:15:01,357 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-18 20:15:01,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 08:15:01 BoogieIcfgContainer [2022-04-18 20:15:01,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-18 20:15:01,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-18 20:15:01,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-18 20:15:01,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-18 20:15:01,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 08:15:00" (1/3) ... [2022-04-18 20:15:01,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee97b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 08:15:01, skipping insertion in model container [2022-04-18 20:15:01,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:15:00" (2/3) ... [2022-04-18 20:15:01,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee97b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 08:15:01, skipping insertion in model container [2022-04-18 20:15:01,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 08:15:01" (3/3) ... [2022-04-18 20:15:01,367 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2022-04-18 20:15:01,371 WARN L147 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-04-18 20:15:01,371 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-18 20:15:01,371 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 81 error locations. [2022-04-18 20:15:01,371 INFO L504 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-04-18 20:15:01,475 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-04-18 20:15:01,521 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-18 20:15:01,528 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 20:15:01,529 INFO L341 AbstractCegarLoop]: Starting to check reachability of 120 error locations. [2022-04-18 20:15:01,549 INFO L116 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-04-18 20:15:01,558 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 621 places, 644 transitions, 1312 flow [2022-04-18 20:15:01,563 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 621 places, 644 transitions, 1312 flow [2022-04-18 20:15:01,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 621 places, 644 transitions, 1312 flow [2022-04-18 20:15:01,738 INFO L129 PetriNetUnfolder]: 33/641 cut-off events. [2022-04-18 20:15:01,738 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-04-18 20:15:01,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 641 events. 33/641 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1326 event pairs, 0 based on Foata normal form. 0/527 useless extension candidates. Maximal degree in co-relation 364. Up to 3 conditions per place. [2022-04-18 20:15:01,759 INFO L116 LiptonReduction]: Number of co-enabled transitions 35640 [2022-04-18 20:15:44,629 WARN L232 SmtUtils]: Spent 13.48s on a formula simplification. DAG size of input: 170 DAG size of output: 168 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-18 20:15:51,468 WARN L232 SmtUtils]: Spent 6.84s on a formula simplification that was a NOOP. DAG size: 167 (called from [L 316] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-18 20:15:51,987 INFO L131 LiptonReduction]: Checked pairs total: 221665 [2022-04-18 20:15:51,988 INFO L133 LiptonReduction]: Total number of compositions: 929 [2022-04-18 20:15:51,997 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 168 places, 173 transitions, 370 flow [2022-04-18 20:15:56,159 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 166407 states, 161790 states have (on average 4.247611100809691) internal successors, (687221), 166406 states have internal predecessors, (687221), 0 states have call successors, (0), 0 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 20:15:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 166407 states, 161790 states have (on average 4.247611100809691) internal successors, (687221), 166406 states have internal predecessors, (687221), 0 states have call successors, (0), 0 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 20:15:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-04-18 20:15:56,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:15:56,636 INFO L499 BasicCegarLoop]: trace histogram [1] [2022-04-18 20:15:56,636 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:15:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:15:56,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2434, now seen corresponding path program 1 times [2022-04-18 20:15:56,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:15:56,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902237568] [2022-04-18 20:15:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:15:56,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:15:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:15:56,720 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 20:15:56,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:15:56,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902237568] [2022-04-18 20:15:56,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902237568] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:15:56,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:15:56,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-04-18 20:15:56,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177890645] [2022-04-18 20:15:56,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:15:56,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-18 20:15:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:15:56,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-18 20:15:56,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-18 20:15:57,097 INFO L87 Difference]: Start difference. First operand has 166407 states, 161790 states have (on average 4.247611100809691) internal successors, (687221), 166406 states have internal predecessors, (687221), 0 states have call successors, (0), 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 20:15:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 20:15:57,907 INFO L93 Difference]: Finished difference Result 46105 states and 189743 transitions. [2022-04-18 20:15:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-18 20:15:57,909 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 20:15:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 20:15:58,454 INFO L225 Difference]: With dead ends: 46105 [2022-04-18 20:15:58,454 INFO L226 Difference]: Without dead ends: 46102 [2022-04-18 20:15:58,455 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 20:15:58,458 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-18 20:15:58,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-18 20:15:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46102 states. [2022-04-18 20:15:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46102 to 46102. [2022-04-18 20:15:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46102 states, 46037 states have (on average 4.121380628624801) internal successors, (189736), 46101 states have internal predecessors, (189736), 0 states have call successors, (0), 0 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 20:16:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46102 states to 46102 states and 189736 transitions. [2022-04-18 20:16:00,437 INFO L78 Accepts]: Start accepts. Automaton has 46102 states and 189736 transitions. Word has length 1 [2022-04-18 20:16:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 20:16:00,437 INFO L478 AbstractCegarLoop]: Abstraction has 46102 states and 189736 transitions. [2022-04-18 20:16:00,437 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 20:16:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 46102 states and 189736 transitions. [2022-04-18 20:16:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-18 20:16:00,439 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:16:00,439 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 20:16:00,440 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-18 20:16:00,440 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:16:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:16:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1032342094, now seen corresponding path program 1 times [2022-04-18 20:16:00,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:16:00,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904393482] [2022-04-18 20:16:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:16:00,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:16:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:16:00,578 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 20:16:00,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:16:00,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904393482] [2022-04-18 20:16:00,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904393482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:16:00,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:16:00,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-18 20:16:00,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93941864] [2022-04-18 20:16:00,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:16:00,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-18 20:16:00,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:16:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-18 20:16:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-18 20:16:00,581 INFO L87 Difference]: Start difference. First operand 46102 states and 189736 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 20:16:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 20:16:01,516 INFO L93 Difference]: Finished difference Result 39965 states and 163174 transitions. [2022-04-18 20:16:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-18 20:16:01,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-04-18 20:16:01,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 20:16:01,739 INFO L225 Difference]: With dead ends: 39965 [2022-04-18 20:16:01,740 INFO L226 Difference]: Without dead ends: 39965 [2022-04-18 20:16:01,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-18 20:16:01,742 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 103 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-18 20:16:01,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 22 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-18 20:16:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39965 states. [2022-04-18 20:16:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39965 to 39965. [2022-04-18 20:16:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39965 states, 39927 states have (on average 4.0868084253763115) internal successors, (163174), 39964 states have internal predecessors, (163174), 0 states have call successors, (0), 0 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 20:16:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39965 states to 39965 states and 163174 transitions. [2022-04-18 20:16:03,081 INFO L78 Accepts]: Start accepts. Automaton has 39965 states and 163174 transitions. Word has length 13 [2022-04-18 20:16:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 20:16:03,082 INFO L478 AbstractCegarLoop]: Abstraction has 39965 states and 163174 transitions. [2022-04-18 20:16:03,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 20:16:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 39965 states and 163174 transitions. [2022-04-18 20:16:03,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-18 20:16:03,084 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:16:03,084 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 20:16:03,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-18 20:16:03,085 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err6ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:16:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:16:03,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1945554386, now seen corresponding path program 1 times [2022-04-18 20:16:03,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:16:03,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15600776] [2022-04-18 20:16:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:16:03,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:16:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:16:03,127 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 20:16:03,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:16:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15600776] [2022-04-18 20:16:03,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15600776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:16:03,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:16:03,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-18 20:16:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056228801] [2022-04-18 20:16:03,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:16:03,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 20:16:03,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:16:03,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 20:16:03,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 20:16:03,130 INFO L87 Difference]: Start difference. First operand 39965 states and 163174 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 20:16:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 20:16:03,750 INFO L93 Difference]: Finished difference Result 41943 states and 171157 transitions. [2022-04-18 20:16:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 20:16:03,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-04-18 20:16:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 20:16:03,938 INFO L225 Difference]: With dead ends: 41943 [2022-04-18 20:16:03,938 INFO L226 Difference]: Without dead ends: 41943 [2022-04-18 20:16:03,939 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 20:16:03,940 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 49 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-18 20:16:03,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 86 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-18 20:16:04,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41943 states. [2022-04-18 20:16:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41943 to 41943. [2022-04-18 20:16:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41943 states, 41905 states have (on average 4.084405202243169) internal successors, (171157), 41942 states have internal predecessors, (171157), 0 states have call successors, (0), 0 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 20:16:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41943 states to 41943 states and 171157 transitions. [2022-04-18 20:16:05,542 INFO L78 Accepts]: Start accepts. Automaton has 41943 states and 171157 transitions. Word has length 13 [2022-04-18 20:16:05,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 20:16:05,542 INFO L478 AbstractCegarLoop]: Abstraction has 41943 states and 171157 transitions. [2022-04-18 20:16:05,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 20:16:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 41943 states and 171157 transitions. [2022-04-18 20:16:05,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-18 20:16:05,559 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:16:05,559 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 20:16:05,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-18 20:16:05,560 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err6ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:16:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:16:05,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1734632852, now seen corresponding path program 1 times [2022-04-18 20:16:05,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:16:05,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328146081] [2022-04-18 20:16:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:16:05,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:16:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:16:05,672 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 20:16:05,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:16:05,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328146081] [2022-04-18 20:16:05,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328146081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:16:05,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:16:05,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-18 20:16:05,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521363760] [2022-04-18 20:16:05,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:16:05,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-18 20:16:05,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:16:05,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-18 20:16:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-18 20:16:05,677 INFO L87 Difference]: Start difference. First operand 41943 states and 171157 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 20:16:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 20:16:06,307 INFO L93 Difference]: Finished difference Result 44321 states and 176712 transitions. [2022-04-18 20:16:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-18 20:16:06,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-04-18 20:16:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 20:16:06,487 INFO L225 Difference]: With dead ends: 44321 [2022-04-18 20:16:06,488 INFO L226 Difference]: Without dead ends: 44321 [2022-04-18 20:16:06,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-18 20:16:06,490 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-18 20:16:06,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 27 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-18 20:16:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44321 states. [2022-04-18 20:16:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44321 to 39965. [2022-04-18 20:16:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39965 states, 39936 states have (on average 4.085887419871795) internal successors, (163174), 39964 states have internal predecessors, (163174), 0 states have call successors, (0), 0 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 20:16:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39965 states to 39965 states and 163174 transitions. [2022-04-18 20:16:07,964 INFO L78 Accepts]: Start accepts. Automaton has 39965 states and 163174 transitions. Word has length 14 [2022-04-18 20:16:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 20:16:07,964 INFO L478 AbstractCegarLoop]: Abstraction has 39965 states and 163174 transitions. [2022-04-18 20:16:07,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 20:16:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 39965 states and 163174 transitions. [2022-04-18 20:16:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-18 20:16:07,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:16:07,967 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 20:16:07,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-18 20:16:07,968 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err6ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:16:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:16:07,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1685054921, now seen corresponding path program 1 times [2022-04-18 20:16:07,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:16:07,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885223859] [2022-04-18 20:16:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:16:07,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:16:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:16:08,000 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 20:16:08,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:16:08,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885223859] [2022-04-18 20:16:08,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885223859] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:16:08,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:16:08,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-18 20:16:08,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236958015] [2022-04-18 20:16:08,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:16:08,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 20:16:08,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:16:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 20:16:08,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 20:16:08,002 INFO L87 Difference]: Start difference. First operand 39965 states and 163174 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 20:16:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 20:16:08,686 INFO L93 Difference]: Finished difference Result 42060 states and 171524 transitions. [2022-04-18 20:16:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 20:16:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-04-18 20:16:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 20:16:08,886 INFO L225 Difference]: With dead ends: 42060 [2022-04-18 20:16:08,886 INFO L226 Difference]: Without dead ends: 42060 [2022-04-18 20:16:08,886 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 20:16:08,887 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 53 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-18 20:16:08,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 90 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-18 20:16:08,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42060 states. [2022-04-18 20:16:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42060 to 42060. [2022-04-18 20:16:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42060 states, 42031 states have (on average 4.080892674454569) internal successors, (171524), 42059 states have internal predecessors, (171524), 0 states have call successors, (0), 0 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 20:16:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42060 states to 42060 states and 171524 transitions. [2022-04-18 20:16:10,239 INFO L78 Accepts]: Start accepts. Automaton has 42060 states and 171524 transitions. Word has length 15 [2022-04-18 20:16:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 20:16:10,239 INFO L478 AbstractCegarLoop]: Abstraction has 42060 states and 171524 transitions. [2022-04-18 20:16:10,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 20:16:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 42060 states and 171524 transitions. [2022-04-18 20:16:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-18 20:16:10,243 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:16:10,243 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 20:16:10,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-18 20:16:10,243 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err6ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:16:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:16:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2069870037, now seen corresponding path program 1 times [2022-04-18 20:16:10,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:16:10,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600856436] [2022-04-18 20:16:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:16:10,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:16:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:16:10,299 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 20:16:10,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:16:10,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600856436] [2022-04-18 20:16:10,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600856436] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:16:10,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:16:10,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-18 20:16:10,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735704445] [2022-04-18 20:16:10,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:16:10,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 20:16:10,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:16:10,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 20:16:10,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 20:16:10,301 INFO L87 Difference]: Start difference. First operand 42060 states and 171524 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 20:16:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 20:16:11,036 INFO L93 Difference]: Finished difference Result 44487 states and 181178 transitions. [2022-04-18 20:16:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 20:16:11,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-04-18 20:16:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 20:16:11,240 INFO L225 Difference]: With dead ends: 44487 [2022-04-18 20:16:11,240 INFO L226 Difference]: Without dead ends: 44485 [2022-04-18 20:16:11,241 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 20:16:11,241 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 60 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-18 20:16:11,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 96 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-18 20:16:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44485 states. [2022-04-18 20:16:12,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44485 to 44485. [2022-04-18 20:16:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44485 states, 44456 states have (on average 4.075355407594025) internal successors, (181174), 44484 states have internal predecessors, (181174), 0 states have call successors, (0), 0 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 20:16:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44485 states to 44485 states and 181174 transitions. [2022-04-18 20:16:12,737 INFO L78 Accepts]: Start accepts. Automaton has 44485 states and 181174 transitions. Word has length 16 [2022-04-18 20:16:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 20:16:12,738 INFO L478 AbstractCegarLoop]: Abstraction has 44485 states and 181174 transitions. [2022-04-18 20:16:12,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 20:16:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 44485 states and 181174 transitions. [2022-04-18 20:16:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-18 20:16:12,741 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:16:12,741 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 20:16:12,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-18 20:16:12,742 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err6ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:16:12,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:16:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash -966916587, now seen corresponding path program 1 times [2022-04-18 20:16:12,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:16:12,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627081932] [2022-04-18 20:16:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:16:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:16:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:16:12,829 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 20:16:12,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:16:12,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627081932] [2022-04-18 20:16:12,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627081932] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:16:12,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:16:12,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-18 20:16:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486726769] [2022-04-18 20:16:12,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:16:12,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-18 20:16:12,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:16:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-18 20:16:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-18 20:16:12,831 INFO L87 Difference]: Start difference. First operand 44485 states and 181174 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 20:16:14,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 20:16:14,187 INFO L93 Difference]: Finished difference Result 104764 states and 420244 transitions. [2022-04-18 20:16:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-18 20:16:14,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-04-18 20:16:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 20:16:14,752 INFO L225 Difference]: With dead ends: 104764 [2022-04-18 20:16:14,752 INFO L226 Difference]: Without dead ends: 104764 [2022-04-18 20:16:14,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-04-18 20:16:14,753 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 416 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-18 20:16:14,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 104 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-18 20:16:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104764 states. [2022-04-18 20:16:16,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104764 to 48958. [2022-04-18 20:16:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48958 states, 48929 states have (on average 4.0650534447873445) internal successors, (198899), 48957 states have internal predecessors, (198899), 0 states have call successors, (0), 0 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 20:16:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48958 states to 48958 states and 198899 transitions. [2022-04-18 20:16:17,332 INFO L78 Accepts]: Start accepts. Automaton has 48958 states and 198899 transitions. Word has length 16 [2022-04-18 20:16:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 20:16:17,333 INFO L478 AbstractCegarLoop]: Abstraction has 48958 states and 198899 transitions. [2022-04-18 20:16:17,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 20:16:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 48958 states and 198899 transitions. [2022-04-18 20:16:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-18 20:16:17,337 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:16:17,338 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 20:16:17,338 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-18 20:16:17,338 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err6ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:16:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:16:17,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1947910696, now seen corresponding path program 1 times [2022-04-18 20:16:17,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:16:17,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355227684] [2022-04-18 20:16:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:16:17,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:16:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:16:17,413 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 20:16:17,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:16:17,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355227684] [2022-04-18 20:16:17,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355227684] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:16:17,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:16:17,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-18 20:16:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183505992] [2022-04-18 20:16:17,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:16:17,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-18 20:16:17,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:16:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-18 20:16:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-18 20:16:17,415 INFO L87 Difference]: Start difference. First operand 48958 states and 198899 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 20:16:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 20:16:17,898 INFO L93 Difference]: Finished difference Result 60549 states and 241450 transitions. [2022-04-18 20:16:17,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-18 20:16:17,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-04-18 20:16:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 20:16:18,167 INFO L225 Difference]: With dead ends: 60549 [2022-04-18 20:16:18,167 INFO L226 Difference]: Without dead ends: 60545 [2022-04-18 20:16:18,167 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-18 20:16:18,168 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-18 20:16:18,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 90 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-18 20:16:18,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60545 states. [2022-04-18 20:16:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60545 to 55211. [2022-04-18 20:16:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55211 states, 55182 states have (on average 4.039849951071002) internal successors, (222927), 55210 states have internal predecessors, (222927), 0 states have call successors, (0), 0 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 20:16:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55211 states to 55211 states and 222927 transitions. [2022-04-18 20:16:20,557 INFO L78 Accepts]: Start accepts. Automaton has 55211 states and 222927 transitions. Word has length 17 [2022-04-18 20:16:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 20:16:20,558 INFO L478 AbstractCegarLoop]: Abstraction has 55211 states and 222927 transitions. [2022-04-18 20:16:20,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 20:16:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 55211 states and 222927 transitions. [2022-04-18 20:16:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-18 20:16:20,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:16:20,563 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 20:16:20,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-18 20:16:20,563 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err6ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:16:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:16:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1101833981, now seen corresponding path program 1 times [2022-04-18 20:16:20,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:16:20,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319361409] [2022-04-18 20:16:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:16:20,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:16:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:16:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-18 20:16:20,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:16:20,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319361409] [2022-04-18 20:16:20,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319361409] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:16:20,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:16:20,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-18 20:16:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132079076] [2022-04-18 20:16:20,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:16:20,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-18 20:16:20,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:16:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-18 20:16:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-18 20:16:20,622 INFO L87 Difference]: Start difference. First operand 55211 states and 222927 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 20:16:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 20:16:22,239 INFO L93 Difference]: Finished difference Result 125523 states and 505383 transitions. [2022-04-18 20:16:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-18 20:16:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-04-18 20:16:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 20:16:22,984 INFO L225 Difference]: With dead ends: 125523 [2022-04-18 20:16:22,984 INFO L226 Difference]: Without dead ends: 125523 [2022-04-18 20:16:22,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-04-18 20:16:22,985 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 391 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-18 20:16:22,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 196 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-18 20:16:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125523 states. [2022-04-18 20:16:25,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125523 to 62779. [2022-04-18 20:16:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62779 states, 62750 states have (on average 4.067298804780877) internal successors, (255223), 62778 states have internal predecessors, (255223), 0 states have call successors, (0), 0 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 20:16:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62779 states to 62779 states and 255223 transitions. [2022-04-18 20:16:25,943 INFO L78 Accepts]: Start accepts. Automaton has 62779 states and 255223 transitions. Word has length 17 [2022-04-18 20:16:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 20:16:25,943 INFO L478 AbstractCegarLoop]: Abstraction has 62779 states and 255223 transitions. [2022-04-18 20:16:25,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 20:16:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 62779 states and 255223 transitions. [2022-04-18 20:16:25,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-18 20:16:25,957 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:16:25,957 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 20:16:25,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-18 20:16:25,957 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err6ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:16:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:16:25,958 INFO L85 PathProgramCache]: Analyzing trace with hash 648890791, now seen corresponding path program 1 times [2022-04-18 20:16:25,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:16:25,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852409207] [2022-04-18 20:16:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:16:25,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:16:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:16:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-18 20:16:26,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:16:26,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852409207] [2022-04-18 20:16:26,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852409207] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:16:26,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:16:26,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-18 20:16:26,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167566590] [2022-04-18 20:16:26,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:16:26,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-18 20:16:26,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:16:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-18 20:16:26,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-18 20:16:26,033 INFO L87 Difference]: Start difference. First operand 62779 states and 255223 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 20:16:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 20:16:26,847 INFO L93 Difference]: Finished difference Result 62911 states and 253001 transitions. [2022-04-18 20:16:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-18 20:16:26,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-04-18 20:16:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 20:16:27,657 INFO L225 Difference]: With dead ends: 62911 [2022-04-18 20:16:27,658 INFO L226 Difference]: Without dead ends: 62911 [2022-04-18 20:16:27,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-18 20:16:27,658 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 85 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-18 20:16:27,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 27 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-18 20:16:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62911 states. [2022-04-18 20:16:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62911 to 60283. [2022-04-18 20:16:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60283 states, 60263 states have (on average 4.071237741234256) internal successors, (245345), 60282 states have internal predecessors, (245345), 0 states have call successors, (0), 0 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 20:16:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60283 states to 60283 states and 245345 transitions. [2022-04-18 20:16:29,479 INFO L78 Accepts]: Start accepts. Automaton has 60283 states and 245345 transitions. Word has length 18 [2022-04-18 20:16:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 20:16:29,479 INFO L478 AbstractCegarLoop]: Abstraction has 60283 states and 245345 transitions. [2022-04-18 20:16:29,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 20:16:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 60283 states and 245345 transitions. [2022-04-18 20:16:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-18 20:16:29,487 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 20:16:29,487 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 20:16:29,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-18 20:16:29,487 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err6ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 116 more)] === [2022-04-18 20:16:29,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 20:16:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash 855645824, now seen corresponding path program 1 times [2022-04-18 20:16:29,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 20:16:29,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352731719] [2022-04-18 20:16:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 20:16:29,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 20:16:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 20:16:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-18 20:16:29,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 20:16:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352731719] [2022-04-18 20:16:29,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352731719] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 20:16:29,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 20:16:29,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-18 20:16:29,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384275926] [2022-04-18 20:16:29,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 20:16:29,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-18 20:16:29,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 20:16:29,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-18 20:16:29,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-18 20:16:29,540 INFO L87 Difference]: Start difference. First operand 60283 states and 245345 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)