./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 8393723b 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_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 --- 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-8393723 [2022-11-18 20:55:20,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:55:20,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:55:21,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:55:21,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:55:21,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:55:21,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:55:21,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:55:21,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:55:21,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:55:21,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:55:21,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:55:21,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:55:21,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:55:21,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:55:21,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:55:21,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:55:21,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:55:21,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:55:21,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:55:21,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:55:21,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:55:21,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:55:21,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:55:21,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:55:21,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:55:21,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:55:21,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:55:21,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:55:21,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:55:21,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:55:21,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:55:21,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:55:21,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:55:21,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:55:21,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:55:21,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:55:21,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:55:21,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:55:21,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:55:21,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:55:21,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/config/svcomp-DataRace-32bit-Automizer_Default.epf [2022-11-18 20:55:21,141 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:55:21,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:55:21,142 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:55:21,142 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:55:21,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:55:21,143 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:55:21,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:55:21,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:55:21,144 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:55:21,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:55:21,145 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:55:21,145 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:55:21,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:55:21,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:55:21,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:55:21,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:55:21,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:55:21,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:55:21,147 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-11-18 20:55:21,148 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:55:21,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:55:21,148 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:55:21,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:55:21,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:55:21,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:55:21,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:55:21,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:55:21,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:55:21,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:55:21,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:55:21,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:55:21,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:55:21,152 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:55:21,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:55:21,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:55:21,154 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_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 [2022-11-18 20:55:21,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:55:21,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:55:21,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:55:21,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:55:21,488 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:55:21,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2022-11-18 20:55:21,580 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/data/87071b291/5c5fb09746ac444fa874557d02c49015/FLAGefe1a8101 [2022-11-18 20:55:22,137 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:55:22,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2022-11-18 20:55:22,152 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/data/87071b291/5c5fb09746ac444fa874557d02c49015/FLAGefe1a8101 [2022-11-18 20:55:22,432 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/data/87071b291/5c5fb09746ac444fa874557d02c49015 [2022-11-18 20:55:22,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:55:22,438 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:55:22,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:55:22,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:55:22,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:55:22,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:55:22" (1/1) ... [2022-11-18 20:55:22,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a3afca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:22, skipping insertion in model container [2022-11-18 20:55:22,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:55:22" (1/1) ... [2022-11-18 20:55:22,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:55:22,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:55:22,745 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-18 20:55:22,933 WARN L234 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_900a8057-4017-40ef-9d2e-7083a07dbdd1/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2022-11-18 20:55:22,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:55:22,955 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:55:22,983 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-18 20:55:23,014 WARN L234 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_900a8057-4017-40ef-9d2e-7083a07dbdd1/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2022-11-18 20:55:23,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:55:23,057 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:55:23,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23 WrapperNode [2022-11-18 20:55:23,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:55:23,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:55:23,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:55:23,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:55:23,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,125 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2022-11-18 20:55:23,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:55:23,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:55:23,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:55:23,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:55:23,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,147 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:55:23,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:55:23,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:55:23,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:55:23,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (1/1) ... [2022-11-18 20:55:23,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:55:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:23,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:55:23,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_900a8057-4017-40ef-9d2e-7083a07dbdd1/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:55:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-18 20:55:23,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-18 20:55:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:55:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:55:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:55:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:55:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:55:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:55:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:55:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:55:23,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:55:23,232 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:55:23,415 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:55:23,430 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:55:23,587 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:55:23,644 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:55:23,654 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:55:23,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:55:23 BoogieIcfgContainer [2022-11-18 20:55:23,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:55:23,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:55:23,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:55:23,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:55:23,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:55:22" (1/3) ... [2022-11-18 20:55:23,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eabdb69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:55:23, skipping insertion in model container [2022-11-18 20:55:23,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:23" (2/3) ... [2022-11-18 20:55:23,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eabdb69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:55:23, skipping insertion in model container [2022-11-18 20:55:23,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:55:23" (3/3) ... [2022-11-18 20:55:23,669 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2022-11-18 20:55:23,678 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:55:23,690 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:55:23,690 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-18 20:55:23,690 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:55:23,772 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:55:23,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 101 flow [2022-11-18 20:55:23,893 INFO L130 PetriNetUnfolder]: 2/59 cut-off events. [2022-11-18 20:55:23,897 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:55:23,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 59 events. 2/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 33. Up to 4 conditions per place. [2022-11-18 20:55:23,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 48 transitions, 101 flow [2022-11-18 20:55:23,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 48 transitions, 101 flow [2022-11-18 20:55:23,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:23,938 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=PETRI_NET, 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;@413f86ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:23,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 20:55:23,958 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2022-11-18 20:55:23,958 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:55:23,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:23,959 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:23,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:55:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1380502433, now seen corresponding path program 1 times [2022-11-18 20:55:23,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:23,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459552417] [2022-11-18 20:55:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:23,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:24,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:24,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459552417] [2022-11-18 20:55:24,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459552417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:24,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:24,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:24,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199742161] [2022-11-18 20:55:24,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:24,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:24,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:24,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 48 [2022-11-18 20:55:24,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2022-11-18 20:55:24,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:55:24,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 48 [2022-11-18 20:55:24,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:55:24,430 INFO L130 PetriNetUnfolder]: 0/42 cut-off events. [2022-11-18 20:55:24,431 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:55:24,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 42 events. 0/42 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 4/46 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-18 20:55:24,433 INFO L137 encePairwiseOnDemand]: 41/48 looper letters, 6 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-11-18 20:55:24,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 97 flow [2022-11-18 20:55:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:55:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2022-11-18 20:55:24,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8194444444444444 [2022-11-18 20:55:24,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2022-11-18 20:55:24,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2022-11-18 20:55:24,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:55:24,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2022-11-18 20:55:24,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2022-11-18 20:55:24,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2022-11-18 20:55:24,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2022-11-18 20:55:24,470 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 101 flow. Second operand 3 states and 118 transitions. [2022-11-18 20:55:24,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 97 flow [2022-11-18 20:55:24,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 97 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:55:24,478 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 85 flow [2022-11-18 20:55:24,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2022-11-18 20:55:24,485 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2022-11-18 20:55:24,486 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 85 flow [2022-11-18 20:55:24,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2022-11-18 20:55:24,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:24,487 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:24,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:55:24,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 20:55:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:24,489 INFO L85 PathProgramCache]: Analyzing trace with hash -555031820, now seen corresponding path program 1 times [2022-11-18 20:55:24,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:24,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451727089] [2022-11-18 20:55:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:24,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:24,545 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:55:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:24,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:55:24,599 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:55:24,601 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-18 20:55:24,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (4 of 6 remaining) [2022-11-18 20:55:24,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (3 of 6 remaining) [2022-11-18 20:55:24,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (2 of 6 remaining) [2022-11-18 20:55:24,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (1 of 6 remaining) [2022-11-18 20:55:24,605 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (0 of 6 remaining) [2022-11-18 20:55:24,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:55:24,605 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 20:55:24,608 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:55:24,608 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 20:55:24,627 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:55:24,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 132 flow [2022-11-18 20:55:24,657 INFO L130 PetriNetUnfolder]: 3/84 cut-off events. [2022-11-18 20:55:24,658 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:55:24,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 84 events. 3/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2022-11-18 20:55:24,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 132 flow [2022-11-18 20:55:24,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 60 transitions, 132 flow [2022-11-18 20:55:24,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:24,667 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=PETRI_NET, 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;@413f86ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:24,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-18 20:55:24,671 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2022-11-18 20:55:24,671 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:55:24,672 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:24,672 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:24,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 20:55:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1225521119, now seen corresponding path program 1 times [2022-11-18 20:55:24,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:24,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937037794] [2022-11-18 20:55:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:24,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:24,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:24,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937037794] [2022-11-18 20:55:24,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937037794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:24,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:24,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:24,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620812776] [2022-11-18 20:55:24,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:24,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:24,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:24,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:24,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 60 [2022-11-18 20:55:24,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2022-11-18 20:55:24,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:55:24,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 60 [2022-11-18 20:55:24,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:55:24,754 INFO L130 PetriNetUnfolder]: 6/78 cut-off events. [2022-11-18 20:55:24,755 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-18 20:55:24,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 78 events. 6/78 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 131 event pairs, 6 based on Foata normal form. 13/91 useless extension candidates. Maximal degree in co-relation 50. Up to 22 conditions per place. [2022-11-18 20:55:24,756 INFO L137 encePairwiseOnDemand]: 51/60 looper letters, 9 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2022-11-18 20:55:24,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 130 flow [2022-11-18 20:55:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:55:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2022-11-18 20:55:24,760 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-11-18 20:55:24,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2022-11-18 20:55:24,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2022-11-18 20:55:24,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:55:24,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2022-11-18 20:55:24,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2022-11-18 20:55:24,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2022-11-18 20:55:24,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2022-11-18 20:55:24,769 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 132 flow. Second operand 3 states and 144 transitions. [2022-11-18 20:55:24,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 130 flow [2022-11-18 20:55:24,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 48 transitions, 128 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-18 20:55:24,773 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 110 flow [2022-11-18 20:55:24,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2022-11-18 20:55:24,776 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -9 predicate places. [2022-11-18 20:55:24,776 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 110 flow [2022-11-18 20:55:24,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2022-11-18 20:55:24,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:24,777 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:24,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:55:24,779 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 20:55:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2025701086, now seen corresponding path program 1 times [2022-11-18 20:55:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:24,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471709394] [2022-11-18 20:55:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:24,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:24,829 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:55:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:24,857 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:55:24,860 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:55:24,860 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-18 20:55:24,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (6 of 8 remaining) [2022-11-18 20:55:24,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (5 of 8 remaining) [2022-11-18 20:55:24,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (4 of 8 remaining) [2022-11-18 20:55:24,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (3 of 8 remaining) [2022-11-18 20:55:24,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (2 of 8 remaining) [2022-11-18 20:55:24,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (1 of 8 remaining) [2022-11-18 20:55:24,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (0 of 8 remaining) [2022-11-18 20:55:24,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:55:24,863 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 20:55:24,863 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:55:24,864 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 20:55:24,907 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:55:24,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 72 transitions, 165 flow [2022-11-18 20:55:24,934 INFO L130 PetriNetUnfolder]: 4/109 cut-off events. [2022-11-18 20:55:24,942 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 20:55:24,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 109 events. 4/109 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 177 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 88. Up to 8 conditions per place. [2022-11-18 20:55:24,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 72 transitions, 165 flow [2022-11-18 20:55:24,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 165 flow [2022-11-18 20:55:24,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:24,947 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=PETRI_NET, 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;@413f86ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:24,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-18 20:55:24,951 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2022-11-18 20:55:24,951 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:55:24,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:24,951 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:24,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-18 20:55:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1660204833, now seen corresponding path program 1 times [2022-11-18 20:55:24,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:24,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543580782] [2022-11-18 20:55:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:24,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:25,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:25,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543580782] [2022-11-18 20:55:25,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543580782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:25,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:25,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:25,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759548216] [2022-11-18 20:55:25,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:25,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:25,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:25,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:25,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:25,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 72 [2022-11-18 20:55:25,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2022-11-18 20:55:25,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:55:25,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 72 [2022-11-18 20:55:25,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:55:25,136 INFO L130 PetriNetUnfolder]: 42/186 cut-off events. [2022-11-18 20:55:25,144 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-11-18 20:55:25,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 186 events. 42/186 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 695 event pairs, 42 based on Foata normal form. 40/226 useless extension candidates. Maximal degree in co-relation 163. Up to 85 conditions per place. [2022-11-18 20:55:25,147 INFO L137 encePairwiseOnDemand]: 61/72 looper letters, 12 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-11-18 20:55:25,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 165 flow [2022-11-18 20:55:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:55:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2022-11-18 20:55:25,153 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7870370370370371 [2022-11-18 20:55:25,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2022-11-18 20:55:25,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2022-11-18 20:55:25,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:55:25,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2022-11-18 20:55:25,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2022-11-18 20:55:25,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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) [2022-11-18 20:55:25,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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) [2022-11-18 20:55:25,158 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 165 flow. Second operand 3 states and 170 transitions. [2022-11-18 20:55:25,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 165 flow [2022-11-18 20:55:25,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 159 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-18 20:55:25,162 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 135 flow [2022-11-18 20:55:25,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2022-11-18 20:55:25,164 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, -11 predicate places. [2022-11-18 20:55:25,166 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 135 flow [2022-11-18 20:55:25,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2022-11-18 20:55:25,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:25,167 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:25,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:55:25,168 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-18 20:55:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:25,169 INFO L85 PathProgramCache]: Analyzing trace with hash -940962185, now seen corresponding path program 1 times [2022-11-18 20:55:25,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:25,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583565774] [2022-11-18 20:55:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:25,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:25,206 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:55:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:25,236 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:55:25,239 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:55:25,240 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-11-18 20:55:25,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (8 of 10 remaining) [2022-11-18 20:55:25,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (7 of 10 remaining) [2022-11-18 20:55:25,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (6 of 10 remaining) [2022-11-18 20:55:25,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 10 remaining) [2022-11-18 20:55:25,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 10 remaining) [2022-11-18 20:55:25,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (3 of 10 remaining) [2022-11-18 20:55:25,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (2 of 10 remaining) [2022-11-18 20:55:25,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (1 of 10 remaining) [2022-11-18 20:55:25,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (0 of 10 remaining) [2022-11-18 20:55:25,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:55:25,243 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 20:55:25,243 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:55:25,243 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 20:55:25,268 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:55:25,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 84 transitions, 200 flow [2022-11-18 20:55:25,290 INFO L130 PetriNetUnfolder]: 5/134 cut-off events. [2022-11-18 20:55:25,290 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-18 20:55:25,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 134 events. 5/134 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 241 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 117. Up to 10 conditions per place. [2022-11-18 20:55:25,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 84 transitions, 200 flow [2022-11-18 20:55:25,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 84 transitions, 200 flow [2022-11-18 20:55:25,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:25,294 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=PETRI_NET, 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;@413f86ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:25,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-18 20:55:25,297 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2022-11-18 20:55:25,297 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:55:25,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:25,298 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:25,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-11-18 20:55:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:25,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1447745697, now seen corresponding path program 1 times [2022-11-18 20:55:25,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:25,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782571592] [2022-11-18 20:55:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:25,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:25,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:25,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782571592] [2022-11-18 20:55:25,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782571592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:25,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:25,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:25,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443902232] [2022-11-18 20:55:25,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:25,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:25,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:25,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:25,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:25,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 84 [2022-11-18 20:55:25,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2022-11-18 20:55:25,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:55:25,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 84 [2022-11-18 20:55:25,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:55:25,461 INFO L130 PetriNetUnfolder]: 204/546 cut-off events. [2022-11-18 20:55:25,461 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2022-11-18 20:55:25,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 546 events. 204/546 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2978 event pairs, 204 based on Foata normal form. 121/667 useless extension candidates. Maximal degree in co-relation 564. Up to 328 conditions per place. [2022-11-18 20:55:25,472 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 15 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2022-11-18 20:55:25,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 68 transitions, 202 flow [2022-11-18 20:55:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:55:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2022-11-18 20:55:25,474 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-11-18 20:55:25,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2022-11-18 20:55:25,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2022-11-18 20:55:25,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:55:25,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2022-11-18 20:55:25,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2022-11-18 20:55:25,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 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) [2022-11-18 20:55:25,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 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) [2022-11-18 20:55:25,477 INFO L175 Difference]: Start difference. First operand has 92 places, 84 transitions, 200 flow. Second operand 3 states and 196 transitions. [2022-11-18 20:55:25,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 68 transitions, 202 flow [2022-11-18 20:55:25,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 68 transitions, 190 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-18 20:55:25,481 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 160 flow [2022-11-18 20:55:25,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2022-11-18 20:55:25,483 INFO L288 CegarLoopForPetriNet]: 92 programPoint places, -13 predicate places. [2022-11-18 20:55:25,484 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 160 flow [2022-11-18 20:55:25,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2022-11-18 20:55:25,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:25,484 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:25,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:55:25,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-11-18 20:55:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:25,487 INFO L85 PathProgramCache]: Analyzing trace with hash -229630285, now seen corresponding path program 1 times [2022-11-18 20:55:25,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:25,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919840164] [2022-11-18 20:55:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:25,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:25,556 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:55:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:25,576 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:55:25,576 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:55:25,576 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 12 remaining) [2022-11-18 20:55:25,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (10 of 12 remaining) [2022-11-18 20:55:25,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (9 of 12 remaining) [2022-11-18 20:55:25,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (8 of 12 remaining) [2022-11-18 20:55:25,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (7 of 12 remaining) [2022-11-18 20:55:25,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (6 of 12 remaining) [2022-11-18 20:55:25,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 12 remaining) [2022-11-18 20:55:25,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 12 remaining) [2022-11-18 20:55:25,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (3 of 12 remaining) [2022-11-18 20:55:25,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (2 of 12 remaining) [2022-11-18 20:55:25,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (1 of 12 remaining) [2022-11-18 20:55:25,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (0 of 12 remaining) [2022-11-18 20:55:25,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:55:25,580 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 20:55:25,580 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:55:25,580 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-18 20:55:25,606 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:55:25,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 96 transitions, 237 flow [2022-11-18 20:55:25,634 INFO L130 PetriNetUnfolder]: 6/159 cut-off events. [2022-11-18 20:55:25,634 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 20:55:25,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 159 events. 6/159 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 294 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 147. Up to 12 conditions per place. [2022-11-18 20:55:25,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 96 transitions, 237 flow [2022-11-18 20:55:25,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 96 transitions, 237 flow [2022-11-18 20:55:25,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:25,639 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=PETRI_NET, 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;@413f86ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:25,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-18 20:55:25,642 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2022-11-18 20:55:25,642 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:55:25,642 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:25,643 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:25,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2022-11-18 20:55:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1862898527, now seen corresponding path program 1 times [2022-11-18 20:55:25,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:25,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752472563] [2022-11-18 20:55:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:25,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:25,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752472563] [2022-11-18 20:55:25,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752472563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:25,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:25,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:25,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952326462] [2022-11-18 20:55:25,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:25,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:25,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:25,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:25,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 96 [2022-11-18 20:55:25,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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) [2022-11-18 20:55:25,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:55:25,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 96 [2022-11-18 20:55:25,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:55:26,106 INFO L130 PetriNetUnfolder]: 852/1770 cut-off events. [2022-11-18 20:55:26,106 INFO L131 PetriNetUnfolder]: For 1559/1559 co-relation queries the response was YES. [2022-11-18 20:55:26,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3670 conditions, 1770 events. 852/1770 cut-off events. For 1559/1559 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11531 event pairs, 852 based on Foata normal form. 364/2134 useless extension candidates. Maximal degree in co-relation 1973. Up to 1219 conditions per place. [2022-11-18 20:55:26,130 INFO L137 encePairwiseOnDemand]: 81/96 looper letters, 18 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-11-18 20:55:26,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 78 transitions, 241 flow [2022-11-18 20:55:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:55:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2022-11-18 20:55:26,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7708333333333334 [2022-11-18 20:55:26,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2022-11-18 20:55:26,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2022-11-18 20:55:26,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:55:26,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2022-11-18 20:55:26,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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) [2022-11-18 20:55:26,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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) [2022-11-18 20:55:26,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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) [2022-11-18 20:55:26,138 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 237 flow. Second operand 3 states and 222 transitions. [2022-11-18 20:55:26,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 78 transitions, 241 flow [2022-11-18 20:55:26,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 78 transitions, 221 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-18 20:55:26,144 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 185 flow [2022-11-18 20:55:26,145 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2022-11-18 20:55:26,147 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -15 predicate places. [2022-11-18 20:55:26,147 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 185 flow [2022-11-18 20:55:26,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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) [2022-11-18 20:55:26,147 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:26,148 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:26,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:55:26,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2022-11-18 20:55:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:26,151 INFO L85 PathProgramCache]: Analyzing trace with hash -133187158, now seen corresponding path program 1 times [2022-11-18 20:55:26,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:26,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268338811] [2022-11-18 20:55:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:26,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:26,199 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:55:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:26,230 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:55:26,231 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:55:26,231 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2022-11-18 20:55:26,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (12 of 14 remaining) [2022-11-18 20:55:26,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (11 of 14 remaining) [2022-11-18 20:55:26,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (10 of 14 remaining) [2022-11-18 20:55:26,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (9 of 14 remaining) [2022-11-18 20:55:26,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (8 of 14 remaining) [2022-11-18 20:55:26,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (7 of 14 remaining) [2022-11-18 20:55:26,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (6 of 14 remaining) [2022-11-18 20:55:26,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 14 remaining) [2022-11-18 20:55:26,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 14 remaining) [2022-11-18 20:55:26,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (3 of 14 remaining) [2022-11-18 20:55:26,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (2 of 14 remaining) [2022-11-18 20:55:26,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (1 of 14 remaining) [2022-11-18 20:55:26,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (0 of 14 remaining) [2022-11-18 20:55:26,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:55:26,234 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 20:55:26,234 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:55:26,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-18 20:55:26,281 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:55:26,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 108 transitions, 276 flow [2022-11-18 20:55:26,338 INFO L130 PetriNetUnfolder]: 7/184 cut-off events. [2022-11-18 20:55:26,339 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-18 20:55:26,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 184 events. 7/184 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 372 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 178. Up to 14 conditions per place. [2022-11-18 20:55:26,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 108 transitions, 276 flow [2022-11-18 20:55:26,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 108 transitions, 276 flow [2022-11-18 20:55:26,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:26,344 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=PETRI_NET, 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;@413f86ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:26,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-11-18 20:55:26,346 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2022-11-18 20:55:26,346 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:55:26,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:26,346 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:26,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-11-18 20:55:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash -318206753, now seen corresponding path program 1 times [2022-11-18 20:55:26,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:26,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131382864] [2022-11-18 20:55:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:26,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:26,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:26,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131382864] [2022-11-18 20:55:26,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131382864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:26,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:26,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:26,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900521675] [2022-11-18 20:55:26,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:26,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:26,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:26,384 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 108 [2022-11-18 20:55:26,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 108 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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) [2022-11-18 20:55:26,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:55:26,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 108 [2022-11-18 20:55:26,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:55:27,795 INFO L130 PetriNetUnfolder]: 3282/5910 cut-off events. [2022-11-18 20:55:27,795 INFO L131 PetriNetUnfolder]: For 6667/6667 co-relation queries the response was YES. [2022-11-18 20:55:27,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12672 conditions, 5910 events. 3282/5910 cut-off events. For 6667/6667 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43378 event pairs, 3282 based on Foata normal form. 1093/7003 useless extension candidates. Maximal degree in co-relation 6838. Up to 4378 conditions per place. [2022-11-18 20:55:27,869 INFO L137 encePairwiseOnDemand]: 91/108 looper letters, 21 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2022-11-18 20:55:27,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 88 transitions, 282 flow [2022-11-18 20:55:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:55:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2022-11-18 20:55:27,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7654320987654321 [2022-11-18 20:55:27,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2022-11-18 20:55:27,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2022-11-18 20:55:27,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:55:27,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2022-11-18 20:55:27,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2022-11-18 20:55:27,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2022-11-18 20:55:27,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2022-11-18 20:55:27,875 INFO L175 Difference]: Start difference. First operand has 120 places, 108 transitions, 276 flow. Second operand 3 states and 248 transitions. [2022-11-18 20:55:27,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 88 transitions, 282 flow [2022-11-18 20:55:27,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 88 transitions, 252 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-18 20:55:27,884 INFO L231 Difference]: Finished difference. Result has 103 places, 88 transitions, 210 flow [2022-11-18 20:55:27,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=103, PETRI_TRANSITIONS=88} [2022-11-18 20:55:27,886 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, -17 predicate places. [2022-11-18 20:55:27,886 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 88 transitions, 210 flow [2022-11-18 20:55:27,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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) [2022-11-18 20:55:27,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:27,887 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:27,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:55:27,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-11-18 20:55:27,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash -933410552, now seen corresponding path program 1 times [2022-11-18 20:55:27,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:27,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831238966] [2022-11-18 20:55:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:27,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:27,928 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:55:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:27,947 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:55:27,947 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:55:27,948 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2022-11-18 20:55:27,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (14 of 16 remaining) [2022-11-18 20:55:27,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (13 of 16 remaining) [2022-11-18 20:55:27,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (12 of 16 remaining) [2022-11-18 20:55:27,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (11 of 16 remaining) [2022-11-18 20:55:27,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 16 remaining) [2022-11-18 20:55:27,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (9 of 16 remaining) [2022-11-18 20:55:27,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (8 of 16 remaining) [2022-11-18 20:55:27,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (7 of 16 remaining) [2022-11-18 20:55:27,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (6 of 16 remaining) [2022-11-18 20:55:27,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 16 remaining) [2022-11-18 20:55:27,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 16 remaining) [2022-11-18 20:55:27,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (3 of 16 remaining) [2022-11-18 20:55:27,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (2 of 16 remaining) [2022-11-18 20:55:27,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (1 of 16 remaining) [2022-11-18 20:55:27,950 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (0 of 16 remaining) [2022-11-18 20:55:27,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 20:55:27,951 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 20:55:27,951 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:55:27,952 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-18 20:55:27,978 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:55:27,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 120 transitions, 317 flow [2022-11-18 20:55:28,005 INFO L130 PetriNetUnfolder]: 8/209 cut-off events. [2022-11-18 20:55:28,005 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-18 20:55:28,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 209 events. 8/209 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 449 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 210. Up to 16 conditions per place. [2022-11-18 20:55:28,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 120 transitions, 317 flow [2022-11-18 20:55:28,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 120 transitions, 317 flow [2022-11-18 20:55:28,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:28,009 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=PETRI_NET, 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;@413f86ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:28,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-18 20:55:28,011 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2022-11-18 20:55:28,011 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:55:28,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:28,011 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:28,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2022-11-18 20:55:28,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:28,012 INFO L85 PathProgramCache]: Analyzing trace with hash 598873055, now seen corresponding path program 1 times [2022-11-18 20:55:28,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:28,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3473022] [2022-11-18 20:55:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:28,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:28,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:28,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3473022] [2022-11-18 20:55:28,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3473022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:28,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:28,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:28,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661840306] [2022-11-18 20:55:28,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:28,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:28,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:28,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:28,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:28,034 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 120 [2022-11-18 20:55:28,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 120 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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) [2022-11-18 20:55:28,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:55:28,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 120 [2022-11-18 20:55:28,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:55:32,313 INFO L130 PetriNetUnfolder]: 12030/19770 cut-off events. [2022-11-18 20:55:32,313 INFO L131 PetriNetUnfolder]: For 27085/27085 co-relation queries the response was YES. [2022-11-18 20:55:32,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43301 conditions, 19770 events. 12030/19770 cut-off events. For 27085/27085 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 155041 event pairs, 12030 based on Foata normal form. 3280/23050 useless extension candidates. Maximal degree in co-relation 23367. Up to 15313 conditions per place. [2022-11-18 20:55:32,590 INFO L137 encePairwiseOnDemand]: 101/120 looper letters, 24 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2022-11-18 20:55:32,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 98 transitions, 325 flow [2022-11-18 20:55:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:55:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2022-11-18 20:55:32,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7611111111111111 [2022-11-18 20:55:32,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2022-11-18 20:55:32,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2022-11-18 20:55:32,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:55:32,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2022-11-18 20:55:32,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2022-11-18 20:55:32,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 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) [2022-11-18 20:55:32,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 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) [2022-11-18 20:55:32,596 INFO L175 Difference]: Start difference. First operand has 134 places, 120 transitions, 317 flow. Second operand 3 states and 274 transitions. [2022-11-18 20:55:32,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 98 transitions, 325 flow [2022-11-18 20:55:32,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 98 transitions, 283 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-18 20:55:32,614 INFO L231 Difference]: Finished difference. Result has 115 places, 98 transitions, 235 flow [2022-11-18 20:55:32,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=115, PETRI_TRANSITIONS=98} [2022-11-18 20:55:32,615 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, -19 predicate places. [2022-11-18 20:55:32,615 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 98 transitions, 235 flow [2022-11-18 20:55:32,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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) [2022-11-18 20:55:32,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:32,617 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:32,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:55:32,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 14 more)] === [2022-11-18 20:55:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:32,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1370098035, now seen corresponding path program 1 times [2022-11-18 20:55:32,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:32,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233467593] [2022-11-18 20:55:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:32,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:32,643 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:55:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:32,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:55:32,663 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:55:32,663 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2022-11-18 20:55:32,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (16 of 18 remaining) [2022-11-18 20:55:32,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (15 of 18 remaining) [2022-11-18 20:55:32,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (14 of 18 remaining) [2022-11-18 20:55:32,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (13 of 18 remaining) [2022-11-18 20:55:32,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (12 of 18 remaining) [2022-11-18 20:55:32,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (11 of 18 remaining) [2022-11-18 20:55:32,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 18 remaining) [2022-11-18 20:55:32,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (9 of 18 remaining) [2022-11-18 20:55:32,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (8 of 18 remaining) [2022-11-18 20:55:32,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (7 of 18 remaining) [2022-11-18 20:55:32,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (6 of 18 remaining) [2022-11-18 20:55:32,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 18 remaining) [2022-11-18 20:55:32,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 18 remaining) [2022-11-18 20:55:32,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (3 of 18 remaining) [2022-11-18 20:55:32,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (2 of 18 remaining) [2022-11-18 20:55:32,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (1 of 18 remaining) [2022-11-18 20:55:32,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (0 of 18 remaining) [2022-11-18 20:55:32,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 20:55:32,667 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 20:55:32,668 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:55:32,668 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-18 20:55:32,710 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:55:32,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 132 transitions, 360 flow [2022-11-18 20:55:32,740 INFO L130 PetriNetUnfolder]: 9/234 cut-off events. [2022-11-18 20:55:32,740 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-18 20:55:32,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 234 events. 9/234 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 511 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 243. Up to 18 conditions per place. [2022-11-18 20:55:32,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 132 transitions, 360 flow [2022-11-18 20:55:32,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 132 transitions, 360 flow [2022-11-18 20:55:32,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:32,745 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=PETRI_NET, 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;@413f86ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:32,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-18 20:55:32,747 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2022-11-18 20:55:32,747 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:55:32,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:32,748 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:32,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-18 20:55:32,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:32,748 INFO L85 PathProgramCache]: Analyzing trace with hash 319170655, now seen corresponding path program 1 times [2022-11-18 20:55:32,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:32,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392973930] [2022-11-18 20:55:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:32,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:32,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392973930] [2022-11-18 20:55:32,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392973930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:32,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:32,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:32,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653943262] [2022-11-18 20:55:32,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:32,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:32,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:32,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:32,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:32,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 132 [2022-11-18 20:55:32,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 132 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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) [2022-11-18 20:55:32,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:55:32,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 132 [2022-11-18 20:55:32,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:55:42,915 INFO L130 PetriNetUnfolder]: 42648/65706 cut-off events. [2022-11-18 20:55:42,915 INFO L131 PetriNetUnfolder]: For 105824/105824 co-relation queries the response was YES. [2022-11-18 20:55:43,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146101 conditions, 65706 events. 42648/65706 cut-off events. For 105824/105824 co-relation queries the response was YES. Maximal size of possible extension queue 2912. Compared 543504 event pairs, 42648 based on Foata normal form. 9841/75547 useless extension candidates. Maximal degree in co-relation 78776. Up to 52492 conditions per place. [2022-11-18 20:55:44,335 INFO L137 encePairwiseOnDemand]: 111/132 looper letters, 27 selfloop transitions, 2 changer transitions 0/108 dead transitions. [2022-11-18 20:55:44,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 108 transitions, 370 flow [2022-11-18 20:55:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:55:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2022-11-18 20:55:44,337 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2022-11-18 20:55:44,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2022-11-18 20:55:44,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2022-11-18 20:55:44,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:55:44,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2022-11-18 20:55:44,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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) [2022-11-18 20:55:44,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 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) [2022-11-18 20:55:44,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 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) [2022-11-18 20:55:44,341 INFO L175 Difference]: Start difference. First operand has 148 places, 132 transitions, 360 flow. Second operand 3 states and 300 transitions. [2022-11-18 20:55:44,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 108 transitions, 370 flow [2022-11-18 20:55:44,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 108 transitions, 314 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-18 20:55:44,397 INFO L231 Difference]: Finished difference. Result has 127 places, 108 transitions, 260 flow [2022-11-18 20:55:44,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=127, PETRI_TRANSITIONS=108} [2022-11-18 20:55:44,399 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, -21 predicate places. [2022-11-18 20:55:44,399 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 108 transitions, 260 flow [2022-11-18 20:55:44,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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) [2022-11-18 20:55:44,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:44,400 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:44,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 20:55:44,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-18 20:55:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:44,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1469666339, now seen corresponding path program 1 times [2022-11-18 20:55:44,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:44,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831742655] [2022-11-18 20:55:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:44,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:44,427 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:55:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:55:44,452 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:55:44,452 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:55:44,452 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (19 of 20 remaining) [2022-11-18 20:55:44,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (18 of 20 remaining) [2022-11-18 20:55:44,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (17 of 20 remaining) [2022-11-18 20:55:44,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (16 of 20 remaining) [2022-11-18 20:55:44,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (15 of 20 remaining) [2022-11-18 20:55:44,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (14 of 20 remaining) [2022-11-18 20:55:44,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (13 of 20 remaining) [2022-11-18 20:55:44,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (12 of 20 remaining) [2022-11-18 20:55:44,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (11 of 20 remaining) [2022-11-18 20:55:44,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (10 of 20 remaining) [2022-11-18 20:55:44,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (9 of 20 remaining) [2022-11-18 20:55:44,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (8 of 20 remaining) [2022-11-18 20:55:44,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (7 of 20 remaining) [2022-11-18 20:55:44,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (6 of 20 remaining) [2022-11-18 20:55:44,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (5 of 20 remaining) [2022-11-18 20:55:44,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (4 of 20 remaining) [2022-11-18 20:55:44,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (3 of 20 remaining) [2022-11-18 20:55:44,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (2 of 20 remaining) [2022-11-18 20:55:44,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (1 of 20 remaining) [2022-11-18 20:55:44,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (0 of 20 remaining) [2022-11-18 20:55:44,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 20:55:44,457 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 20:55:44,458 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:55:44,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-18 20:55:44,498 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:55:44,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 144 transitions, 405 flow [2022-11-18 20:55:44,541 INFO L130 PetriNetUnfolder]: 10/259 cut-off events. [2022-11-18 20:55:44,542 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-18 20:55:44,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 259 events. 10/259 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 573 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 277. Up to 20 conditions per place. [2022-11-18 20:55:44,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 144 transitions, 405 flow [2022-11-18 20:55:44,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 144 transitions, 405 flow [2022-11-18 20:55:44,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:44,548 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=PETRI_NET, 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;@413f86ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:44,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-18 20:55:44,550 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2022-11-18 20:55:44,550 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:55:44,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:55:44,551 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:44,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 18 more)] === [2022-11-18 20:55:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1157313953, now seen corresponding path program 1 times [2022-11-18 20:55:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:44,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251409327] [2022-11-18 20:55:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:44,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:44,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:44,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251409327] [2022-11-18 20:55:44,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251409327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:44,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:44,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:44,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704063391] [2022-11-18 20:55:44,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:44,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:44,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:44,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:44,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:44,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 144 [2022-11-18 20:55:44,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 144 transitions, 405 flow. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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) [2022-11-18 20:55:44,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:55:44,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 144 [2022-11-18 20:55:44,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand