./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/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_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW --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 e74a9d887f2b5ed1ee32deb282db19752d3db312511ed38f97d9f22bdf2fecb9 --- 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-4e7fbc6 [2022-11-23 14:56:42,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:56:42,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:56:42,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:56:42,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:56:42,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:56:42,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:56:42,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:56:42,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:56:42,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:56:42,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:56:42,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:56:42,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:56:42,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:56:42,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:56:42,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:56:42,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:56:42,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:56:42,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:56:42,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:56:42,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:56:42,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:56:42,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:56:42,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:56:42,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:56:42,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:56:42,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:56:42,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:56:42,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:56:42,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:56:42,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:56:42,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:56:42,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:56:42,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:56:42,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:56:42,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:56:42,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:56:42,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:56:42,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:56:42,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:56:42,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:56:42,128 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/config/svcomp-DataRace-32bit-Taipan_Default.epf [2022-11-23 14:56:42,155 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:56:42,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:56:42,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:56:42,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:56:42,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:56:42,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:56:42,158 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:56:42,158 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:56:42,159 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:56:42,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:56:42,159 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:56:42,160 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:56:42,160 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:56:42,160 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:56:42,161 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:56:42,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:56:42,161 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:56:42,161 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:56:42,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:56:42,163 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:56:42,163 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:56:42,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:56:42,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:56:42,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:56:42,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:56:42,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:56:42,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:56:42,165 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-11-23 14:56:42,166 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:56:42,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:56:42,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:56:42,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:56:42,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:56:42,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:56:42,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:56:42,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:56:42,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:56:42,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:56:42,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:56:42,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:56:42,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:56:42,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:56:42,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:56:42,170 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_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e74a9d887f2b5ed1ee32deb282db19752d3db312511ed38f97d9f22bdf2fecb9 [2022-11-23 14:56:42,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:56:42,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:56:42,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:56:42,452 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:56:42,452 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:56:42,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/pthread-atomic/read_write_lock-1b.i [2022-11-23 14:56:45,727 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:56:46,075 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:56:46,076 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/sv-benchmarks/c/pthread-atomic/read_write_lock-1b.i [2022-11-23 14:56:46,093 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/data/516b47dd3/1461f50d69794cf8af8a232eee5ab820/FLAG76557d941 [2022-11-23 14:56:46,111 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/data/516b47dd3/1461f50d69794cf8af8a232eee5ab820 [2022-11-23 14:56:46,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:56:46,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:56:46,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:56:46,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:56:46,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:56:46,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a776011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46, skipping insertion in model container [2022-11-23 14:56:46,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:56:46,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:56:46,554 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_6943a733-2c88-4ec0-953a-f933f3b94c88/sv-benchmarks/c/pthread-atomic/read_write_lock-1b.i[30416,30429] [2022-11-23 14:56:46,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:56:46,573 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:56:46,611 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_6943a733-2c88-4ec0-953a-f933f3b94c88/sv-benchmarks/c/pthread-atomic/read_write_lock-1b.i[30416,30429] [2022-11-23 14:56:46,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:56:46,653 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:56:46,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46 WrapperNode [2022-11-23 14:56:46,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:56:46,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:56:46,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:56:46,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:56:46,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,706 INFO L138 Inliner]: procedures = 171, calls = 35, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 167 [2022-11-23 14:56:46,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:56:46,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:56:46,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:56:46,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:56:46,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,769 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:56:46,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:56:46,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:56:46,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:56:46,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (1/1) ... [2022-11-23 14:56:46,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:56:46,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:56:46,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:56:46,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6943a733-2c88-4ec0-953a-f933f3b94c88/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:56:46,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:56:46,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:56:46,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:56:46,862 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2022-11-23 14:56:46,862 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2022-11-23 14:56:46,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:56:46,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:56:46,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:56:46,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:56:46,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:56:46,863 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2022-11-23 14:56:46,864 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2022-11-23 14:56:46,865 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 14:56:47,042 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:56:47,048 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:56:47,520 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:56:47,692 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:56:47,692 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:56:47,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:56:47 BoogieIcfgContainer [2022-11-23 14:56:47,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:56:47,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:56:47,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:56:47,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:56:47,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:56:46" (1/3) ... [2022-11-23 14:56:47,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b5ffe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:56:47, skipping insertion in model container [2022-11-23 14:56:47,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:56:46" (2/3) ... [2022-11-23 14:56:47,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b5ffe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:56:47, skipping insertion in model container [2022-11-23 14:56:47,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:56:47" (3/3) ... [2022-11-23 14:56:47,718 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-1b.i [2022-11-23 14:56:47,727 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 14:56:47,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:56:47,739 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-23 14:56:47,739 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 14:56:47,819 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 14:56:47,853 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:56:47,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 196 transitions, 424 flow [2022-11-23 14:56:47,870 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 196 transitions, 424 flow [2022-11-23 14:56:47,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 196 transitions, 424 flow [2022-11-23 14:56:47,961 INFO L130 PetriNetUnfolder]: 2/192 cut-off events. [2022-11-23 14:56:47,962 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 14:56:47,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 192 events. 2/192 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 358 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 139. Up to 2 conditions per place. [2022-11-23 14:56:47,985 INFO L119 LiptonReduction]: Number of co-enabled transitions 13728 [2022-11-23 14:56:54,545 INFO L134 LiptonReduction]: Checked pairs total: 108332 [2022-11-23 14:56:54,545 INFO L136 LiptonReduction]: Total number of compositions: 161 [2022-11-23 14:56:54,557 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 106 places, 94 transitions, 220 flow [2022-11-23 14:57:06,403 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 298199 states, 290329 states have (on average 4.522961881176183) internal successors, (1313147), 298198 states have internal predecessors, (1313147), 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) [2022-11-23 14:57:06,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:57:06,481 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;@45562b0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:57:06,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-11-23 14:57:06,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 298199 states, 290329 states have (on average 4.522961881176183) internal successors, (1313147), 298198 states have internal predecessors, (1313147), 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) [2022-11-23 14:57:06,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:57:06,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:06,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:57:06,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting writerErr2ASSERT_VIOLATIONDATA_RACE === [readerErr0ASSERT_VIOLATIONDATA_RACE, readerErr1ASSERT_VIOLATIONDATA_RACE, readerErr2ASSERT_VIOLATIONDATA_RACE, readerErr3ASSERT_VIOLATIONDATA_RACE (and 46 more)] === [2022-11-23 14:57:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash 698566, now seen corresponding path program 1 times [2022-11-23 14:57:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:06,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839526833] [2022-11-23 14:57:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:06,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:07,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839526833] [2022-11-23 14:57:07,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839526833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:57:07,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:57:07,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:57:07,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611930046] [2022-11-23 14:57:07,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:57:07,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:57:07,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:57:07,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:57:07,760 INFO L87 Difference]: Start difference. First operand has 298199 states, 290329 states have (on average 4.522961881176183) internal successors, (1313147), 298198 states have internal predecessors, (1313147), 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) [2022-11-23 14:57:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:11,091 INFO L93 Difference]: Finished difference Result 75657 states and 311628 transitions. [2022-11-23 14:57:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:57:11,102 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 [2022-11-23 14:57:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:12,054 INFO L225 Difference]: With dead ends: 75657 [2022-11-23 14:57:12,055 INFO L226 Difference]: Without dead ends: 75610 [2022-11-23 14:57:12,056 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 [2022-11-23 14:57:12,063 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:12,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:57:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75610 states. [2022-11-23 14:57:16,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75610 to 75610. [2022-11-23 14:57:16,497 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) [2022-11-23 14:57:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75610 states to 75610 states and 311447 transitions. [2022-11-23 14:57:16,956 INFO L78 Accepts]: Start accepts. Automaton has 75610 states and 311447 transitions. Word has length 3 [2022-11-23 14:57:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:16,956 INFO L495 AbstractCegarLoop]: Abstraction has 75610 states and 311447 transitions. [2022-11-23 14:57:16,957 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) [2022-11-23 14:57:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 75610 states and 311447 transitions. [2022-11-23 14:57:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:57:16,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:16,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:57:16,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:57:16,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting writerErr3ASSERT_VIOLATIONDATA_RACE === [readerErr0ASSERT_VIOLATIONDATA_RACE, readerErr1ASSERT_VIOLATIONDATA_RACE, readerErr2ASSERT_VIOLATIONDATA_RACE, readerErr3ASSERT_VIOLATIONDATA_RACE (and 46 more)] === [2022-11-23 14:57:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash -663255588, now seen corresponding path program 1 times [2022-11-23 14:57:16,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:16,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961133357] [2022-11-23 14:57:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:16,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:17,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:17,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961133357] [2022-11-23 14:57:17,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961133357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:57:17,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:57:17,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:57:17,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938013974] [2022-11-23 14:57:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:57:17,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:57:17,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:57:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:57:17,094 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) [2022-11-23 14:57:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:18,669 INFO L93 Difference]: Finished difference Result 89240 states and 369503 transitions. [2022-11-23 14:57:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:57:18,670 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 [2022-11-23 14:57:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:19,433 INFO L225 Difference]: With dead ends: 89240 [2022-11-23 14:57:19,433 INFO L226 Difference]: Without dead ends: 89240 [2022-11-23 14:57:19,433 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 [2022-11-23 14:57:19,435 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:19,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 68 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:57:20,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89240 states. [2022-11-23 14:57:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89240 to 82404. [2022-11-23 14:57:23,304 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) [2022-11-23 14:57:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82404 states to 82404 states and 340389 transitions. [2022-11-23 14:57:24,563 INFO L78 Accepts]: Start accepts. Automaton has 82404 states and 340389 transitions. Word has length 6 [2022-11-23 14:57:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:24,574 INFO L495 AbstractCegarLoop]: Abstraction has 82404 states and 340389 transitions. [2022-11-23 14:57:24,574 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) [2022-11-23 14:57:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 82404 states and 340389 transitions. [2022-11-23 14:57:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:57:24,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:24,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:24,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:57:24,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr3ASSERT_VIOLATIONDATA_RACE === [readerErr0ASSERT_VIOLATIONDATA_RACE, readerErr1ASSERT_VIOLATIONDATA_RACE, readerErr2ASSERT_VIOLATIONDATA_RACE, readerErr3ASSERT_VIOLATIONDATA_RACE (and 46 more)] === [2022-11-23 14:57:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:24,578 INFO L85 PathProgramCache]: Analyzing trace with hash 955137674, now seen corresponding path program 1 times [2022-11-23 14:57:24,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:24,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468833444] [2022-11-23 14:57:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:24,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:24,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:24,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468833444] [2022-11-23 14:57:24,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468833444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:57:24,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:57:24,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:57:24,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335788607] [2022-11-23 14:57:24,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:57:24,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:57:24,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:57:24,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:57:24,732 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) [2022-11-23 14:57:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:27,029 INFO L93 Difference]: Finished difference Result 148368 states and 597866 transitions. [2022-11-23 14:57:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:57:27,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:57:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:28,036 INFO L225 Difference]: With dead ends: 148368 [2022-11-23 14:57:28,036 INFO L226 Difference]: Without dead ends: 148264 [2022-11-23 14:57:28,037 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 [2022-11-23 14:57:28,038 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:28,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 51 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:57:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148264 states. [2022-11-23 14:57:32,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148264 to 95168. [2022-11-23 14:57:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95168 states, 94944 states have (on average 4.117342854735423) internal successors, (390917), 95167 states have internal predecessors, (390917), 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) [2022-11-23 14:57:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95168 states to 95168 states and 390917 transitions. [2022-11-23 14:57:34,234 INFO L78 Accepts]: Start accepts. Automaton has 95168 states and 390917 transitions. Word has length 7 [2022-11-23 14:57:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:34,234 INFO L495 AbstractCegarLoop]: Abstraction has 95168 states and 390917 transitions. [2022-11-23 14:57:34,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 95168 states and 390917 transitions. [2022-11-23 14:57:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:57:34,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:34,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:34,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:57:34,248 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting writerErr4ASSERT_VIOLATIONDATA_RACE === [readerErr0ASSERT_VIOLATIONDATA_RACE, readerErr1ASSERT_VIOLATIONDATA_RACE, readerErr2ASSERT_VIOLATIONDATA_RACE, readerErr3ASSERT_VIOLATIONDATA_RACE (and 46 more)] === [2022-11-23 14:57:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:34,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2097882901, now seen corresponding path program 1 times [2022-11-23 14:57:34,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:34,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917327845] [2022-11-23 14:57:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:34,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:34,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917327845] [2022-11-23 14:57:34,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917327845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:57:34,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:57:34,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:57:34,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056893350] [2022-11-23 14:57:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:57:34,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:57:34,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:57:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:57:34,395 INFO L87 Difference]: Start difference. First operand 95168 states and 390917 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-11-23 14:57:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:36,352 INFO L93 Difference]: Finished difference Result 103114 states and 424427 transitions. [2022-11-23 14:57:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:57:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-11-23 14:57:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:37,182 INFO L225 Difference]: With dead ends: 103114 [2022-11-23 14:57:37,182 INFO L226 Difference]: Without dead ends: 102880 [2022-11-23 14:57:37,182 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 [2022-11-23 14:57:37,183 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 46 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:37,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 91 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:57:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102880 states. [2022-11-23 14:57:40,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102880 to 102880. [2022-11-23 14:57:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102880 states, 102656 states have (on average 4.1229738154613464) internal successors, (423248), 102879 states have internal predecessors, (423248), 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) [2022-11-23 14:57:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102880 states to 102880 states and 423248 transitions. [2022-11-23 14:57:41,521 INFO L78 Accepts]: Start accepts. Automaton has 102880 states and 423248 transitions. Word has length 9 [2022-11-23 14:57:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:41,522 INFO L495 AbstractCegarLoop]: Abstraction has 102880 states and 423248 transitions. [2022-11-23 14:57:41,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-11-23 14:57:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 102880 states and 423248 transitions. [2022-11-23 14:57:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:57:41,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:41,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:41,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:57:41,526 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting writerErr3ASSERT_VIOLATIONDATA_RACE === [readerErr0ASSERT_VIOLATIONDATA_RACE, readerErr1ASSERT_VIOLATIONDATA_RACE, readerErr2ASSERT_VIOLATIONDATA_RACE, readerErr3ASSERT_VIOLATIONDATA_RACE (and 46 more)] === [2022-11-23 14:57:41,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:41,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1244749289, now seen corresponding path program 1 times [2022-11-23 14:57:41,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:41,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243669070] [2022-11-23 14:57:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:41,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:41,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243669070] [2022-11-23 14:57:41,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243669070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:57:41,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:57:41,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:57:41,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705142196] [2022-11-23 14:57:41,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:57:41,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:57:41,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:57:41,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:57:41,653 INFO L87 Difference]: Start difference. First operand 102880 states and 423248 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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)