./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-1b.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 9bd2c7ff 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_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-1b.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 e74a9d887f2b5ed1ee32deb282db19752d3db312511ed38f97d9f22bdf2fecb9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:47:54,830 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:47:54,967 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DataRace-32bit-Taipan_Default.epf [2023-11-19 04:47:54,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:47:54,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:47:55,031 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:47:55,033 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:47:55,034 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:47:55,035 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:47:55,040 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:47:55,041 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:47:55,042 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:47:55,043 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:47:55,048 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:47:55,049 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:47:55,049 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:47:55,050 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:47:55,050 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:47:55,051 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:47:55,051 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:47:55,052 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:47:55,054 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:47:55,055 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:47:55,056 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:47:55,056 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:47:55,057 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:47:55,057 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:47:55,058 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:47:55,058 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:47:55,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:47:55,060 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:47:55,060 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-19 04:47:55,061 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:47:55,061 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:47:55,061 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:47:55,061 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:47:55,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:47:55,062 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:47:55,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:47:55,063 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:47:55,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:47:55,063 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:47:55,064 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:47:55,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:47:55,065 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:47:55,065 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:47:55,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:47:55,065 INFO L153 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e74a9d887f2b5ed1ee32deb282db19752d3db312511ed38f97d9f22bdf2fecb9 [2023-11-19 04:47:55,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:47:55,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:47:55,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:47:55,480 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:47:55,480 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:47:55,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/pthread-atomic/read_write_lock-1b.i [2023-11-19 04:47:58,669 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:47:59,003 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:47:59,003 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/sv-benchmarks/c/pthread-atomic/read_write_lock-1b.i [2023-11-19 04:47:59,037 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/data/1ae38b2cf/426376d89b004519a50241c3bedf50fc/FLAGf097811aa [2023-11-19 04:47:59,062 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/data/1ae38b2cf/426376d89b004519a50241c3bedf50fc [2023-11-19 04:47:59,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:47:59,067 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:47:59,069 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:47:59,069 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:47:59,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:47:59,078 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7910a9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59, skipping insertion in model container [2023-11-19 04:47:59,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,156 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:47:59,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:47:59,536 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:47:59,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:47:59,666 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:47:59,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59 WrapperNode [2023-11-19 04:47:59,667 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:47:59,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:47:59,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:47:59,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:47:59,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,718 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,754 INFO L138 Inliner]: procedures = 171, calls = 36, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 169 [2023-11-19 04:47:59,756 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:47:59,757 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:47:59,757 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:47:59,757 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:47:59,768 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,784 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,804 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,816 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,818 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,822 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:47:59,823 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:47:59,823 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:47:59,823 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:47:59,824 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (1/1) ... [2023-11-19 04:47:59,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:47:59,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:59,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:47:59,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e16875b-5041-4555-930e-c8d1fb1c7383/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:47:59,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:47:59,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:47:59,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:47:59,931 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-11-19 04:47:59,931 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-11-19 04:47:59,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:47:59,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:47:59,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:47:59,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:47:59,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:47:59,935 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-11-19 04:47:59,935 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-11-19 04:47:59,937 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 04:48:00,146 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:48:00,150 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:48:00,479 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:48:00,576 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:48:00,576 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:48:00,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:00 BoogieIcfgContainer [2023-11-19 04:48:00,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:48:00,584 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:48:00,584 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:48:00,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:48:00,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:47:59" (1/3) ... [2023-11-19 04:48:00,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45307c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:00, skipping insertion in model container [2023-11-19 04:48:00,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:59" (2/3) ... [2023-11-19 04:48:00,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45307c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:00, skipping insertion in model container [2023-11-19 04:48:00,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:00" (3/3) ... [2023-11-19 04:48:00,590 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-1b.i [2023-11-19 04:48:00,600 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 04:48:00,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:48:00,615 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-19 04:48:00,615 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 04:48:00,740 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 04:48:00,798 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:48:00,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 206 transitions, 440 flow [2023-11-19 04:48:00,824 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 206 transitions, 440 flow [2023-11-19 04:48:00,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 206 transitions, 440 flow [2023-11-19 04:48:00,982 INFO L124 PetriNetUnfolderBase]: 8/202 cut-off events. [2023-11-19 04:48:00,982 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 04:48:01,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 202 events. 8/202 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 425 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-11-19 04:48:01,029 INFO L119 LiptonReduction]: Number of co-enabled transitions 16794 [2023-11-19 04:48:06,969 INFO L134 LiptonReduction]: Checked pairs total: 108218 [2023-11-19 04:48:06,970 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-11-19 04:48:06,980 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 106 places, 96 transitions, 220 flow [2023-11-19 04:48:19,043 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 298199 states, 290330 states have (on average 4.645169290118141) internal successors, (1348632), 298198 states have internal predecessors, (1348632), 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) [2023-11-19 04:48:19,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:48:19,103 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=LoopHeads, 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;@17c22e66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:48:19,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-19 04:48:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 298199 states, 290330 states have (on average 4.645169290118141) internal successors, (1348632), 298198 states have internal predecessors, (1348632), 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) [2023-11-19 04:48:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:48:19,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:19,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 04:48:19,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting writerErr1ASSERT_VIOLATIONDATA_RACE === [readerErr0ASSERT_VIOLATIONDATA_RACE, readerErr1ASSERT_VIOLATIONDATA_RACE, readerErr2ASSERT_VIOLATIONDATA_RACE, readerErr3ASSERT_VIOLATIONDATA_RACE (and 46 more)] === [2023-11-19 04:48:19,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:19,497 INFO L85 PathProgramCache]: Analyzing trace with hash 722830, now seen corresponding path program 1 times [2023-11-19 04:48:19,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:19,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106658619] [2023-11-19 04:48:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:19,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:19,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:19,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106658619] [2023-11-19 04:48:19,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106658619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:19,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:19,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:48:19,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120284862] [2023-11-19 04:48:19,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:19,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:48:19,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:48:19,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:48:20,269 INFO L87 Difference]: Start difference. First operand has 298199 states, 290330 states have (on average 4.645169290118141) internal successors, (1348632), 298198 states have internal predecessors, (1348632), 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 3.0) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-19 04:48:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:22,832 INFO L93 Difference]: Finished difference Result 75657 states and 311628 transitions. [2023-11-19 04:48:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:48:22,836 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 3.0) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-19 04:48:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:24,693 INFO L225 Difference]: With dead ends: 75657 [2023-11-19 04:48:24,694 INFO L226 Difference]: Without dead ends: 75610 [2023-11-19 04:48:24,695 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 [2023-11-19 04:48:24,699 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:24,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75610 states. [2023-11-19 04:48:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75610 to 75610. [2023-11-19 04:48:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75610 states, 75386 states have (on average 4.131363913724034) internal successors, (311447), 75609 states have internal predecessors, (311447), 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) [2023-11-19 04:48:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75610 states to 75610 states and 311447 transitions. [2023-11-19 04:48:29,843 INFO L78 Accepts]: Start accepts. Automaton has 75610 states and 311447 transitions. Word has length 3 [2023-11-19 04:48:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:29,843 INFO L495 AbstractCegarLoop]: Abstraction has 75610 states and 311447 transitions. [2023-11-19 04:48:29,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 3.0) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-19 04:48:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 75610 states and 311447 transitions. [2023-11-19 04:48:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:48:29,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:29,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:48:29,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:48:29,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting writerErr3ASSERT_VIOLATIONDATA_RACE === [readerErr0ASSERT_VIOLATIONDATA_RACE, readerErr1ASSERT_VIOLATIONDATA_RACE, readerErr2ASSERT_VIOLATIONDATA_RACE, readerErr3ASSERT_VIOLATIONDATA_RACE (and 46 more)] === [2023-11-19 04:48:29,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash 60662066, now seen corresponding path program 1 times [2023-11-19 04:48:29,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:29,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778388714] [2023-11-19 04:48:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:29,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:29,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778388714] [2023-11-19 04:48:29,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778388714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:29,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:29,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:29,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440998644] [2023-11-19 04:48:29,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:29,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:29,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:29,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:29,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:29,957 INFO L87 Difference]: Start difference. First operand 75610 states and 311447 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-19 04:48:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:32,007 INFO L93 Difference]: Finished difference Result 89240 states and 369503 transitions. [2023-11-19 04:48:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:32,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-11-19 04:48:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:32,747 INFO L225 Difference]: With dead ends: 89240 [2023-11-19 04:48:32,747 INFO L226 Difference]: Without dead ends: 89240 [2023-11-19 04:48:32,747 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 [2023-11-19 04:48:32,748 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 46 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:32,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 65 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89240 states. [2023-11-19 04:48:36,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89240 to 82404. [2023-11-19 04:48:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82404 states, 82180 states have (on average 4.141993185689949) internal successors, (340389), 82403 states have internal predecessors, (340389), 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) [2023-11-19 04:48:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82404 states to 82404 states and 340389 transitions. [2023-11-19 04:48:37,293 INFO L78 Accepts]: Start accepts. Automaton has 82404 states and 340389 transitions. Word has length 6 [2023-11-19 04:48:37,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:37,293 INFO L495 AbstractCegarLoop]: Abstraction has 82404 states and 340389 transitions. [2023-11-19 04:48:37,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-19 04:48:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 82404 states and 340389 transitions. [2023-11-19 04:48:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:48:37,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:37,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:37,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:48:37,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr3ASSERT_VIOLATIONDATA_RACE === [readerErr0ASSERT_VIOLATIONDATA_RACE, readerErr1ASSERT_VIOLATIONDATA_RACE, readerErr2ASSERT_VIOLATIONDATA_RACE, readerErr3ASSERT_VIOLATIONDATA_RACE (and 46 more)] === [2023-11-19 04:48:37,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1926053345, now seen corresponding path program 1 times [2023-11-19 04:48:37,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:37,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307615017] [2023-11-19 04:48:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:37,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:37,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:37,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307615017] [2023-11-19 04:48:37,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307615017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:37,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:37,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:37,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792048625] [2023-11-19 04:48:37,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:37,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:37,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:37,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:37,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:37,419 INFO L87 Difference]: Start difference. First operand 82404 states and 340389 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) [2023-11-19 04:48:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:39,438 INFO L93 Difference]: Finished difference Result 148368 states and 597866 transitions. [2023-11-19 04:48:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:39,440 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 [2023-11-19 04:48:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:41,285 INFO L225 Difference]: With dead ends: 148368 [2023-11-19 04:48:41,285 INFO L226 Difference]: Without dead ends: 148264 [2023-11-19 04:48:41,286 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 [2023-11-19 04:48:41,287 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 53 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:41,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]