./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/reorder_c11_good-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-deagle/reorder_c11_good-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 053c2020ab3922d27be669eca0e75ac8051424727a4d2b2d1ab69540cc43f0a3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:31:04,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:31:04,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:31:04,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:31:04,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:31:04,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:31:04,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:31:04,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:31:04,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:31:04,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:31:04,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:31:04,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:31:04,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:31:04,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:31:04,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:31:04,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:31:04,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:31:04,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:31:04,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:31:04,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:31:04,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:31:04,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:31:04,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:31:04,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:31:04,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:31:04,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:31:04,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:31:04,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:31:04,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:31:04,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:31:04,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:31:04,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:31:04,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:31:04,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:31:04,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:31:04,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:31:04,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:31:04,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:31:04,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:31:04,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:31:04,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:31:04,903 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:31:04,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:31:04,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:31:04,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:31:04,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:31:04,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:31:04,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:31:04,934 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:31:04,934 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:31:04,935 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:31:04,935 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:31:04,936 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:31:04,936 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:31:04,937 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:31:04,937 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:31:04,937 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:31:04,938 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:31:04,938 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:31:04,939 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:31:04,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:31:04,940 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:31:04,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:31:04,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:31:04,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:31:04,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:31:04,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:31:04,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:31:04,943 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:31:04,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:31:04,944 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:31:04,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:31:04,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:31:04,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:31:04,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:31:04,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:31:04,947 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:31:04,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:31:04,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:31:04,949 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:31:04,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:31:04,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:31:04,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:31:04,951 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_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 053c2020ab3922d27be669eca0e75ac8051424727a4d2b2d1ab69540cc43f0a3 [2022-11-23 15:31:05,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:31:05,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:31:05,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:31:05,349 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:31:05,350 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:31:05,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/pthread-deagle/reorder_c11_good-10.i [2022-11-23 15:31:08,849 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:31:09,270 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:31:09,275 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/sv-benchmarks/c/pthread-deagle/reorder_c11_good-10.i [2022-11-23 15:31:09,297 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/data/41a3c1bdb/8c10843aa86c45919fc1d1ba4df9bb5e/FLAG09e2b7d0d [2022-11-23 15:31:09,320 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/data/41a3c1bdb/8c10843aa86c45919fc1d1ba4df9bb5e [2022-11-23 15:31:09,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:31:09,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:31:09,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:31:09,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:31:09,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:31:09,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d438737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:09, skipping insertion in model container [2022-11-23 15:31:09,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:09" (1/1) ... [2022-11-23 15:31:09,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:31:09,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:31:09,906 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/sv-benchmarks/c/pthread-deagle/reorder_c11_good-10.i[30195,30208] [2022-11-23 15:31:09,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:31:09,937 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:31:09,986 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/sv-benchmarks/c/pthread-deagle/reorder_c11_good-10.i[30195,30208] [2022-11-23 15:31:09,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:31:10,036 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:31:10,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10 WrapperNode [2022-11-23 15:31:10,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:31:10,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:31:10,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:31:10,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:31:10,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,086 INFO L138 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-11-23 15:31:10,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:31:10,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:31:10,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:31:10,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:31:10,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,118 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:31:10,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:31:10,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:31:10,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:31:10,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (1/1) ... [2022-11-23 15:31:10,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:31:10,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:10,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:31:10,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec57a921-dffe-4d6d-abc4-16714e389cd2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:31:10,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:31:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-11-23 15:31:10,260 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-11-23 15:31:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:31:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 15:31:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:31:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:31:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:31:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-11-23 15:31:10,261 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-11-23 15:31:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:31:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 15:31:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:31:10,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:31:10,264 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 15:31:10,418 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:31:10,436 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:31:10,708 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:31:10,716 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:31:10,716 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-23 15:31:10,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:10 BoogieIcfgContainer [2022-11-23 15:31:10,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:31:10,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:31:10,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:31:10,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:31:10,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:31:09" (1/3) ... [2022-11-23 15:31:10,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cec447e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:10, skipping insertion in model container [2022-11-23 15:31:10,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:10" (2/3) ... [2022-11-23 15:31:10,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cec447e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:10, skipping insertion in model container [2022-11-23 15:31:10,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:10" (3/3) ... [2022-11-23 15:31:10,730 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_c11_good-10.i [2022-11-23 15:31:10,741 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 15:31:10,755 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:31:10,756 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:31:10,758 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 15:31:10,885 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 15:31:10,935 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:31:10,950 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 91 transitions, 204 flow [2022-11-23 15:31:10,954 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 91 transitions, 204 flow [2022-11-23 15:31:10,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 91 transitions, 204 flow [2022-11-23 15:31:11,049 INFO L130 PetriNetUnfolder]: 24/202 cut-off events. [2022-11-23 15:31:11,049 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-23 15:31:11,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 202 events. 24/202 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 623 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2022-11-23 15:31:11,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 1234 [2022-11-23 15:31:14,001 INFO L134 LiptonReduction]: Checked pairs total: 1539 [2022-11-23 15:31:14,001 INFO L136 LiptonReduction]: Total number of compositions: 74 [2022-11-23 15:31:14,022 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 26 transitions, 74 flow [2022-11-23 15:31:14,064 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 91 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 90 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:31:14,109 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@da5498c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:31:14,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 15:31:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 90 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:31:14,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:14,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:31:14,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 15:31:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:14,131 INFO L85 PathProgramCache]: Analyzing trace with hash 323464696, now seen corresponding path program 1 times [2022-11-23 15:31:14,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:14,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589443556] [2022-11-23 15:31:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:14,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:14,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589443556] [2022-11-23 15:31:14,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589443556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:14,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:14,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:31:14,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386029730] [2022-11-23 15:31:14,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:14,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:14,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:14,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:14,490 INFO L87 Difference]: Start difference. First operand has 91 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 90 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:14,564 INFO L93 Difference]: Finished difference Result 41 states and 61 transitions. [2022-11-23 15:31:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:14,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:31:14,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:14,576 INFO L225 Difference]: With dead ends: 41 [2022-11-23 15:31:14,577 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 15:31:14,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:14,582 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:14,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 5 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 15:31:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 15:31:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 49 transitions. [2022-11-23 15:31:14,624 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 49 transitions. Word has length 5 [2022-11-23 15:31:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:14,625 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 49 transitions. [2022-11-23 15:31:14,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:14,626 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 49 transitions. [2022-11-23 15:31:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:31:14,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:14,627 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 15:31:14,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:31:14,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 15:31:14,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:14,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1449424503, now seen corresponding path program 1 times [2022-11-23 15:31:14,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:14,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831086479] [2022-11-23 15:31:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:14,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:31:14,681 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:31:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:31:14,720 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:31:14,721 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:31:14,723 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-23 15:31:14,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-23 15:31:14,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-23 15:31:14,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-23 15:31:14,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:31:14,730 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 15:31:14,732 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 15:31:14,733 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 15:31:14,760 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-23 15:31:14,763 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:31:14,764 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 110 transitions, 268 flow [2022-11-23 15:31:14,764 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 110 transitions, 268 flow [2022-11-23 15:31:14,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 110 transitions, 268 flow [2022-11-23 15:31:15,000 INFO L130 PetriNetUnfolder]: 107/656 cut-off events. [2022-11-23 15:31:15,000 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-23 15:31:15,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 656 events. 107/656 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3155 event pairs, 2 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2022-11-23 15:31:15,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 3060 [2022-11-23 15:31:18,069 INFO L134 LiptonReduction]: Checked pairs total: 4792 [2022-11-23 15:31:18,069 INFO L136 LiptonReduction]: Total number of compositions: 85 [2022-11-23 15:31:18,070 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 37 transitions, 122 flow [2022-11-23 15:31:18,151 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1288 states, 1249 states have (on average 2.8286629303442754) internal successors, (3533), 1287 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:18,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:31:18,154 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@da5498c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:31:18,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 15:31:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 1288 states, 1249 states have (on average 2.8286629303442754) internal successors, (3533), 1287 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:31:18,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:18,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:31:18,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:31:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:18,161 INFO L85 PathProgramCache]: Analyzing trace with hash 525472228, now seen corresponding path program 1 times [2022-11-23 15:31:18,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:18,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615369363] [2022-11-23 15:31:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:18,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:18,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:18,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615369363] [2022-11-23 15:31:18,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615369363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:18,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:18,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:31:18,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614690902] [2022-11-23 15:31:18,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:18,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:18,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:18,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:18,228 INFO L87 Difference]: Start difference. First operand has 1288 states, 1249 states have (on average 2.8286629303442754) internal successors, (3533), 1287 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:18,363 INFO L93 Difference]: Finished difference Result 546 states and 1162 transitions. [2022-11-23 15:31:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:18,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:31:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:18,372 INFO L225 Difference]: With dead ends: 546 [2022-11-23 15:31:18,372 INFO L226 Difference]: Without dead ends: 211 [2022-11-23 15:31:18,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:18,374 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:18,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 12 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-23 15:31:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-11-23 15:31:18,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 208 states have (on average 2.4375) internal successors, (507), 210 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 507 transitions. [2022-11-23 15:31:18,404 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 507 transitions. Word has length 5 [2022-11-23 15:31:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:18,405 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 507 transitions. [2022-11-23 15:31:18,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 507 transitions. [2022-11-23 15:31:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:31:18,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:18,406 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 15:31:18,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:31:18,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-23 15:31:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:18,408 INFO L85 PathProgramCache]: Analyzing trace with hash -265675666, now seen corresponding path program 1 times [2022-11-23 15:31:18,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:18,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714151915] [2022-11-23 15:31:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:18,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:31:18,475 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:31:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:31:18,511 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:31:18,511 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:31:18,512 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-23 15:31:18,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-23 15:31:18,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-23 15:31:18,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-23 15:31:18,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-23 15:31:18,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:31:18,514 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 15:31:18,514 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 15:31:18,514 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 15:31:18,560 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-23 15:31:18,562 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:31:18,562 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 129 transitions, 336 flow [2022-11-23 15:31:18,563 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 129 transitions, 336 flow [2022-11-23 15:31:18,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 129 transitions, 336 flow [2022-11-23 15:31:19,035 INFO L130 PetriNetUnfolder]: 496/2280 cut-off events. [2022-11-23 15:31:19,036 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-23 15:31:19,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 2280 events. 496/2280 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 15033 event pairs, 64 based on Foata normal form. 0/1960 useless extension candidates. Maximal degree in co-relation 1399. Up to 192 conditions per place. [2022-11-23 15:31:19,092 INFO L119 LiptonReduction]: Number of co-enabled transitions 5478 [2022-11-23 15:31:22,456 INFO L134 LiptonReduction]: Checked pairs total: 9344 [2022-11-23 15:31:22,457 INFO L136 LiptonReduction]: Total number of compositions: 101 [2022-11-23 15:31:22,458 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 46 transitions, 170 flow [2022-11-23 15:31:23,436 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15618 states, 15419 states have (on average 3.792139568065374) internal successors, (58471), 15617 states have internal predecessors, (58471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:23,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:31:23,440 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@da5498c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:31:23,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-23 15:31:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 15618 states, 15419 states have (on average 3.792139568065374) internal successors, (58471), 15617 states have internal predecessors, (58471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:31:23,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:23,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:31:23,490 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-23 15:31:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash 760944645, now seen corresponding path program 1 times [2022-11-23 15:31:23,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:23,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173346658] [2022-11-23 15:31:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:23,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:23,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:23,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173346658] [2022-11-23 15:31:23,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173346658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:23,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:23,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:31:23,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121006546] [2022-11-23 15:31:23,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:23,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:23,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:23,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:23,680 INFO L87 Difference]: Start difference. First operand has 15618 states, 15419 states have (on average 3.792139568065374) internal successors, (58471), 15617 states have internal predecessors, (58471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:23,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:23,929 INFO L93 Difference]: Finished difference Result 6122 states and 17893 transitions. [2022-11-23 15:31:23,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:23,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:31:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:23,942 INFO L225 Difference]: With dead ends: 6122 [2022-11-23 15:31:23,942 INFO L226 Difference]: Without dead ends: 991 [2022-11-23 15:31:23,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:23,944 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:23,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 12 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-11-23 15:31:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2022-11-23 15:31:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 987 states have (on average 3.2492401215805473) internal successors, (3207), 990 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3207 transitions. [2022-11-23 15:31:24,016 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3207 transitions. Word has length 5 [2022-11-23 15:31:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:24,016 INFO L495 AbstractCegarLoop]: Abstraction has 991 states and 3207 transitions. [2022-11-23 15:31:24,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3207 transitions. [2022-11-23 15:31:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 15:31:24,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:24,019 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 15:31:24,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:31:24,019 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-23 15:31:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:24,020 INFO L85 PathProgramCache]: Analyzing trace with hash -224765725, now seen corresponding path program 1 times [2022-11-23 15:31:24,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:24,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513396081] [2022-11-23 15:31:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:31:24,043 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:31:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:31:24,062 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:31:24,062 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:31:24,062 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-23 15:31:24,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-23 15:31:24,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-23 15:31:24,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-23 15:31:24,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-23 15:31:24,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-23 15:31:24,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:31:24,065 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 15:31:24,065 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 15:31:24,066 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-23 15:31:24,098 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-11-23 15:31:24,148 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:31:24,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 148 transitions, 408 flow [2022-11-23 15:31:24,149 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 148 transitions, 408 flow [2022-11-23 15:31:24,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 148 transitions, 408 flow [2022-11-23 15:31:26,043 INFO L130 PetriNetUnfolder]: 2379/8746 cut-off events. [2022-11-23 15:31:26,044 INFO L131 PetriNetUnfolder]: For 2144/2144 co-relation queries the response was YES. [2022-11-23 15:31:26,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10911 conditions, 8746 events. 2379/8746 cut-off events. For 2144/2144 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 74816 event pairs, 626 based on Foata normal form. 0/7622 useless extension candidates. Maximal degree in co-relation 5388. Up to 1024 conditions per place. [2022-11-23 15:31:26,364 INFO L119 LiptonReduction]: Number of co-enabled transitions 8488 [2022-11-23 15:31:29,803 INFO L134 LiptonReduction]: Checked pairs total: 15834 [2022-11-23 15:31:29,803 INFO L136 LiptonReduction]: Total number of compositions: 115 [2022-11-23 15:31:29,804 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 55 transitions, 222 flow [2022-11-23 15:31:40,396 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 187432 states, 186281 states have (on average 4.758075166012637) internal successors, (886339), 187431 states have internal predecessors, (886339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:40,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:31:40,403 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@da5498c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:31:40,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-23 15:31:40,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 187432 states, 186281 states have (on average 4.758075166012637) internal successors, (886339), 187431 states have internal predecessors, (886339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:31:40,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:40,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:31:40,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:31:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1027902464, now seen corresponding path program 1 times [2022-11-23 15:31:40,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:40,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918295176] [2022-11-23 15:31:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:40,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:31:40,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:40,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918295176] [2022-11-23 15:31:40,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918295176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:31:40,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:31:40,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:31:40,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879542898] [2022-11-23 15:31:40,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:31:40,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:31:40,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:40,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:31:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:41,225 INFO L87 Difference]: Start difference. First operand has 187432 states, 186281 states have (on average 4.758075166012637) internal successors, (886339), 187431 states have internal predecessors, (886339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:43,555 INFO L93 Difference]: Finished difference Result 64304 states and 245080 transitions. [2022-11-23 15:31:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:31:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:31:43,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:43,613 INFO L225 Difference]: With dead ends: 64304 [2022-11-23 15:31:43,613 INFO L226 Difference]: Without dead ends: 4279 [2022-11-23 15:31:43,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:31:43,615 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:43,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 12 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:31:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2022-11-23 15:31:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 4279. [2022-11-23 15:31:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4279 states, 4274 states have (on average 4.127983153954141) internal successors, (17643), 4278 states have internal predecessors, (17643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4279 states to 4279 states and 17643 transitions. [2022-11-23 15:31:43,814 INFO L78 Accepts]: Start accepts. Automaton has 4279 states and 17643 transitions. Word has length 5 [2022-11-23 15:31:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:43,815 INFO L495 AbstractCegarLoop]: Abstraction has 4279 states and 17643 transitions. [2022-11-23 15:31:43,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4279 states and 17643 transitions. [2022-11-23 15:31:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 15:31:43,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:43,819 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:43,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:31:43,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:31:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:43,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1561813767, now seen corresponding path program 1 times [2022-11-23 15:31:43,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:43,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997999814] [2022-11-23 15:31:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:43,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:31:43,843 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:31:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:31:43,863 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:31:43,864 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:31:43,864 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-23 15:31:43,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-23 15:31:43,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-11-23 15:31:43,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-23 15:31:43,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-23 15:31:43,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-23 15:31:43,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-23 15:31:43,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:31:43,867 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 15:31:43,867 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 15:31:43,867 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-23 15:31:43,910 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2022-11-23 15:31:43,920 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:31:43,922 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 167 transitions, 484 flow [2022-11-23 15:31:43,923 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 167 transitions, 484 flow [2022-11-23 15:31:43,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 167 transitions, 484 flow [2022-11-23 15:31:51,545 INFO L130 PetriNetUnfolder]: 11372/35606 cut-off events. [2022-11-23 15:31:51,545 INFO L131 PetriNetUnfolder]: For 10450/10450 co-relation queries the response was YES. [2022-11-23 15:31:51,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46032 conditions, 35606 events. 11372/35606 cut-off events. For 10450/10450 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 379444 event pairs, 4296 based on Foata normal form. 0/31366 useless extension candidates. Maximal degree in co-relation 22301. Up to 5120 conditions per place. [2022-11-23 15:31:52,717 INFO L119 LiptonReduction]: Number of co-enabled transitions 12090 [2022-11-23 15:31:56,275 INFO L134 LiptonReduction]: Checked pairs total: 24649 [2022-11-23 15:31:56,276 INFO L136 LiptonReduction]: Total number of compositions: 131 [2022-11-23 15:31:56,277 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 278 flow