./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS --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 93834d0ed7ae29f55a5cf3676a6d16497c83e10891cd8a2ab18e9898a90eaebc --- 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 [2022-11-19 07:56:08,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:56:08,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:56:08,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:56:08,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:56:08,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:56:08,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:56:08,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:56:08,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:56:08,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:56:08,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:56:08,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:56:08,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:56:08,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:56:08,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:56:08,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:56:08,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:56:08,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:56:08,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:56:08,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:56:08,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:56:08,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:56:08,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:56:08,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:56:08,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:56:08,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:56:08,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:56:08,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:56:08,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:56:08,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:56:08,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:56:08,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:56:08,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:56:08,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:56:08,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:56:08,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:56:08,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:56:08,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:56:08,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:56:08,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:56:08,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:56:08,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:56:08,986 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:56:08,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:56:08,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:56:08,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:56:08,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:56:08,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:56:08,994 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:56:08,994 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:56:08,994 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:56:08,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:56:08,996 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:56:08,996 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:56:08,997 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:56:08,997 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:56:08,997 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:56:08,997 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:56:08,998 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:56:08,998 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:56:08,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:56:08,999 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:56:08,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:56:09,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:56:09,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:56:09,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:56:09,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:56:09,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:56:09,003 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:56:09,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:56:09,004 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:56:09,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:56:09,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:56:09,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:56:09,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:56:09,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:56:09,006 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:56:09,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:56:09,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:56:09,007 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:56:09,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:56:09,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:56:09,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:56:09,008 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_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93834d0ed7ae29f55a5cf3676a6d16497c83e10891cd8a2ab18e9898a90eaebc [2022-11-19 07:56:09,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:56:09,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:56:09,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:56:09,352 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:56:09,353 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:56:09,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2022-11-19 07:56:09,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/data/c288e9417/febf1f2bf3e64b45af2ba54896227a55/FLAGb6e065ec7 [2022-11-19 07:56:09,976 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:56:09,976 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2022-11-19 07:56:09,991 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/data/c288e9417/febf1f2bf3e64b45af2ba54896227a55/FLAGb6e065ec7 [2022-11-19 07:56:10,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/data/c288e9417/febf1f2bf3e64b45af2ba54896227a55 [2022-11-19 07:56:10,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:56:10,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:56:10,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:56:10,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:56:10,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:56:10,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c6edc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10, skipping insertion in model container [2022-11-19 07:56:10,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:56:10,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:56:10,712 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_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31043,31056] [2022-11-19 07:56:10,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:56:10,748 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:56:10,823 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_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31043,31056] [2022-11-19 07:56:10,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:56:10,875 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:56:10,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10 WrapperNode [2022-11-19 07:56:10,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:56:10,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:56:10,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:56:10,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:56:10,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,932 INFO L138 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 172 [2022-11-19 07:56:10,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:56:10,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:56:10,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:56:10,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:56:10,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,958 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:56:10,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:56:10,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:56:10,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:56:10,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (1/1) ... [2022-11-19 07:56:10,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:56:10,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:11,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:56:11,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a6f4a3-4d77-4a1e-940f-82378a8435f3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:56:11,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:56:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-19 07:56:11,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-19 07:56:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:56:11,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:56:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:56:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:56:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:56:11,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:56:11,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:56:11,064 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:56:11,258 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:56:11,273 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:56:11,654 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:56:11,895 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:56:11,896 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:56:11,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:11 BoogieIcfgContainer [2022-11-19 07:56:11,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:56:11,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:56:11,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:56:11,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:56:11,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:10" (1/3) ... [2022-11-19 07:56:11,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d6cff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:11, skipping insertion in model container [2022-11-19 07:56:11,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:10" (2/3) ... [2022-11-19 07:56:11,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d6cff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:11, skipping insertion in model container [2022-11-19 07:56:11,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:11" (3/3) ... [2022-11-19 07:56:11,908 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-2.i [2022-11-19 07:56:11,918 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-19 07:56:11,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:56:11,929 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:56:11,929 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:56:12,022 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-19 07:56:12,078 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:56:12,102 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 106 transitions, 217 flow [2022-11-19 07:56:12,108 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 106 transitions, 217 flow [2022-11-19 07:56:12,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 106 transitions, 217 flow [2022-11-19 07:56:12,163 INFO L130 PetriNetUnfolder]: 8/117 cut-off events. [2022-11-19 07:56:12,164 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-19 07:56:12,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 117 events. 8/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 113 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-11-19 07:56:12,172 INFO L119 LiptonReduction]: Number of co-enabled transitions 1904 [2022-11-19 07:56:19,105 INFO L134 LiptonReduction]: Checked pairs total: 1818 [2022-11-19 07:56:19,106 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-11-19 07:56:19,114 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 19 transitions, 43 flow [2022-11-19 07:56:19,141 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 49 states have (on average 2.142857142857143) internal successors, (105), 51 states have internal predecessors, (105), 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) [2022-11-19 07:56:19,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:56:19,176 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;@1bbbaa44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:56:19,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-19 07:56:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 49 states have (on average 2.142857142857143) internal successors, (105), 51 states have internal predecessors, (105), 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) [2022-11-19 07:56:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:56:19,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:19,185 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-19 07:56:19,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:19,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:19,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1033196352, now seen corresponding path program 1 times [2022-11-19 07:56:19,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:19,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975947333] [2022-11-19 07:56:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:19,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:19,315 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:56:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:19,367 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:56:19,370 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:56:19,371 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-19 07:56:19,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-19 07:56:19,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-19 07:56:19,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:56:19,379 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-19 07:56:19,382 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 07:56:19,383 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-19 07:56:19,452 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-19 07:56:19,456 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:56:19,457 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 175 transitions, 362 flow [2022-11-19 07:56:19,457 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 175 transitions, 362 flow [2022-11-19 07:56:19,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 175 transitions, 362 flow [2022-11-19 07:56:19,514 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2022-11-19 07:56:19,515 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-19 07:56:19,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 375 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-11-19 07:56:19,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 13192 [2022-11-19 07:56:28,591 INFO L134 LiptonReduction]: Checked pairs total: 25123 [2022-11-19 07:56:28,591 INFO L136 LiptonReduction]: Total number of compositions: 152 [2022-11-19 07:56:28,593 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 57 transitions, 126 flow [2022-11-19 07:56:28,724 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2621 states, 2613 states have (on average 3.1913509376195943) internal successors, (8339), 2620 states have internal predecessors, (8339), 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) [2022-11-19 07:56:28,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:56:28,732 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;@1bbbaa44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:56:28,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-19 07:56:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 2621 states, 2613 states have (on average 3.1913509376195943) internal successors, (8339), 2620 states have internal predecessors, (8339), 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) [2022-11-19 07:56:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:56:28,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:28,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:28,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 07:56:28,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:28,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1667860660, now seen corresponding path program 1 times [2022-11-19 07:56:28,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:28,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445552945] [2022-11-19 07:56:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:28,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:28,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:28,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445552945] [2022-11-19 07:56:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445552945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:28,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:28,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:56:28,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345608798] [2022-11-19 07:56:28,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:28,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:28,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:28,970 INFO L87 Difference]: Start difference. First operand has 2621 states, 2613 states have (on average 3.1913509376195943) internal successors, (8339), 2620 states have internal predecessors, (8339), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:29,245 INFO L93 Difference]: Finished difference Result 2653 states and 8017 transitions. [2022-11-19 07:56:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:29,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:56:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:29,290 INFO L225 Difference]: With dead ends: 2653 [2022-11-19 07:56:29,291 INFO L226 Difference]: Without dead ends: 2653 [2022-11-19 07:56:29,291 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 [2022-11-19 07:56:29,294 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:29,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 34 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:56:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2022-11-19 07:56:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 2333. [2022-11-19 07:56:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2327 states have (on average 3.042973785990546) internal successors, (7081), 2332 states have internal predecessors, (7081), 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) [2022-11-19 07:56:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 7081 transitions. [2022-11-19 07:56:29,472 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 7081 transitions. Word has length 10 [2022-11-19 07:56:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:29,473 INFO L495 AbstractCegarLoop]: Abstraction has 2333 states and 7081 transitions. [2022-11-19 07:56:29,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 7081 transitions. [2022-11-19 07:56:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:56:29,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:29,475 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-19 07:56:29,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:56:29,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 07:56:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1042218196, now seen corresponding path program 1 times [2022-11-19 07:56:29,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:29,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514436455] [2022-11-19 07:56:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:29,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:29,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:56:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:56:29,532 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:56:29,532 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:56:29,533 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-19 07:56:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-19 07:56:29,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-19 07:56:29,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-19 07:56:29,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:56:29,535 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-19 07:56:29,535 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 07:56:29,535 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-19 07:56:29,585 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-19 07:56:29,588 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:56:29,589 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 244 transitions, 509 flow [2022-11-19 07:56:29,589 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 244 transitions, 509 flow [2022-11-19 07:56:29,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 244 transitions, 509 flow [2022-11-19 07:56:29,665 INFO L130 PetriNetUnfolder]: 22/281 cut-off events. [2022-11-19 07:56:29,665 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-19 07:56:29,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 281 events. 22/281 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 746 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-11-19 07:56:29,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 33864 [2022-11-19 07:56:42,070 INFO L134 LiptonReduction]: Checked pairs total: 65374 [2022-11-19 07:56:42,071 INFO L136 LiptonReduction]: Total number of compositions: 210 [2022-11-19 07:56:42,072 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 75 places, 83 transitions, 187 flow [2022-11-19 07:56:44,744 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55230 states, 55211 states have (on average 4.370089293800149) internal successors, (241277), 55229 states have internal predecessors, (241277), 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) [2022-11-19 07:56:44,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:56:44,758 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;@1bbbaa44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:56:44,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-19 07:56:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 55230 states, 55211 states have (on average 4.370089293800149) internal successors, (241277), 55229 states have internal predecessors, (241277), 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) [2022-11-19 07:56:45,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:56:45,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:45,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:45,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-19 07:56:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1410947636, now seen corresponding path program 1 times [2022-11-19 07:56:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:45,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895156638] [2022-11-19 07:56:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:45,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:45,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:45,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895156638] [2022-11-19 07:56:45,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895156638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:45,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:45,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:56:45,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358111247] [2022-11-19 07:56:45,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:45,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:56:45,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:56:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:56:45,399 INFO L87 Difference]: Start difference. First operand has 55230 states, 55211 states have (on average 4.370089293800149) internal successors, (241277), 55229 states have internal predecessors, (241277), 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 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-19 07:56:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:47,353 INFO L93 Difference]: Finished difference Result 62603 states and 257290 transitions. [2022-11-19 07:56:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:56:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2022-11-19 07:56:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:48,529 INFO L225 Difference]: With dead ends: 62603 [2022-11-19 07:56:48,529 INFO L226 Difference]: Without dead ends: 62603 [2022-11-19 07:56:48,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:56:48,535 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 179 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:48,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 105 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:56:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62603 states. [2022-11-19 07:56:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62603 to 52093. [2022-11-19 07:56:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52093 states, 52079 states have (on average 4.129918009178364) internal successors, (215082), 52092 states have internal predecessors, (215082), 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) [2022-11-19 07:56:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52093 states to 52093 states and 215082 transitions. [2022-11-19 07:56:52,371 INFO L78 Accepts]: Start accepts. Automaton has 52093 states and 215082 transitions. Word has length 11 [2022-11-19 07:56:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:52,371 INFO L495 AbstractCegarLoop]: Abstraction has 52093 states and 215082 transitions. [2022-11-19 07:56:52,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-19 07:56:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 52093 states and 215082 transitions. [2022-11-19 07:56:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:56:52,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:52,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:52,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:56:52,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-19 07:56:52,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:52,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1591111217, now seen corresponding path program 1 times [2022-11-19 07:56:52,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:52,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211687113] [2022-11-19 07:56:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:52,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:52,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:52,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211687113] [2022-11-19 07:56:52,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211687113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:52,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:52,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:56:52,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579614458] [2022-11-19 07:56:52,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:52,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:52,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:52,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:52,492 INFO L87 Difference]: Start difference. First operand 52093 states and 215082 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-11-19 07:56:54,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:54,278 INFO L93 Difference]: Finished difference Result 59453 states and 243606 transitions. [2022-11-19 07:56:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:54,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2022-11-19 07:56:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:54,660 INFO L225 Difference]: With dead ends: 59453 [2022-11-19 07:56:54,660 INFO L226 Difference]: Without dead ends: 59453 [2022-11-19 07:56:54,661 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 [2022-11-19 07:56:54,662 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:54,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:56:55,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59453 states. [2022-11-19 07:56:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59453 to 59263. [2022-11-19 07:56:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59263 states, 59238 states have (on average 4.103683446436409) internal successors, (243094), 59262 states have internal predecessors, (243094), 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) [2022-11-19 07:56:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59263 states to 59263 states and 243094 transitions. [2022-11-19 07:56:58,619 INFO L78 Accepts]: Start accepts. Automaton has 59263 states and 243094 transitions. Word has length 12 [2022-11-19 07:56:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:58,619 INFO L495 AbstractCegarLoop]: Abstraction has 59263 states and 243094 transitions. [2022-11-19 07:56:58,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-11-19 07:56:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 59263 states and 243094 transitions. [2022-11-19 07:56:58,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:56:58,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:58,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:58,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:56:58,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-19 07:56:58,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:58,623 INFO L85 PathProgramCache]: Analyzing trace with hash -245030994, now seen corresponding path program 1 times [2022-11-19 07:56:58,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:58,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386993534] [2022-11-19 07:56:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:58,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:58,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386993534] [2022-11-19 07:56:58,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386993534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:58,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:58,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:56:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29056297] [2022-11-19 07:56:58,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:58,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:56:58,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:58,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:56:58,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:56:58,791 INFO L87 Difference]: Start difference. First operand 59263 states and 243094 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-19 07:57:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:00,729 INFO L93 Difference]: Finished difference Result 83485 states and 343112 transitions. [2022-11-19 07:57:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:57:00,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-11-19 07:57:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:01,612 INFO L225 Difference]: With dead ends: 83485 [2022-11-19 07:57:01,612 INFO L226 Difference]: Without dead ends: 83485 [2022-11-19 07:57:01,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:57:01,614 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 180 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:01,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 149 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:57:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83485 states. [2022-11-19 07:57:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83485 to 65617. [2022-11-19 07:57:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65617 states, 65592 states have (on average 4.098030247591169) internal successors, (268798), 65616 states have internal predecessors, (268798), 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) [2022-11-19 07:57:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65617 states to 65617 states and 268798 transitions. [2022-11-19 07:57:04,769 INFO L78 Accepts]: Start accepts. Automaton has 65617 states and 268798 transitions. Word has length 14 [2022-11-19 07:57:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:04,769 INFO L495 AbstractCegarLoop]: Abstraction has 65617 states and 268798 transitions. [2022-11-19 07:57:04,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-19 07:57:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 65617 states and 268798 transitions. [2022-11-19 07:57:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:57:04,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:04,774 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-19 07:57:04,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:57:04,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-19 07:57:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:04,775 INFO L85 PathProgramCache]: Analyzing trace with hash -109208116, now seen corresponding path program 1 times [2022-11-19 07:57:04,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:04,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291485587] [2022-11-19 07:57:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:04,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:57:04,808 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:57:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:57:04,826 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:57:04,827 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:57:04,827 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-19 07:57:04,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-19 07:57:04,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-19 07:57:04,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-19 07:57:04,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-19 07:57:04,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:57:04,829 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-19 07:57:04,829 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 07:57:04,829 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-19 07:57:04,898 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-19 07:57:04,902 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:57:04,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 313 transitions, 658 flow [2022-11-19 07:57:04,903 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 313 transitions, 658 flow [2022-11-19 07:57:04,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 313 transitions, 658 flow [2022-11-19 07:57:05,020 INFO L130 PetriNetUnfolder]: 29/363 cut-off events. [2022-11-19 07:57:05,021 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-19 07:57:05,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 363 events. 29/363 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1161 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 289. Up to 10 conditions per place. [2022-11-19 07:57:05,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 63920 [2022-11-19 07:57:20,241 INFO L134 LiptonReduction]: Checked pairs total: 129932 [2022-11-19 07:57:20,241 INFO L136 LiptonReduction]: Total number of compositions: 268 [2022-11-19 07:57:20,242 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 98 places, 109 transitions, 250 flow