./Ultimate.py --spec /storage/repos/ultimate/trunk/examples/svcomp/properties/no-data-race.prp --file /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/airline-20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version efd9311c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/airline-20.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 012c46975e61d3a8df350de2a682cb9d47f59406509497c2ea72a562542ce55a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-efd9311-m [2022-04-18 18:49:35,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-18 18:49:35,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-18 18:49:35,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-18 18:49:35,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-18 18:49:35,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-18 18:49:35,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-18 18:49:35,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-18 18:49:35,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-18 18:49:35,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-18 18:49:35,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-18 18:49:35,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-18 18:49:35,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-18 18:49:35,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-18 18:49:35,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-18 18:49:35,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-18 18:49:35,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-18 18:49:35,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-18 18:49:35,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-18 18:49:35,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-18 18:49:35,307 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-18 18:49:35,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-18 18:49:35,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-18 18:49:35,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-18 18:49:35,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-18 18:49:35,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-18 18:49:35,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-18 18:49:35,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-18 18:49:35,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-18 18:49:35,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-18 18:49:35,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-18 18:49:35,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-18 18:49:35,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-18 18:49:35,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-18 18:49:35,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-18 18:49:35,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-18 18:49:35,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-18 18:49:35,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-18 18:49:35,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-18 18:49:35,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-18 18:49:35,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-18 18:49:35,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-18 18:49:35,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-DataRace-32bit-Taipan_Default.epf [2022-04-18 18:49:35,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-18 18:49:35,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-18 18:49:35,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-18 18:49:35,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-18 18:49:35,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-18 18:49:35,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-18 18:49:35,361 INFO L138 SettingsManager]: * User list type=DISABLED [2022-04-18 18:49:35,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-04-18 18:49:35,361 INFO L138 SettingsManager]: * Explicit value domain=true [2022-04-18 18:49:35,362 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-04-18 18:49:35,362 INFO L138 SettingsManager]: * Octagon Domain=false [2022-04-18 18:49:35,362 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-04-18 18:49:35,362 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-04-18 18:49:35,363 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-04-18 18:49:35,363 INFO L138 SettingsManager]: * Interval Domain=false [2022-04-18 18:49:35,363 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-04-18 18:49:35,364 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-04-18 18:49:35,364 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-04-18 18:49:35,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-18 18:49:35,365 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-18 18:49:35,366 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-04-18 18:49:35,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-18 18:49:35,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-18 18:49:35,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-18 18:49:35,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-18 18:49:35,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-18 18:49:35,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-18 18:49:35,367 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-04-18 18:49:35,367 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-18 18:49:35,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-18 18:49:35,367 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-18 18:49:35,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-18 18:49:35,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-18 18:49:35,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-18 18:49:35,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-18 18:49:35,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-18 18:49:35,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-18 18:49:35,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-18 18:49:35,369 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-04-18 18:49:35,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-18 18:49:35,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-18 18:49:35,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-18 18:49:35,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-18 18:49:35,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 012c46975e61d3a8df350de2a682cb9d47f59406509497c2ea72a562542ce55a [2022-04-18 18:49:35,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-18 18:49:35,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-18 18:49:35,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-18 18:49:35,624 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-18 18:49:35,625 INFO L275 PluginConnector]: CDTParser initialized [2022-04-18 18:49:35,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/airline-20.i [2022-04-18 18:49:35,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4768e8fe3/19aca78f19c7452289576a0ffb2f9f53/FLAG125f495b3 [2022-04-18 18:49:36,197 INFO L306 CDTParser]: Found 1 translation units. [2022-04-18 18:49:36,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/airline-20.i [2022-04-18 18:49:36,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4768e8fe3/19aca78f19c7452289576a0ffb2f9f53/FLAG125f495b3 [2022-04-18 18:49:36,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4768e8fe3/19aca78f19c7452289576a0ffb2f9f53 [2022-04-18 18:49:36,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-18 18:49:36,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-04-18 18:49:36,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-18 18:49:36,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-18 18:49:36,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-18 18:49:36,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 06:49:36" (1/1) ... [2022-04-18 18:49:36,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c4df42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:36, skipping insertion in model container [2022-04-18 18:49:36,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 06:49:36" (1/1) ... [2022-04-18 18:49:36,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-18 18:49:36,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-18 18:49:37,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/airline-20.i[32101,32114] [2022-04-18 18:49:37,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-18 18:49:37,112 INFO L203 MainTranslator]: Completed pre-run [2022-04-18 18:49:37,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/airline-20.i[32101,32114] [2022-04-18 18:49:37,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-18 18:49:37,199 INFO L208 MainTranslator]: Completed translation [2022-04-18 18:49:37,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37 WrapperNode [2022-04-18 18:49:37,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-18 18:49:37,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-04-18 18:49:37,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-04-18 18:49:37,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-04-18 18:49:37,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (1/1) ... [2022-04-18 18:49:37,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (1/1) ... [2022-04-18 18:49:37,262 INFO L137 Inliner]: procedures = 162, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-04-18 18:49:37,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-04-18 18:49:37,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-18 18:49:37,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-18 18:49:37,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-18 18:49:37,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (1/1) ... [2022-04-18 18:49:37,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (1/1) ... [2022-04-18 18:49:37,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (1/1) ... [2022-04-18 18:49:37,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (1/1) ... [2022-04-18 18:49:37,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (1/1) ... [2022-04-18 18:49:37,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (1/1) ... [2022-04-18 18:49:37,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (1/1) ... [2022-04-18 18:49:37,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-18 18:49:37,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-18 18:49:37,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-18 18:49:37,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-18 18:49:37,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (1/1) ... [2022-04-18 18:49:37,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-18 18:49:37,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 [2022-04-18 18:49:37,344 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 18:49:37,377 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 18:49:37,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-18 18:49:37,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-18 18:49:37,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-04-18 18:49:37,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-18 18:49:37,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-18 18:49:37,399 INFO L130 BoogieDeclarations]: Found specification of procedure salethread [2022-04-18 18:49:37,400 INFO L138 BoogieDeclarations]: Found implementation of procedure salethread [2022-04-18 18:49:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-18 18:49:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-18 18:49:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-04-18 18:49:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-18 18:49:37,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-18 18:49:37,401 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 18:49:37,555 INFO L234 CfgBuilder]: Building ICFG [2022-04-18 18:49:37,557 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-18 18:49:37,777 INFO L275 CfgBuilder]: Performing block encoding [2022-04-18 18:49:37,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-18 18:49:37,816 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-18 18:49:37,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 06:49:37 BoogieIcfgContainer [2022-04-18 18:49:37,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-18 18:49:37,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-18 18:49:37,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-18 18:49:37,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-18 18:49:37,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 06:49:36" (1/3) ... [2022-04-18 18:49:37,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57972996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 06:49:37, skipping insertion in model container [2022-04-18 18:49:37,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 06:49:37" (2/3) ... [2022-04-18 18:49:37,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57972996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 06:49:37, skipping insertion in model container [2022-04-18 18:49:37,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 06:49:37" (3/3) ... [2022-04-18 18:49:37,827 INFO L111 eAbstractionObserver]: Analyzing ICFG airline-20.i [2022-04-18 18:49:37,831 WARN L147 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-04-18 18:49:37,832 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-18 18:49:37,832 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-04-18 18:49:37,832 INFO L504 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-04-18 18:49:37,885 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-04-18 18:49:37,930 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-18 18:49:37,937 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 18:49:37,937 INFO L341 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-04-18 18:49:37,951 INFO L116 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-04-18 18:49:37,967 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 88 transitions, 184 flow [2022-04-18 18:49:37,970 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 88 transitions, 184 flow [2022-04-18 18:49:37,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 184 flow [2022-04-18 18:49:38,014 INFO L129 PetriNetUnfolder]: 9/119 cut-off events. [2022-04-18 18:49:38,015 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-04-18 18:49:38,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 119 events. 9/119 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 246 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2022-04-18 18:49:38,024 INFO L116 LiptonReduction]: Number of co-enabled transitions 1332 [2022-04-18 18:49:40,299 INFO L131 LiptonReduction]: Checked pairs total: 2028 [2022-04-18 18:49:40,299 INFO L133 LiptonReduction]: Total number of compositions: 109 [2022-04-18 18:49:40,306 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 24 transitions, 56 flow [2022-04-18 18:49:40,326 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 82 states, 51 states have (on average 3.0) internal successors, (153), 81 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 18:49:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 51 states have (on average 3.0) internal successors, (153), 81 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 18:49:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-04-18 18:49:40,332 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:40,333 INFO L499 BasicCegarLoop]: trace histogram [1] [2022-04-18 18:49:40,333 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 11 more)] === [2022-04-18 18:49:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 410, now seen corresponding path program 1 times [2022-04-18 18:49:40,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184285046] [2022-04-18 18:49:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:40,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:40,455 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 18:49:40,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:40,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184285046] [2022-04-18 18:49:40,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184285046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:40,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:40,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-04-18 18:49:40,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606437325] [2022-04-18 18:49:40,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:40,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-18 18:49:40,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:40,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-18 18:49:40,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-18 18:49:40,485 INFO L87 Difference]: Start difference. First operand has 82 states, 51 states have (on average 3.0) internal successors, (153), 81 states have internal predecessors, (153), 0 states have call successors, (0), 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 18:49:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:40,517 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2022-04-18 18:49:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-18 18:49:40,520 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 18:49:40,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:40,526 INFO L225 Difference]: With dead ends: 31 [2022-04-18 18:49:40,526 INFO L226 Difference]: Without dead ends: 15 [2022-04-18 18:49:40,527 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 18:49:40,531 INFO L913 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:40,532 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-18 18:49:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-18 18:49:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-18 18:49:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:49:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 24 transitions. [2022-04-18 18:49:40,556 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 24 transitions. Word has length 1 [2022-04-18 18:49:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:40,556 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 24 transitions. [2022-04-18 18:49:40,557 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 18:49:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 24 transitions. [2022-04-18 18:49:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-04-18 18:49:40,558 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:40,558 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-04-18 18:49:40,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-18 18:49:40,559 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 11 more)] === [2022-04-18 18:49:40,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:40,561 INFO L85 PathProgramCache]: Analyzing trace with hash -866088313, now seen corresponding path program 1 times [2022-04-18 18:49:40,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:40,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650783878] [2022-04-18 18:49:40,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:40,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-18 18:49:40,613 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-18 18:49:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-18 18:49:40,662 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-04-18 18:49:40,663 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-18 18:49:40,664 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2022-04-18 18:49:40,666 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr0ASSERT_VIOLATIONDATA_RACE (12 of 14 remaining) [2022-04-18 18:49:40,666 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr1ASSERT_VIOLATIONDATA_RACE (11 of 14 remaining) [2022-04-18 18:49:40,667 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr2ASSERT_VIOLATIONDATA_RACE (10 of 14 remaining) [2022-04-18 18:49:40,667 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr3ASSERT_VIOLATIONDATA_RACE (9 of 14 remaining) [2022-04-18 18:49:40,667 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (8 of 14 remaining) [2022-04-18 18:49:40,673 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (7 of 14 remaining) [2022-04-18 18:49:40,674 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (6 of 14 remaining) [2022-04-18 18:49:40,674 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (5 of 14 remaining) [2022-04-18 18:49:40,674 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (4 of 14 remaining) [2022-04-18 18:49:40,674 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr0ASSERT_VIOLATIONDATA_RACE (3 of 14 remaining) [2022-04-18 18:49:40,675 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr1ASSERT_VIOLATIONDATA_RACE (2 of 14 remaining) [2022-04-18 18:49:40,675 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr2ASSERT_VIOLATIONDATA_RACE (1 of 14 remaining) [2022-04-18 18:49:40,675 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr3ASSERT_VIOLATIONDATA_RACE (0 of 14 remaining) [2022-04-18 18:49:40,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-18 18:49:40,678 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1] [2022-04-18 18:49:40,679 WARN L232 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-04-18 18:49:40,680 INFO L504 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-04-18 18:49:40,697 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-04-18 18:49:40,698 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-18 18:49:40,699 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 18:49:40,699 INFO L341 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-04-18 18:49:40,700 INFO L116 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-04-18 18:49:40,700 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 108 transitions, 234 flow [2022-04-18 18:49:40,701 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 108 transitions, 234 flow [2022-04-18 18:49:40,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 104 places, 108 transitions, 234 flow [2022-04-18 18:49:40,728 INFO L129 PetriNetUnfolder]: 18/209 cut-off events. [2022-04-18 18:49:40,728 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-04-18 18:49:40,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 18/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 517 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 121. Up to 8 conditions per place. [2022-04-18 18:49:40,734 INFO L116 LiptonReduction]: Number of co-enabled transitions 3708 [2022-04-18 18:49:42,741 INFO L131 LiptonReduction]: Checked pairs total: 15726 [2022-04-18 18:49:42,742 INFO L133 LiptonReduction]: Total number of compositions: 114 [2022-04-18 18:49:42,743 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 50 transitions, 118 flow [2022-04-18 18:49:42,827 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2327 states, 2167 states have (on average 3.2505768343331796) internal successors, (7044), 2326 states have internal predecessors, (7044), 0 states have call successors, (0), 0 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 18:49:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 2327 states, 2167 states have (on average 3.2505768343331796) internal successors, (7044), 2326 states have internal predecessors, (7044), 0 states have call successors, (0), 0 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 18:49:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-04-18 18:49:42,833 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:42,833 INFO L499 BasicCegarLoop]: trace histogram [1] [2022-04-18 18:49:42,833 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2022-04-18 18:49:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash 649, now seen corresponding path program 1 times [2022-04-18 18:49:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:42,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311925103] [2022-04-18 18:49:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:42,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:42,845 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 18:49:42,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:42,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311925103] [2022-04-18 18:49:42,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311925103] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:42,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:42,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-04-18 18:49:42,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043709466] [2022-04-18 18:49:42,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:42,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-18 18:49:42,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-18 18:49:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-18 18:49:42,854 INFO L87 Difference]: Start difference. First operand has 2327 states, 2167 states have (on average 3.2505768343331796) internal successors, (7044), 2326 states have internal predecessors, (7044), 0 states have call successors, (0), 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 18:49:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:42,920 INFO L93 Difference]: Finished difference Result 1560 states and 4596 transitions. [2022-04-18 18:49:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-18 18:49:42,921 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 18:49:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:42,954 INFO L225 Difference]: With dead ends: 1560 [2022-04-18 18:49:42,955 INFO L226 Difference]: Without dead ends: 1489 [2022-04-18 18:49:42,955 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 18:49:42,956 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:42,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-18 18:49:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-04-18 18:49:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1489. [2022-04-18 18:49:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1444 states have (on average 3.0173130193905817) internal successors, (4357), 1488 states have internal predecessors, (4357), 0 states have call successors, (0), 0 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 18:49:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 4357 transitions. [2022-04-18 18:49:43,053 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 4357 transitions. Word has length 1 [2022-04-18 18:49:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:43,053 INFO L478 AbstractCegarLoop]: Abstraction has 1489 states and 4357 transitions. [2022-04-18 18:49:43,056 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 18:49:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 4357 transitions. [2022-04-18 18:49:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-04-18 18:49:43,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:43,057 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-04-18 18:49:43,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-18 18:49:43,057 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2022-04-18 18:49:43,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:43,058 INFO L85 PathProgramCache]: Analyzing trace with hash 19913144, now seen corresponding path program 1 times [2022-04-18 18:49:43,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:43,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580312206] [2022-04-18 18:49:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:43,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 18:49:43,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:43,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580312206] [2022-04-18 18:49:43,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580312206] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:43,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:43,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 18:49:43,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353212097] [2022-04-18 18:49:43,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:43,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 18:49:43,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:43,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 18:49:43,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 18:49:43,105 INFO L87 Difference]: Start difference. First operand 1489 states and 4357 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 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 18:49:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:43,173 INFO L93 Difference]: Finished difference Result 1489 states and 4356 transitions. [2022-04-18 18:49:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 18:49:43,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-04-18 18:49:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:43,184 INFO L225 Difference]: With dead ends: 1489 [2022-04-18 18:49:43,184 INFO L226 Difference]: Without dead ends: 1489 [2022-04-18 18:49:43,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 18:49:43,185 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:43,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 32 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-18 18:49:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-04-18 18:49:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1489. [2022-04-18 18:49:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1444 states have (on average 3.0166204986149583) internal successors, (4356), 1488 states have internal predecessors, (4356), 0 states have call successors, (0), 0 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 18:49:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 4356 transitions. [2022-04-18 18:49:43,227 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 4356 transitions. Word has length 4 [2022-04-18 18:49:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:43,227 INFO L478 AbstractCegarLoop]: Abstraction has 1489 states and 4356 transitions. [2022-04-18 18:49:43,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 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 18:49:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 4356 transitions. [2022-04-18 18:49:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-04-18 18:49:43,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:43,228 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-04-18 18:49:43,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-18 18:49:43,229 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting salethreadErr0ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2022-04-18 18:49:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash 617831897, now seen corresponding path program 1 times [2022-04-18 18:49:43,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:43,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787544116] [2022-04-18 18:49:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:43,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:43,256 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 18:49:43,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787544116] [2022-04-18 18:49:43,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787544116] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:43,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:43,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 18:49:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431304336] [2022-04-18 18:49:43,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:43,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 18:49:43,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 18:49:43,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 18:49:43,258 INFO L87 Difference]: Start difference. First operand 1489 states and 4356 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 18:49:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:43,329 INFO L93 Difference]: Finished difference Result 1616 states and 4380 transitions. [2022-04-18 18:49:43,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 18:49:43,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-04-18 18:49:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:43,339 INFO L225 Difference]: With dead ends: 1616 [2022-04-18 18:49:43,339 INFO L226 Difference]: Without dead ends: 1616 [2022-04-18 18:49:43,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 18:49:43,340 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:43,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-18 18:49:43,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-04-18 18:49:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1314. [2022-04-18 18:49:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1281 states have (on average 2.9656518345042935) internal successors, (3799), 1313 states have internal predecessors, (3799), 0 states have call successors, (0), 0 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 18:49:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 3799 transitions. [2022-04-18 18:49:43,393 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 3799 transitions. Word has length 5 [2022-04-18 18:49:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:43,394 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 3799 transitions. [2022-04-18 18:49:43,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 18:49:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 3799 transitions. [2022-04-18 18:49:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-04-18 18:49:43,395 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:43,395 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-04-18 18:49:43,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-18 18:49:43,395 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting salethreadErr1ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2022-04-18 18:49:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1031045758, now seen corresponding path program 1 times [2022-04-18 18:49:43,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:43,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582546390] [2022-04-18 18:49:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:43,422 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 18:49:43,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:43,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582546390] [2022-04-18 18:49:43,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582546390] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:43,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:43,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 18:49:43,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063841552] [2022-04-18 18:49:43,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:43,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 18:49:43,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:43,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 18:49:43,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 18:49:43,425 INFO L87 Difference]: Start difference. First operand 1314 states and 3799 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:49:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:43,485 INFO L93 Difference]: Finished difference Result 1280 states and 3412 transitions. [2022-04-18 18:49:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 18:49:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-04-18 18:49:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:43,492 INFO L225 Difference]: With dead ends: 1280 [2022-04-18 18:49:43,492 INFO L226 Difference]: Without dead ends: 1092 [2022-04-18 18:49:43,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 18:49:43,493 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:43,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 26 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-18 18:49:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-04-18 18:49:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 952. [2022-04-18 18:49:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 930 states have (on average 2.7655913978494624) internal successors, (2572), 951 states have internal predecessors, (2572), 0 states have call successors, (0), 0 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 18:49:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 2572 transitions. [2022-04-18 18:49:43,519 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 2572 transitions. Word has length 7 [2022-04-18 18:49:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:43,519 INFO L478 AbstractCegarLoop]: Abstraction has 952 states and 2572 transitions. [2022-04-18 18:49:43,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:49:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 2572 transitions. [2022-04-18 18:49:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-18 18:49:43,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:43,521 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-04-18 18:49:43,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-18 18:49:43,521 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2022-04-18 18:49:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:43,522 INFO L85 PathProgramCache]: Analyzing trace with hash 684775472, now seen corresponding path program 1 times [2022-04-18 18:49:43,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:43,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191153209] [2022-04-18 18:49:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:43,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-18 18:49:43,545 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-18 18:49:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-18 18:49:43,557 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-04-18 18:49:43,557 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-18 18:49:43,558 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2022-04-18 18:49:43,558 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr0ASSERT_VIOLATIONDATA_RACE (16 of 18 remaining) [2022-04-18 18:49:43,558 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr1ASSERT_VIOLATIONDATA_RACE (15 of 18 remaining) [2022-04-18 18:49:43,558 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr2ASSERT_VIOLATIONDATA_RACE (14 of 18 remaining) [2022-04-18 18:49:43,559 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr3ASSERT_VIOLATIONDATA_RACE (13 of 18 remaining) [2022-04-18 18:49:43,559 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (12 of 18 remaining) [2022-04-18 18:49:43,559 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (11 of 18 remaining) [2022-04-18 18:49:43,559 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (10 of 18 remaining) [2022-04-18 18:49:43,559 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (9 of 18 remaining) [2022-04-18 18:49:43,560 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (8 of 18 remaining) [2022-04-18 18:49:43,560 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr0ASSERT_VIOLATIONDATA_RACE (7 of 18 remaining) [2022-04-18 18:49:43,560 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr1ASSERT_VIOLATIONDATA_RACE (6 of 18 remaining) [2022-04-18 18:49:43,560 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr2ASSERT_VIOLATIONDATA_RACE (5 of 18 remaining) [2022-04-18 18:49:43,560 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr3ASSERT_VIOLATIONDATA_RACE (4 of 18 remaining) [2022-04-18 18:49:43,560 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr0ASSERT_VIOLATIONDATA_RACE (3 of 18 remaining) [2022-04-18 18:49:43,561 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr1ASSERT_VIOLATIONDATA_RACE (2 of 18 remaining) [2022-04-18 18:49:43,561 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr2ASSERT_VIOLATIONDATA_RACE (1 of 18 remaining) [2022-04-18 18:49:43,561 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr3ASSERT_VIOLATIONDATA_RACE (0 of 18 remaining) [2022-04-18 18:49:43,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-18 18:49:43,562 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-04-18 18:49:43,562 WARN L232 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-04-18 18:49:43,562 INFO L504 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-04-18 18:49:43,573 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-04-18 18:49:43,574 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-18 18:49:43,575 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 18:49:43,575 INFO L341 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-04-18 18:49:43,576 INFO L116 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-04-18 18:49:43,577 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 128 transitions, 286 flow [2022-04-18 18:49:43,577 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 128 transitions, 286 flow [2022-04-18 18:49:43,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 128 transitions, 286 flow [2022-04-18 18:49:43,627 INFO L129 PetriNetUnfolder]: 34/360 cut-off events. [2022-04-18 18:49:43,628 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-04-18 18:49:43,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 360 events. 34/360 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1121 event pairs, 1 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2022-04-18 18:49:43,639 INFO L116 LiptonReduction]: Number of co-enabled transitions 6696 [2022-04-18 18:49:45,893 INFO L131 LiptonReduction]: Checked pairs total: 33119 [2022-04-18 18:49:45,893 INFO L133 LiptonReduction]: Total number of compositions: 134 [2022-04-18 18:49:45,894 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 65 transitions, 160 flow [2022-04-18 18:49:46,944 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32019 states, 31119 states have (on average 4.079179922234005) internal successors, (126940), 32018 states have internal predecessors, (126940), 0 states have call successors, (0), 0 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 18:49:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 32019 states, 31119 states have (on average 4.079179922234005) internal successors, (126940), 32018 states have internal predecessors, (126940), 0 states have call successors, (0), 0 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 18:49:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-04-18 18:49:47,016 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:47,016 INFO L499 BasicCegarLoop]: trace histogram [1] [2022-04-18 18:49:47,017 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2022-04-18 18:49:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:47,018 INFO L85 PathProgramCache]: Analyzing trace with hash 927, now seen corresponding path program 1 times [2022-04-18 18:49:47,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:47,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454500619] [2022-04-18 18:49:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:47,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:47,033 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 18:49:47,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:47,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454500619] [2022-04-18 18:49:47,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454500619] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:47,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:47,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-04-18 18:49:47,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788938321] [2022-04-18 18:49:47,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:47,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-18 18:49:47,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:47,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-18 18:49:47,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-18 18:49:47,125 INFO L87 Difference]: Start difference. First operand has 32019 states, 31119 states have (on average 4.079179922234005) internal successors, (126940), 32018 states have internal predecessors, (126940), 0 states have call successors, (0), 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 18:49:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:47,544 INFO L93 Difference]: Finished difference Result 18346 states and 72827 transitions. [2022-04-18 18:49:47,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-18 18:49:47,545 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 18:49:47,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:47,869 INFO L225 Difference]: With dead ends: 18346 [2022-04-18 18:49:47,870 INFO L226 Difference]: Without dead ends: 17915 [2022-04-18 18:49:47,870 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 18:49:47,871 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:47,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-18 18:49:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17915 states. [2022-04-18 18:49:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17915 to 17915. [2022-04-18 18:49:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17915 states, 17742 states have (on average 3.995265471761921) internal successors, (70884), 17914 states have internal predecessors, (70884), 0 states have call successors, (0), 0 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 18:49:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17915 states to 17915 states and 70884 transitions. [2022-04-18 18:49:48,880 INFO L78 Accepts]: Start accepts. Automaton has 17915 states and 70884 transitions. Word has length 1 [2022-04-18 18:49:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:48,880 INFO L478 AbstractCegarLoop]: Abstraction has 17915 states and 70884 transitions. [2022-04-18 18:49:48,881 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 18:49:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 17915 states and 70884 transitions. [2022-04-18 18:49:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-04-18 18:49:48,884 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:48,885 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-04-18 18:49:48,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-18 18:49:48,885 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2022-04-18 18:49:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash 28611087, now seen corresponding path program 1 times [2022-04-18 18:49:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:48,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503093442] [2022-04-18 18:49:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:48,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:48,920 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 18:49:48,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:48,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503093442] [2022-04-18 18:49:48,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503093442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:48,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:48,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 18:49:48,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888435321] [2022-04-18 18:49:48,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:48,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 18:49:48,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:48,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 18:49:48,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 18:49:48,923 INFO L87 Difference]: Start difference. First operand 17915 states and 70884 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 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 18:49:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:49,218 INFO L93 Difference]: Finished difference Result 17915 states and 70883 transitions. [2022-04-18 18:49:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 18:49:49,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-04-18 18:49:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:49,450 INFO L225 Difference]: With dead ends: 17915 [2022-04-18 18:49:49,450 INFO L226 Difference]: Without dead ends: 17915 [2022-04-18 18:49:49,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 18:49:49,463 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:49,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-18 18:49:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17915 states. [2022-04-18 18:49:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17915 to 17915. [2022-04-18 18:49:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17915 states, 17742 states have (on average 3.9952091083305152) internal successors, (70883), 17914 states have internal predecessors, (70883), 0 states have call successors, (0), 0 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 18:49:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17915 states to 17915 states and 70883 transitions. [2022-04-18 18:49:50,341 INFO L78 Accepts]: Start accepts. Automaton has 17915 states and 70883 transitions. Word has length 4 [2022-04-18 18:49:50,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:50,341 INFO L478 AbstractCegarLoop]: Abstraction has 17915 states and 70883 transitions. [2022-04-18 18:49:50,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 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 18:49:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand 17915 states and 70883 transitions. [2022-04-18 18:49:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-04-18 18:49:50,342 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:50,342 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-04-18 18:49:50,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-18 18:49:50,342 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting salethreadErr0ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2022-04-18 18:49:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:50,343 INFO L85 PathProgramCache]: Analyzing trace with hash 888325434, now seen corresponding path program 1 times [2022-04-18 18:49:50,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:50,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514153247] [2022-04-18 18:49:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:50,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:50,367 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 18:49:50,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:50,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514153247] [2022-04-18 18:49:50,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514153247] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:50,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:50,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 18:49:50,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935967020] [2022-04-18 18:49:50,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:50,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 18:49:50,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:50,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 18:49:50,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 18:49:50,370 INFO L87 Difference]: Start difference. First operand 17915 states and 70883 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 18:49:50,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:50,681 INFO L93 Difference]: Finished difference Result 21275 states and 76687 transitions. [2022-04-18 18:49:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 18:49:50,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-04-18 18:49:50,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:50,792 INFO L225 Difference]: With dead ends: 21275 [2022-04-18 18:49:50,792 INFO L226 Difference]: Without dead ends: 21275 [2022-04-18 18:49:50,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 18:49:50,793 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:50,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 37 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-18 18:49:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21275 states. [2022-04-18 18:49:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21275 to 16050. [2022-04-18 18:49:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16050 states, 15905 states have (on average 3.9143036780886513) internal successors, (62257), 16049 states have internal predecessors, (62257), 0 states have call successors, (0), 0 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 18:49:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16050 states to 16050 states and 62257 transitions. [2022-04-18 18:49:51,424 INFO L78 Accepts]: Start accepts. Automaton has 16050 states and 62257 transitions. Word has length 5 [2022-04-18 18:49:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:51,424 INFO L478 AbstractCegarLoop]: Abstraction has 16050 states and 62257 transitions. [2022-04-18 18:49:51,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 18:49:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 16050 states and 62257 transitions. [2022-04-18 18:49:51,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-04-18 18:49:51,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:51,425 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-04-18 18:49:51,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-18 18:49:51,425 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting salethreadErr1ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2022-04-18 18:49:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:51,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1017703629, now seen corresponding path program 1 times [2022-04-18 18:49:51,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:51,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806386063] [2022-04-18 18:49:51,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:51,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:51,446 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 18:49:51,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:51,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806386063] [2022-04-18 18:49:51,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806386063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:51,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:51,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 18:49:51,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913270781] [2022-04-18 18:49:51,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:51,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 18:49:51,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:51,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 18:49:51,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 18:49:51,448 INFO L87 Difference]: Start difference. First operand 16050 states and 62257 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:49:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:51,760 INFO L93 Difference]: Finished difference Result 16573 states and 58896 transitions. [2022-04-18 18:49:51,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 18:49:51,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-04-18 18:49:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:51,806 INFO L225 Difference]: With dead ends: 16573 [2022-04-18 18:49:51,806 INFO L226 Difference]: Without dead ends: 15688 [2022-04-18 18:49:51,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 18:49:51,807 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:51,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 36 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-18 18:49:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15688 states. [2022-04-18 18:49:52,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15688 to 12942. [2022-04-18 18:49:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12942 states, 12853 states have (on average 3.6479421146813973) internal successors, (46887), 12941 states have internal predecessors, (46887), 0 states have call successors, (0), 0 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 18:49:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12942 states to 12942 states and 46887 transitions. [2022-04-18 18:49:52,300 INFO L78 Accepts]: Start accepts. Automaton has 12942 states and 46887 transitions. Word has length 7 [2022-04-18 18:49:52,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:52,301 INFO L478 AbstractCegarLoop]: Abstraction has 12942 states and 46887 transitions. [2022-04-18 18:49:52,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:49:52,301 INFO L276 IsEmpty]: Start isEmpty. Operand 12942 states and 46887 transitions. [2022-04-18 18:49:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-18 18:49:52,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:52,303 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 18:49:52,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-18 18:49:52,303 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2022-04-18 18:49:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:52,304 INFO L85 PathProgramCache]: Analyzing trace with hash -43288976, now seen corresponding path program 1 times [2022-04-18 18:49:52,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:52,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241009469] [2022-04-18 18:49:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:52,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:52,339 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 18:49:52,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:52,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241009469] [2022-04-18 18:49:52,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241009469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:52,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:52,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-18 18:49:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30247748] [2022-04-18 18:49:52,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:52,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 18:49:52,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:52,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 18:49:52,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 18:49:52,342 INFO L87 Difference]: Start difference. First operand 12942 states and 46887 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 18:49:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:52,603 INFO L93 Difference]: Finished difference Result 10192 states and 36548 transitions. [2022-04-18 18:49:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 18:49:52,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 18:49:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:52,631 INFO L225 Difference]: With dead ends: 10192 [2022-04-18 18:49:52,631 INFO L226 Difference]: Without dead ends: 10186 [2022-04-18 18:49:52,631 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 18:49:52,632 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:52,632 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 58 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-18 18:49:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2022-04-18 18:49:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 10066. [2022-04-18 18:49:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10066 states, 9999 states have (on average 3.6286628662866285) internal successors, (36283), 10065 states have internal predecessors, (36283), 0 states have call successors, (0), 0 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 18:49:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10066 states to 10066 states and 36283 transitions. [2022-04-18 18:49:52,909 INFO L78 Accepts]: Start accepts. Automaton has 10066 states and 36283 transitions. Word has length 14 [2022-04-18 18:49:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:52,909 INFO L478 AbstractCegarLoop]: Abstraction has 10066 states and 36283 transitions. [2022-04-18 18:49:52,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 18:49:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 10066 states and 36283 transitions. [2022-04-18 18:49:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-18 18:49:52,911 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:52,911 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-18 18:49:52,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-18 18:49:52,912 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting salethreadErr0ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2022-04-18 18:49:52,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash 443477234, now seen corresponding path program 1 times [2022-04-18 18:49:52,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:52,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375705908] [2022-04-18 18:49:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:52,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:49:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-18 18:49:52,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:49:52,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375705908] [2022-04-18 18:49:52,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375705908] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:49:52,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:49:52,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 18:49:52,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461844747] [2022-04-18 18:49:52,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:49:52,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 18:49:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:49:52,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 18:49:52,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 18:49:52,950 INFO L87 Difference]: Start difference. First operand 10066 states and 36283 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 18:49:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:49:53,049 INFO L93 Difference]: Finished difference Result 9758 states and 31790 transitions. [2022-04-18 18:49:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 18:49:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 18:49:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:49:53,081 INFO L225 Difference]: With dead ends: 9758 [2022-04-18 18:49:53,081 INFO L226 Difference]: Without dead ends: 9758 [2022-04-18 18:49:53,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 18:49:53,082 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-18 18:49:53,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 40 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-18 18:49:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9758 states. [2022-04-18 18:49:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9758 to 8994. [2022-04-18 18:49:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8994 states, 8942 states have (on average 3.3626705435025723) internal successors, (30069), 8993 states have internal predecessors, (30069), 0 states have call successors, (0), 0 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 18:49:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8994 states to 8994 states and 30069 transitions. [2022-04-18 18:49:53,436 INFO L78 Accepts]: Start accepts. Automaton has 8994 states and 30069 transitions. Word has length 15 [2022-04-18 18:49:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:49:53,437 INFO L478 AbstractCegarLoop]: Abstraction has 8994 states and 30069 transitions. [2022-04-18 18:49:53,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 18:49:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8994 states and 30069 transitions. [2022-04-18 18:49:53,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-18 18:49:53,439 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:49:53,439 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-04-18 18:49:53,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-18 18:49:53,439 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2022-04-18 18:49:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:49:53,440 INFO L85 PathProgramCache]: Analyzing trace with hash 524668496, now seen corresponding path program 1 times [2022-04-18 18:49:53,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:49:53,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058089467] [2022-04-18 18:49:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:49:53,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:49:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-18 18:49:53,454 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-18 18:49:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-18 18:49:53,466 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-04-18 18:49:53,466 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-18 18:49:53,466 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2022-04-18 18:49:53,466 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr0ASSERT_VIOLATIONDATA_RACE (20 of 22 remaining) [2022-04-18 18:49:53,467 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr1ASSERT_VIOLATIONDATA_RACE (19 of 22 remaining) [2022-04-18 18:49:53,467 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr2ASSERT_VIOLATIONDATA_RACE (18 of 22 remaining) [2022-04-18 18:49:53,467 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr3ASSERT_VIOLATIONDATA_RACE (17 of 22 remaining) [2022-04-18 18:49:53,467 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (16 of 22 remaining) [2022-04-18 18:49:53,467 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (15 of 22 remaining) [2022-04-18 18:49:53,467 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (14 of 22 remaining) [2022-04-18 18:49:53,468 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (13 of 22 remaining) [2022-04-18 18:49:53,468 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (12 of 22 remaining) [2022-04-18 18:49:53,468 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr0ASSERT_VIOLATIONDATA_RACE (11 of 22 remaining) [2022-04-18 18:49:53,468 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr1ASSERT_VIOLATIONDATA_RACE (10 of 22 remaining) [2022-04-18 18:49:53,468 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr2ASSERT_VIOLATIONDATA_RACE (9 of 22 remaining) [2022-04-18 18:49:53,468 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr3ASSERT_VIOLATIONDATA_RACE (8 of 22 remaining) [2022-04-18 18:49:53,469 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr0ASSERT_VIOLATIONDATA_RACE (7 of 22 remaining) [2022-04-18 18:49:53,469 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr1ASSERT_VIOLATIONDATA_RACE (6 of 22 remaining) [2022-04-18 18:49:53,469 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr2ASSERT_VIOLATIONDATA_RACE (5 of 22 remaining) [2022-04-18 18:49:53,469 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr3ASSERT_VIOLATIONDATA_RACE (4 of 22 remaining) [2022-04-18 18:49:53,469 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr0ASSERT_VIOLATIONDATA_RACE (3 of 22 remaining) [2022-04-18 18:49:53,469 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr1ASSERT_VIOLATIONDATA_RACE (2 of 22 remaining) [2022-04-18 18:49:53,470 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr2ASSERT_VIOLATIONDATA_RACE (1 of 22 remaining) [2022-04-18 18:49:53,470 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location salethreadErr3ASSERT_VIOLATIONDATA_RACE (0 of 22 remaining) [2022-04-18 18:49:53,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-18 18:49:53,470 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-04-18 18:49:53,470 WARN L232 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-04-18 18:49:53,471 INFO L504 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-04-18 18:49:53,489 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-04-18 18:49:53,490 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-18 18:49:53,491 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 18:49:53,491 INFO L341 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2022-04-18 18:49:53,492 INFO L116 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-04-18 18:49:53,502 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 148 transitions, 340 flow [2022-04-18 18:49:53,503 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 148 transitions, 340 flow [2022-04-18 18:49:53,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 142 places, 148 transitions, 340 flow [2022-04-18 18:49:53,565 INFO L129 PetriNetUnfolder]: 66/635 cut-off events. [2022-04-18 18:49:53,565 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-04-18 18:49:53,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 635 events. 66/635 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2540 event pairs, 6 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 380. Up to 32 conditions per place. [2022-04-18 18:49:53,589 INFO L116 LiptonReduction]: Number of co-enabled transitions 10440 [2022-04-18 18:49:56,121 INFO L131 LiptonReduction]: Checked pairs total: 52637 [2022-04-18 18:49:56,121 INFO L133 LiptonReduction]: Total number of compositions: 154 [2022-04-18 18:49:56,122 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 77 places, 79 transitions, 202 flow [2022-04-18 18:50:08,209 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 409660 states, 404520 states have (on average 4.970770295659053) internal successors, (2010776), 409659 states have internal predecessors, (2010776), 0 states have call successors, (0), 0 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 18:50:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 409660 states, 404520 states have (on average 4.970770295659053) internal successors, (2010776), 409659 states have internal predecessors, (2010776), 0 states have call successors, (0), 0 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 18:50:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-04-18 18:50:08,941 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:50:08,941 INFO L499 BasicCegarLoop]: trace histogram [1] [2022-04-18 18:50:08,941 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 23 more)] === [2022-04-18 18:50:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:50:08,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1243, now seen corresponding path program 1 times [2022-04-18 18:50:08,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:50:08,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954655234] [2022-04-18 18:50:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:50:08,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:50:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:50:08,950 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 18:50:08,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:50:08,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954655234] [2022-04-18 18:50:08,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954655234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:50:08,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:50:08,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-04-18 18:50:08,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027761609] [2022-04-18 18:50:08,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:50:08,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-18 18:50:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:50:08,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-18 18:50:08,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-18 18:50:09,685 INFO L87 Difference]: Start difference. First operand has 409660 states, 404520 states have (on average 4.970770295659053) internal successors, (2010776), 409659 states have internal predecessors, (2010776), 0 states have call successors, (0), 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 18:50:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:50:14,201 INFO L93 Difference]: Finished difference Result 197847 states and 970353 transitions. [2022-04-18 18:50:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-18 18:50:14,201 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 18:50:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-18 18:50:16,047 INFO L225 Difference]: With dead ends: 197847 [2022-04-18 18:50:16,047 INFO L226 Difference]: Without dead ends: 195688 [2022-04-18 18:50:16,047 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 18:50:16,048 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-18 18:50:16,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-18 18:50:17,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195688 states. [2022-04-18 18:50:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195688 to 195688. [2022-04-18 18:50:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195688 states, 195031 states have (on average 4.914470007332167) internal successors, (958474), 195687 states have internal predecessors, (958474), 0 states have call successors, (0), 0 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 18:50:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195688 states to 195688 states and 958474 transitions. [2022-04-18 18:50:26,619 INFO L78 Accepts]: Start accepts. Automaton has 195688 states and 958474 transitions. Word has length 1 [2022-04-18 18:50:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-18 18:50:26,619 INFO L478 AbstractCegarLoop]: Abstraction has 195688 states and 958474 transitions. [2022-04-18 18:50:26,619 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 18:50:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 195688 states and 958474 transitions. [2022-04-18 18:50:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-04-18 18:50:26,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-18 18:50:26,620 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-04-18 18:50:26,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-18 18:50:26,620 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE === [salethreadErr0ASSERT_VIOLATIONDATA_RACE, salethreadErr1ASSERT_VIOLATIONDATA_RACE, salethreadErr2ASSERT_VIOLATIONDATA_RACE (and 23 more)] === [2022-04-18 18:50:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-18 18:50:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash 38600003, now seen corresponding path program 1 times [2022-04-18 18:50:26,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-04-18 18:50:26,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692405738] [2022-04-18 18:50:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-18 18:50:26,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-18 18:50:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-18 18:50:26,640 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 18:50:26,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-04-18 18:50:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692405738] [2022-04-18 18:50:26,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692405738] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-18 18:50:26,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-18 18:50:26,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-18 18:50:26,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33744208] [2022-04-18 18:50:26,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-18 18:50:26,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-18 18:50:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-04-18 18:50:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-18 18:50:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-18 18:50:26,645 INFO L87 Difference]: Start difference. First operand 195688 states and 958474 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 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 18:50:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-18 18:50:29,202 INFO L93 Difference]: Finished difference Result 195688 states and 958473 transitions. [2022-04-18 18:50:29,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-18 18:50:29,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-04-18 18:50:29,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted.