./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread/singleton-b.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/singleton-b.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh --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 8df6b0e07576c0f44be76a2619065be37971886a948c5dcc3b73910d3c970468 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:49:43,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:49:43,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:49:43,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:49:43,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:49:43,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:49:43,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:49:43,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:49:43,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:49:43,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:49:43,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:49:43,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:49:43,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:49:43,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:49:43,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:49:43,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:49:43,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:49:43,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:49:43,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:49:43,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:49:43,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:49:43,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:49:43,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:49:43,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:49:43,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:49:43,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:49:43,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:49:43,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:49:43,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:49:43,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:49:43,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:49:43,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:49:43,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:49:43,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:49:43,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:49:43,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:49:43,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:49:43,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:49:43,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:49:43,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:49:43,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:49:43,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/config/svcomp-DataRace-32bit-Taipan_Default.epf [2022-12-14 13:49:43,933 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:49:43,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:49:43,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:49:43,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:49:43,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:49:43,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:49:43,935 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:49:43,935 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:49:43,935 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:49:43,935 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:49:43,935 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:49:43,935 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:49:43,936 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:49:43,936 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:49:43,936 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:49:43,936 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:49:43,936 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:49:43,936 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:49:43,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:49:43,937 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:49:43,937 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:49:43,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:49:43,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:49:43,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:49:43,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:49:43,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:49:43,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:49:43,938 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-12-14 13:49:43,939 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:49:43,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:49:43,939 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:49:43,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:49:43,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:49:43,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:49:43,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:49:43,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:49:43,940 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:49:43,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:49:43,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:49:43,940 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:49:43,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:49:43,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:49:43,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:49:43,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8df6b0e07576c0f44be76a2619065be37971886a948c5dcc3b73910d3c970468 [2022-12-14 13:49:44,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:49:44,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:49:44,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:49:44,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:49:44,146 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:49:44,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread/singleton-b.i [2022-12-14 13:49:46,865 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:49:47,089 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:49:47,089 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/sv-benchmarks/c/pthread/singleton-b.i [2022-12-14 13:49:47,099 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/data/d72beb3ba/9778037d6bd34def9e67d6d906348b83/FLAG0425554af [2022-12-14 13:49:47,110 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/data/d72beb3ba/9778037d6bd34def9e67d6d906348b83 [2022-12-14 13:49:47,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:49:47,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:49:47,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:49:47,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:49:47,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:49:47,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2394db53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47, skipping insertion in model container [2022-12-14 13:49:47,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:49:47,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:49:47,459 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/sv-benchmarks/c/pthread/singleton-b.i[55202,55215] [2022-12-14 13:49:47,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:49:47,483 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:49:47,508 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/sv-benchmarks/c/pthread/singleton-b.i[55202,55215] [2022-12-14 13:49:47,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:49:47,554 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:49:47,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47 WrapperNode [2022-12-14 13:49:47,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:49:47,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:49:47,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:49:47,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:49:47,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,588 INFO L138 Inliner]: procedures = 323, calls = 47, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2022-12-14 13:49:47,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:49:47,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:49:47,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:49:47,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:49:47,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,611 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:49:47,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:49:47,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:49:47,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:49:47,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (1/1) ... [2022-12-14 13:49:47,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:49:47,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:47,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:49:47,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2067407-e494-42bd-b6c0-f482641cff05/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:49:47,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:49:47,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:49:47,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:49:47,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-12-14 13:49:47,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-12-14 13:49:47,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 13:49:47,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 13:49:47,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 13:49:47,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 13:49:47,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 13:49:47,663 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 13:49:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:49:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 13:49:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:49:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:49:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:49:47,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:49:47,664 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 13:49:47,761 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:49:47,763 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:49:48,025 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:49:48,031 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:49:48,032 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 13:49:48,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:49:48 BoogieIcfgContainer [2022-12-14 13:49:48,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:49:48,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:49:48,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:49:48,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:49:48,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:49:47" (1/3) ... [2022-12-14 13:49:48,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea9281f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:49:48, skipping insertion in model container [2022-12-14 13:49:48,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:49:47" (2/3) ... [2022-12-14 13:49:48,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea9281f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:49:48, skipping insertion in model container [2022-12-14 13:49:48,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:49:48" (3/3) ... [2022-12-14 13:49:48,040 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton-b.i [2022-12-14 13:49:48,046 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 13:49:48,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:49:48,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-12-14 13:49:48,054 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 13:49:48,210 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2022-12-14 13:49:48,239 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 13:49:48,252 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 306 places, 296 transitions, 699 flow [2022-12-14 13:49:48,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 306 places, 296 transitions, 699 flow [2022-12-14 13:49:48,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 306 places, 296 transitions, 699 flow [2022-12-14 13:49:48,318 INFO L130 PetriNetUnfolder]: 6/209 cut-off events. [2022-12-14 13:49:48,318 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-14 13:49:48,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 209 events. 6/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 191 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 186. Up to 3 conditions per place. [2022-12-14 13:49:48,327 INFO L119 LiptonReduction]: Number of co-enabled transitions 7920 [2022-12-14 13:49:52,543 INFO L134 LiptonReduction]: Checked pairs total: 47290 [2022-12-14 13:49:52,543 INFO L136 LiptonReduction]: Total number of compositions: 182 [2022-12-14 13:49:52,551 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 153 places, 142 transitions, 391 flow [2022-12-14 13:50:02,264 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 313773 states, 313364 states have (on average 5.126893963569523) internal successors, (1606584), 313772 states have internal predecessors, (1606584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:02,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:50:02,288 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e609fca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:50:02,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-12-14 13:50:02,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 313773 states, 313364 states have (on average 5.126893963569523) internal successors, (1606584), 313772 states have internal predecessors, (1606584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:50:02,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:02,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:50:02,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONDATA_RACE === [thread0Err0ASSERT_VIOLATIONDATA_RACE, thread0Err1ASSERT_VIOLATIONDATA_RACE, thread0Err2ASSERT_VIOLATIONDATA_RACE, thread0Err3ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2022-12-14 13:50:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:02,743 INFO L85 PathProgramCache]: Analyzing trace with hash 730128342, now seen corresponding path program 1 times [2022-12-14 13:50:02,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:02,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917964868] [2022-12-14 13:50:02,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:02,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:50:02,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:02,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917964868] [2022-12-14 13:50:02,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917964868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:50:02,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:50:02,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:50:02,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830648780] [2022-12-14 13:50:02,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:50:02,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 13:50:02,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 13:50:02,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:50:03,467 INFO L87 Difference]: Start difference. First operand has 313773 states, 313364 states have (on average 5.126893963569523) internal successors, (1606584), 313772 states have internal predecessors, (1606584), 0 states have call successors, (0), 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 5.0) internal successors, (5), 2 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) [2022-12-14 13:50:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:50:05,842 INFO L93 Difference]: Finished difference Result 188955 states and 950720 transitions. [2022-12-14 13:50:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 13:50:05,844 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 5.0) internal successors, (5), 2 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 [2022-12-14 13:50:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:50:07,424 INFO L225 Difference]: With dead ends: 188955 [2022-12-14 13:50:07,424 INFO L226 Difference]: Without dead ends: 188950 [2022-12-14 13:50:07,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:50:07,429 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:50:07,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:50:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188950 states. [2022-12-14 13:50:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188950 to 188950. [2022-12-14 13:50:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188950 states, 188857 states have (on average 5.034015154323113) internal successors, (950709), 188949 states have internal predecessors, (950709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188950 states to 188950 states and 950709 transitions. [2022-12-14 13:50:14,951 INFO L78 Accepts]: Start accepts. Automaton has 188950 states and 950709 transitions. Word has length 5 [2022-12-14 13:50:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:14,951 INFO L495 AbstractCegarLoop]: Abstraction has 188950 states and 950709 transitions. [2022-12-14 13:50:14,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 5.0) internal successors, (5), 2 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) [2022-12-14 13:50:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 188950 states and 950709 transitions. [2022-12-14 13:50:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:50:14,952 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:14,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:14,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:50:14,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread0Err0ASSERT_VIOLATIONDATA_RACE === [thread0Err0ASSERT_VIOLATIONDATA_RACE, thread0Err1ASSERT_VIOLATIONDATA_RACE, thread0Err2ASSERT_VIOLATIONDATA_RACE, thread0Err3ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2022-12-14 13:50:14,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1538565241, now seen corresponding path program 1 times [2022-12-14 13:50:14,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:14,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001816516] [2022-12-14 13:50:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:14,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:50:15,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:15,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001816516] [2022-12-14 13:50:15,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001816516] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:50:15,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:50:15,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:50:15,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943045316] [2022-12-14 13:50:15,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:50:15,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:50:15,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:50:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:50:15,254 INFO L87 Difference]: Start difference. First operand 188950 states and 950709 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:50:17,329 INFO L93 Difference]: Finished difference Result 188934 states and 950671 transitions. [2022-12-14 13:50:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:50:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-12-14 13:50:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:50:18,736 INFO L225 Difference]: With dead ends: 188934 [2022-12-14 13:50:18,736 INFO L226 Difference]: Without dead ends: 188934 [2022-12-14 13:50:18,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:50:18,737 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 39 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:50:18,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 74 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:50:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188934 states. [2022-12-14 13:50:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188934 to 188934. [2022-12-14 13:50:24,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188934 states, 188843 states have (on average 5.034187128990749) internal successors, (950671), 188933 states have internal predecessors, (950671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188934 states to 188934 states and 950671 transitions. [2022-12-14 13:50:25,984 INFO L78 Accepts]: Start accepts. Automaton has 188934 states and 950671 transitions. Word has length 8 [2022-12-14 13:50:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:25,984 INFO L495 AbstractCegarLoop]: Abstraction has 188934 states and 950671 transitions. [2022-12-14 13:50:25,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 188934 states and 950671 transitions. [2022-12-14 13:50:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:50:25,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:25,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:25,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:50:25,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thread0Err0ASSERT_VIOLATIONDATA_RACE, thread0Err1ASSERT_VIOLATIONDATA_RACE, thread0Err2ASSERT_VIOLATIONDATA_RACE, thread0Err3ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2022-12-14 13:50:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash -747886665, now seen corresponding path program 1 times [2022-12-14 13:50:25,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:25,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111906727] [2022-12-14 13:50:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:25,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:50:26,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:26,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111906727] [2022-12-14 13:50:26,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111906727] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:50:26,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:50:26,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:50:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079476306] [2022-12-14 13:50:26,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:50:26,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:50:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:50:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:50:26,140 INFO L87 Difference]: Start difference. First operand 188934 states and 950671 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:50:29,815 INFO L93 Difference]: Finished difference Result 293617 states and 1461028 transitions. [2022-12-14 13:50:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:50:29,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-12-14 13:50:29,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:50:31,883 INFO L225 Difference]: With dead ends: 293617 [2022-12-14 13:50:31,884 INFO L226 Difference]: Without dead ends: 293593 [2022-12-14 13:50:31,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:50:31,885 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 241 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:50:31,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 226 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:50:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293593 states. [2022-12-14 13:50:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293593 to 272213. [2022-12-14 13:50:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272213 states, 272122 states have (on average 5.047144295573309) internal successors, (1373439), 272212 states have internal predecessors, (1373439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272213 states to 272213 states and 1373439 transitions. [2022-12-14 13:50:42,635 INFO L78 Accepts]: Start accepts. Automaton has 272213 states and 1373439 transitions. Word has length 8 [2022-12-14 13:50:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:42,635 INFO L495 AbstractCegarLoop]: Abstraction has 272213 states and 1373439 transitions. [2022-12-14 13:50:42,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 272213 states and 1373439 transitions. [2022-12-14 13:50:42,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 13:50:42,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:42,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:42,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:50:42,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err1ASSERT_VIOLATIONDATA_RACE === [thread0Err0ASSERT_VIOLATIONDATA_RACE, thread0Err1ASSERT_VIOLATIONDATA_RACE, thread0Err2ASSERT_VIOLATIONDATA_RACE, thread0Err3ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2022-12-14 13:50:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:42,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1573995430, now seen corresponding path program 1 times [2022-12-14 13:50:42,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:42,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942291798] [2022-12-14 13:50:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:42,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:50:42,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:42,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942291798] [2022-12-14 13:50:42,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942291798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:50:42,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:50:42,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:50:42,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216822575] [2022-12-14 13:50:42,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:50:42,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:50:42,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:42,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:50:42,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:50:42,743 INFO L87 Difference]: Start difference. First operand 272213 states and 1373439 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:50:45,792 INFO L93 Difference]: Finished difference Result 294057 states and 1488521 transitions. [2022-12-14 13:50:45,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:50:45,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-12-14 13:50:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:50:48,172 INFO L225 Difference]: With dead ends: 294057 [2022-12-14 13:50:48,172 INFO L226 Difference]: Without dead ends: 294057 [2022-12-14 13:50:48,172 INFO L412 NwaCegarLoop]: 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 [2022-12-14 13:50:48,173 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 27 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:50:48,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 76 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:50:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294057 states. [2022-12-14 13:50:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294057 to 294057. [2022-12-14 13:50:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294057 states, 293966 states have (on average 5.0635821829735415) internal successors, (1488521), 294056 states have internal predecessors, (1488521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294057 states to 294057 states and 1488521 transitions. [2022-12-14 13:50:58,900 INFO L78 Accepts]: Start accepts. Automaton has 294057 states and 1488521 transitions. Word has length 19 [2022-12-14 13:50:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:58,900 INFO L495 AbstractCegarLoop]: Abstraction has 294057 states and 1488521 transitions. [2022-12-14 13:50:58,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 294057 states and 1488521 transitions. [2022-12-14 13:50:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:50:58,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:58,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:58,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:50:58,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONDATA_RACE === [thread0Err0ASSERT_VIOLATIONDATA_RACE, thread0Err1ASSERT_VIOLATIONDATA_RACE, thread0Err2ASSERT_VIOLATIONDATA_RACE, thread0Err3ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2022-12-14 13:50:58,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:58,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1722569347, now seen corresponding path program 1 times [2022-12-14 13:50:58,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:58,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350848261] [2022-12-14 13:50:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:58,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:50:59,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:59,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350848261] [2022-12-14 13:50:59,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350848261] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:50:59,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:50:59,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:50:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156041954] [2022-12-14 13:50:59,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:50:59,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:50:59,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:50:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:50:59,053 INFO L87 Difference]: Start difference. First operand 294057 states and 1488521 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:02,391 INFO L93 Difference]: Finished difference Result 316719 states and 1607818 transitions. [2022-12-14 13:51:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:51:02,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-12-14 13:51:02,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted.